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sgminer
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sgminer/main.c

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/*
* Copyright 2011 Con Kolivas
* Copyright 2010 Jeff Garzik
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version. See COPYING for more details.
*/
#include "config.h"
#include <curses.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
#include <stdint.h>
#include <unistd.h>
#include <sys/time.h>
#include <time.h>
#include <math.h>
#include <stdarg.h>
#include <assert.h>
#include <signal.h>
#ifndef WIN32
#include <sys/resource.h>
#endif
#include <ccan/opt/opt.h>
#include <jansson.h>
#include <curl/curl.h>
#include "compat.h"
#include "miner.h"
#include "findnonce.h"
#include "ocl.h"
#define PROGRAM_NAME "cgminer"
#define DEF_RPC_URL "http://127.0.0.1:8332/"
#define DEF_RPC_USERNAME "rpcuser"
#define DEF_RPC_PASSWORD "rpcpass"
#define DEF_RPC_USERPASS DEF_RPC_USERNAME ":" DEF_RPC_PASSWORD
#ifdef __linux /* Linux specific policy and affinity management */
#include <sched.h>
static inline void drop_policy(void)
{
struct sched_param param;
#ifdef SCHED_BATCH
#ifdef SCHED_IDLE
if (unlikely(sched_setscheduler(0, SCHED_IDLE, &param) == -1))
#endif
sched_setscheduler(0, SCHED_BATCH, &param);
#endif
}
static inline void affine_to_cpu(int id, int cpu)
{
cpu_set_t set;
CPU_ZERO(&set);
CPU_SET(cpu, &set);
sched_setaffinity(0, sizeof(&set), &set);
applog(LOG_INFO, "Binding cpu mining thread %d to cpu %d", id, cpu);
}
#else
static inline void drop_policy(void)
{
}
static inline void affine_to_cpu(int id, int cpu)
{
}
#endif
enum workio_commands {
WC_GET_WORK,
WC_SUBMIT_WORK,
WC_DIE,
};
struct workio_cmd {
enum workio_commands cmd;
struct thr_info *thr;
union {
struct work *work;
} u;
};
enum sha256_algos {
ALGO_C, /* plain C */
ALGO_4WAY, /* parallel SSE2 */
ALGO_VIA, /* VIA padlock */
ALGO_CRYPTOPP, /* Crypto++ (C) */
ALGO_CRYPTOPP_ASM32, /* Crypto++ 32-bit assembly */
ALGO_SSE2_64, /* SSE2 for x86_64 */
};
static const char *algo_names[] = {
[ALGO_C] = "c",
#ifdef WANT_SSE2_4WAY
[ALGO_4WAY] = "4way",
#endif
#ifdef WANT_VIA_PADLOCK
[ALGO_VIA] = "via",
#endif
[ALGO_CRYPTOPP] = "cryptopp",
#ifdef WANT_CRYPTOPP_ASM32
[ALGO_CRYPTOPP_ASM32] = "cryptopp_asm32",
#endif
#ifdef WANT_X8664_SSE2
[ALGO_SSE2_64] = "sse2_64",
#endif
};
bool opt_debug = false;
bool opt_protocol = false;
bool want_longpoll = true;
bool have_longpoll = false;
bool use_syslog = false;
static bool opt_quiet = false;
static int opt_retries = -1;
static int opt_fail_pause = 5;
static int opt_log_interval = 5;
bool opt_log_output = false;
static bool opt_dynamic = true;
static int opt_queue;
int opt_vectors;
int opt_worksize;
int opt_scantime = 60;
static const bool opt_time = true;
#ifdef WANT_X8664_SSE2
static enum sha256_algos opt_algo = ALGO_SSE2_64;
#else
static enum sha256_algos opt_algo = ALGO_C;
#endif
static int nDevs;
static int opt_g_threads = 2;
static int opt_device;
static int total_devices;
static bool gpu_devices[16];
static int gpu_threads;
static bool forced_n_threads;
static int opt_n_threads;
static int mining_threads;
static int num_processors;
static int scan_intensity;
static bool use_curses = true;
static char *rpc_url;
static char *rpc_userpass;
static char *rpc_user, *rpc_pass;
struct thr_info *thr_info;
static int work_thr_id;
int longpoll_thr_id;
static int stage_thr_id;
static int watchdog_thr_id;
struct work_restart *work_restart = NULL;
static pthread_mutex_t hash_lock;
static pthread_mutex_t qd_lock;
static pthread_mutex_t stgd_lock;
static pthread_mutex_t curses_lock;
static double total_mhashes_done;
static struct timeval total_tv_start, total_tv_end;
static int accepted, rejected;
int hw_errors;
static int total_queued, total_staged, lp_staged;
static bool localgen = false;
static bool idlenet = false;
static unsigned int getwork_requested;
static unsigned int stale_shares;
static unsigned int discarded_work;
static unsigned int new_blocks;
static unsigned int local_work;
static unsigned int localgen_occasions;
static unsigned int remotefail_occasions;
static char current_block[37];
static char longpoll_block[37];
static char blank[37];
static char datestamp[40];
struct sigaction termhandler, inthandler;
static void applog_and_exit(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
vapplog(LOG_ERR, fmt, ap);
va_end(ap);
exit(1);
}
/* FIXME: Use asprintf for better errors. */
static char *set_algo(const char *arg, enum sha256_algos *algo)
{
enum sha256_algos i;
for (i = 0; i < ARRAY_SIZE(algo_names); i++) {
if (algo_names[i] && !strcmp(arg, algo_names[i])) {
*algo = i;
return NULL;
}
}
return "Unknown algorithm";
}
static void show_algo(char buf[OPT_SHOW_LEN], const enum sha256_algos *algo)
{
strncpy(buf, algo_names[*algo], OPT_SHOW_LEN);
}
static char *set_int_range(const char *arg, int *i, int min, int max)
{
char *err = opt_set_intval(arg, i);
if (err)
return err;
if (*i < min || *i > max)
return "Value out of range";
return NULL;
}
static char *set_int_0_to_9999(const char *arg, int *i)
{
return set_int_range(arg, i, 0, 9999);
}
static char *forced_int_0_to_14(const char *arg, int *i)
{
opt_dynamic = false;
return set_int_range(arg, i, 0, 14);
}
static char *force_nthreads_int(const char *arg, int *i)
{
forced_n_threads = true;
return set_int_range(arg, i, 0, 9999);
}
static char *set_int_0_to_10(const char *arg, int *i)
{
return set_int_range(arg, i, 0, 10);
}
static char *set_devices(const char *arg, int *i)
{
char *err = opt_set_intval(arg, i);
if (err)
return err;
if (*i < 0 || *i > 15)
return "Invalid GPU device number";
total_devices++;
gpu_devices[*i] = true;
return NULL;
}
static char *set_url(const char *arg, char **p)
{
opt_set_charp(arg, p);
if (strncmp(arg, "http://", 7) &&
strncmp(arg, "https://", 8))
return "URL must start with http:// or https://";
return NULL;
}
static char *set_vector(const char *arg, int *i)
{
char *err = opt_set_intval(arg, i);
if (err)
return err;
if (*i != 1 && *i != 2 && *i != 4)
return "Valid vectors are 1, 2 or 4";
return NULL;
}
static char *enable_debug(bool *flag)
{
*flag = true;
/* Turn out verbose output, too. */
opt_log_output = true;
return NULL;
}
/* These options are available from config file or commandline */
static struct opt_table opt_config_table[] = {
OPT_WITH_ARG("--algo|-a",
set_algo, show_algo, &opt_algo,
"Specify sha256 implementation:\n"
"\tc\t\tLinux kernel sha256, implemented in C"
#ifdef WANT_SSE2_4WAY
"\n\t4way\t\ttcatm's 4-way SSE2 implementation"
#endif
#ifdef WANT_VIA_PADLOCK
"\n\tvia\t\tVIA padlock implementation"
#endif
"\n\tcryptopp\tCrypto++ C/C++ implementation"
#ifdef WANT_CRYPTOPP_ASM32
"\n\tcryptopp_asm32\tCrypto++ 32-bit assembler implementation"
#endif
#ifdef WANT_X8664_SSE2
"\n\tsse2_64\t\tSSE2 implementation for x86_64 machines"
#endif
),
OPT_WITH_ARG("--cpu-threads|-t",
force_nthreads_int, opt_show_intval, &opt_n_threads,
"Number of miner CPU threads"),
OPT_WITHOUT_ARG("--debug|-D",
enable_debug, &opt_debug,
"Enable debug output"),
#ifdef HAVE_OPENCL
OPT_WITH_ARG("--device|-d",
set_devices, NULL, &opt_device,
"Select device to use, (Use repeat -d for multiple devices, default: all)"),
OPT_WITH_ARG("--gpu-threads|-g",
set_int_0_to_10, opt_show_intval, &opt_g_threads,
"Number of threads per GPU (0 - 10)"),
OPT_WITH_ARG("--intensity|-I",
forced_int_0_to_14, opt_show_intval, &scan_intensity,
"Intensity of GPU scanning (0 - 14, default: dynamic to maintain desktop interactivity)"),
#endif
OPT_WITH_ARG("--log|-l",
set_int_0_to_9999, opt_show_intval, &opt_log_interval,
"Interval in seconds between log output"),
OPT_WITHOUT_ARG("--no-longpoll",
opt_set_invbool, &want_longpoll,
"Disable X-Long-Polling support"),
OPT_WITH_ARG("--pass|-p",
opt_set_charp, NULL, &rpc_pass,
"Password for bitcoin JSON-RPC server"),
OPT_WITHOUT_ARG("--protocol-dump|-P",
opt_set_bool, &opt_protocol,
"Verbose dump of protocol-level activities"),
OPT_WITH_ARG("--queue|-Q",
set_int_0_to_10, opt_show_intval, &opt_queue,
"Number of extra work items to queue (0 - 10)"),
OPT_WITHOUT_ARG("--quiet|-q",
opt_set_bool, &opt_quiet,
"Disable per-thread hashmeter output"),
OPT_WITH_ARG("--retries|-r",
opt_set_intval, opt_show_intval, &opt_retries,
"Number of times to retry before giving up, if JSON-RPC call fails (-1 means never)"),
OPT_WITH_ARG("--retry-pause|-R",
set_int_0_to_9999, opt_show_intval, &opt_fail_pause,
"Number of seconds to pause, between retries"),
OPT_WITH_ARG("--scan-time|-s",
set_int_0_to_9999, opt_show_intval, &opt_scantime,
"Upper bound on time spent scanning current work, in seconds"),
#ifdef HAVE_SYSLOG_H
OPT_WITHOUT_ARG("--syslog",
opt_set_bool, &use_syslog,
"Use system log for output messages (default: standard error)"),
#endif
OPT_WITHOUT_ARG("--text-only|-T",
opt_set_invbool, &use_curses,
"Disable ncurses formatted screen output"),
OPT_WITH_ARG("--url|-o",
set_url, opt_show_charp, &rpc_url,
"URL for bitcoin JSON-RPC server"),
OPT_WITH_ARG("--user|-u",
opt_set_charp, NULL, &rpc_user,
"Username for bitcoin JSON-RPC server"),
#ifdef HAVE_OPENCL
OPT_WITH_ARG("--vectors|-v",
set_vector, NULL, &opt_vectors,
"Override detected optimal vector width (1, 2 or 4)"),
#endif
OPT_WITHOUT_ARG("--verbose",
opt_set_bool, &opt_log_output,
"Log verbose output to stderr as well as status output"),
#ifdef HAVE_OPENCL
OPT_WITH_ARG("--worksize|-w",
set_int_0_to_9999, opt_show_intval, &opt_worksize,
"Override detected optimal worksize"),
#endif
OPT_WITH_ARG("--userpass|-O",
opt_set_charp, NULL, &rpc_userpass,
"Username:Password pair for bitcoin JSON-RPC server"),
OPT_ENDTABLE
};
static char *parse_config(json_t *config)
{
static char err_buf[200];
json_t *val;
struct opt_table *opt;
for (opt = opt_config_table; opt->type != OPT_END; opt++) {
char *p, *name;
/* We don't handle subtables. */
assert(!(opt->type & OPT_SUBTABLE));
/* Pull apart the option name(s). */
name = strdup(opt->names);
for (p = strtok(name, "|"); p; p = strtok(NULL, "|")) {
char *err;
/* Ignore short options. */
if (p[1] != '-')
continue;
val = json_object_get(config, p+2);
if (!val)
continue;
if ((opt->type & OPT_HASARG) && json_is_string(val)) {
err = opt->cb_arg(json_string_value(val),
opt->u.arg);
} else if ((opt->type&OPT_NOARG) && json_is_true(val)) {
err = opt->cb(opt->u.arg);
} else {
err = "Invalid value";
}
if (err) {
sprintf(err_buf, "Parsing JSON option %s: %s",
p, err);
return err_buf;
}
}
free(name);
}
return NULL;
}
static char *load_config(const char *arg, void *unused)
{
json_error_t err;
json_t *config;
config = json_load_file(arg, 0, &err);
if (!json_is_object(config))
return "JSON decode of file failed";
/* Parse the config now, so we can override it. That can keep pointers
* so don't free config object. */
return parse_config(config);
}
static char *print_ndevs_and_exit(int *ndevs)
{
printf("%i GPU devices detected\n", *ndevs);
exit(*ndevs);
}
/* These options are available from commandline only */
static struct opt_table opt_cmdline_table[] = {
OPT_WITH_ARG("--config|-c",
load_config, NULL, NULL,
"Load a JSON-format configuration file\n"
"See example-cfg.json for an example configuration."),
OPT_WITHOUT_ARG("--help|-h",
opt_usage_and_exit,
#ifdef HAVE_OPENCL
"\nBuilt with CPU and GPU mining support.\n\n",
#else
"\nBuilt with CPU mining support only.\n\n",
#endif
"Print this message"),
OPT_WITHOUT_ARG("--ndevs|-n",
print_ndevs_and_exit, &nDevs,
"Enumerate number of detected GPUs and exit"),
OPT_ENDTABLE
};
static bool jobj_binary(const json_t *obj, const char *key,
void *buf, size_t buflen)
{
const char *hexstr;
json_t *tmp;
tmp = json_object_get(obj, key);
if (unlikely(!tmp)) {
applog(LOG_ERR, "JSON key '%s' not found", key);
return false;
}
hexstr = json_string_value(tmp);
if (unlikely(!hexstr)) {
applog(LOG_ERR, "JSON key '%s' is not a string", key);
return false;
}
if (!hex2bin(buf, hexstr, buflen))
return false;
return true;
}
static bool work_decode(const json_t *val, struct work *work)
{
if (unlikely(!jobj_binary(val, "midstate",
work->midstate, sizeof(work->midstate)))) {
applog(LOG_ERR, "JSON inval midstate");
goto err_out;
}
if (unlikely(!jobj_binary(val, "data", work->data, sizeof(work->data)))) {
applog(LOG_ERR, "JSON inval data");
goto err_out;
}
if (unlikely(!jobj_binary(val, "hash1", work->hash1, sizeof(work->hash1)))) {
applog(LOG_ERR, "JSON inval hash1");
goto err_out;
}
if (unlikely(!jobj_binary(val, "target", work->target, sizeof(work->target)))) {
applog(LOG_ERR, "JSON inval target");
goto err_out;
}
memset(work->hash, 0, sizeof(work->hash));
return true;
err_out:
return false;
}
static inline int dev_from_id(int thr_id)
{
return thr_info[thr_id].cgpu->cpu_gpu;
}
static WINDOW *mainwin, *statuswin, *logwin;
static double total_secs = 0.1;
static char statusline[256];
static int cpucursor, gpucursor, logstart, logcursor;
static bool curses_active = false;
static struct cgpu_info *gpus, *cpus;
static void text_print_status(int thr_id)
{
struct cgpu_info *cgpu = thr_info[thr_id].cgpu;
printf(" %sPU %d: [%.1f Mh/s] [Q:%d A:%d R:%d HW:%d E:%.0f%% U:%.2f/m]\n",
cgpu->is_gpu ? "G" : "C", cgpu->cpu_gpu, cgpu->total_mhashes / total_secs,
cgpu->getworks, cgpu->accepted, cgpu->rejected, cgpu->hw_errors,
cgpu->efficiency, cgpu->utility);
}
/* Must be called with curses mutex lock held and curses_active */
static void curses_print_status(int thr_id)
{
wmove(statuswin, 0, 0);
wattron(statuswin, A_BOLD);
wprintw(statuswin, " " PROGRAM_NAME " version " VERSION " - Started: %s", datestamp);
wattroff(statuswin, A_BOLD);
wmove(statuswin, 1, 0);
whline(statuswin, '-', 80);
wmove(statuswin, 2,0);
wprintw(statuswin, " %s", statusline);
wclrtoeol(statuswin);
wmove(statuswin, 4,0);
wprintw(statuswin, " TQ: %d ST: %d LS: %d SS: %d DW: %d NB: %d LW: %d LO: %d RF: %d I: %d",
total_queued, total_staged, lp_staged, stale_shares, discarded_work, new_blocks,
local_work, localgen_occasions, remotefail_occasions, scan_intensity);
wclrtoeol(statuswin);
wmove(statuswin, 5, 0);
whline(statuswin, '-', 80);
wmove(statuswin, logstart - 1, 0);
whline(statuswin, '-', 80);
if (thr_id >= 0 && thr_id < gpu_threads) {
int gpu = dev_from_id(thr_id);
struct cgpu_info *cgpu = &gpus[gpu];
wmove(statuswin, gpucursor + gpu, 0);
wprintw(statuswin, " GPU %d: [%.1f Mh/s] [Q:%d A:%d R:%d HW:%d E:%.0f%% U:%.2f/m]",
gpu, cgpu->total_mhashes / total_secs,
cgpu->getworks, cgpu->accepted, cgpu->rejected, cgpu->hw_errors,
cgpu->efficiency, cgpu->utility);
wclrtoeol(statuswin);
} else if (thr_id >= gpu_threads) {
int cpu = dev_from_id(thr_id);
struct cgpu_info *cgpu = &cpus[cpu];
wmove(statuswin, cpucursor + cpu, 0);
wprintw(statuswin, " CPU %d: [%.1f Mh/s] [Q:%d A:%d R:%d HW:%d E:%.0f%% U:%.2f/m]",
cpu, cgpu->total_mhashes / total_secs,
cgpu->getworks, cgpu->accepted, cgpu->rejected, cgpu->hw_errors,
cgpu->efficiency, cgpu->utility);
wclrtoeol(statuswin);
}
wrefresh(statuswin);
}
static void print_status(int thr_id)
{
if (!curses_active)
text_print_status(thr_id);
else {
pthread_mutex_lock(&curses_lock);
curses_print_status(thr_id);
wrefresh(statuswin);
pthread_mutex_unlock(&curses_lock);
}
}
void log_curses(const char *f, va_list ap)
{
if (curses_active) {
pthread_mutex_lock(&curses_lock);
vw_printw(logwin, f, ap);
wrefresh(logwin);
pthread_mutex_unlock(&curses_lock);
} else
vprintf(f, ap);
}
static bool submit_fail = false;
static bool submit_upstream_work(const struct work *work)
{
char *hexstr = NULL;
json_t *val, *res;
char s[345];
bool rc = false;
int thr_id = work->thr_id;
struct cgpu_info *cgpu = thr_info[thr_id].cgpu;
CURL *curl = curl_easy_init();
if (unlikely(!curl)) {
applog(LOG_ERR, "CURL initialisation failed");
return rc;
}
/* build hex string */
hexstr = bin2hex(work->data, sizeof(work->data));
if (unlikely(!hexstr)) {
applog(LOG_ERR, "submit_upstream_work OOM");
goto out_nofree;
}
/* build JSON-RPC request */
sprintf(s,
"{\"method\": \"getwork\", \"params\": [ \"%s\" ], \"id\":1}\r\n",
hexstr);
if (opt_debug)
applog(LOG_DEBUG, "DBG: sending RPC call: %s", s);
/* issue JSON-RPC request */
val = json_rpc_call(curl, rpc_url, rpc_userpass, s, false, false);
if (unlikely(!val)) {
applog(LOG_INFO, "submit_upstream_work json_rpc_call failed");
if (!submit_fail) {
submit_fail = true;
remotefail_occasions++;
applog(LOG_WARNING, "Upstream communication failure, caching submissions");
}
goto out;
} else if (submit_fail) {
submit_fail = false;
applog(LOG_WARNING, "Upstream communication resumed, submitting work");
}
res = json_object_get(val, "result");
/* Theoretically threads could race when modifying accepted and
* rejected values but the chance of two submits completing at the
* same time is zero so there is no point adding extra locking */
if (json_is_true(res)) {
cgpu->accepted++;
accepted++;
if (opt_debug)
applog(LOG_DEBUG, "PROOF OF WORK RESULT: true (yay!!!)");
if (!opt_quiet)
applog(LOG_WARNING, "Share accepted from %sPU %d thread %d",
cgpu->is_gpu? "G" : "C", cgpu->cpu_gpu, thr_id);
} else {
cgpu->rejected++;
rejected++;
if (opt_debug)
applog(LOG_DEBUG, "PROOF OF WORK RESULT: false (booooo)");
if (!opt_quiet)
applog(LOG_WARNING, "Share rejected from %sPU %d thread %d",
cgpu->is_gpu? "G" : "C", cgpu->cpu_gpu, thr_id);
}
cgpu->utility = cgpu->accepted / ( total_secs ? total_secs : 1 ) * 60;
cgpu->efficiency = cgpu->getworks ? cgpu->accepted * 100.0 / cgpu->getworks : 0.0;
if (!opt_quiet)
print_status(thr_id);
applog(LOG_INFO, "%sPU %d Q:%d A:%d R:%d HW:%d E:%.0f%% U:%.2f/m",
cgpu->is_gpu? "G" : "C", cgpu->cpu_gpu, cgpu->getworks, cgpu->accepted,
cgpu->rejected, cgpu->hw_errors, cgpu->efficiency, cgpu->utility);
json_decref(val);
rc = true;
out:
free(hexstr);
out_nofree:
curl_easy_cleanup(curl);
return rc;
}
static const char *rpc_req =
"{\"method\": \"getwork\", \"params\": [], \"id\":0}\r\n";
static bool get_upstream_work(struct work *work)
{
json_t *val;
bool rc = false;
CURL *curl = curl_easy_init();
if (unlikely(!curl)) {
applog(LOG_ERR, "CURL initialisation failed");
return rc;
}
val = json_rpc_call(curl, rpc_url, rpc_userpass, rpc_req,
want_longpoll, false);
if (unlikely(!val)) {
applog(LOG_DEBUG, "Failed json_rpc_call in get_upstream_work");
goto out;
}
rc = work_decode(json_object_get(val, "result"), work);
json_decref(val);
out:
curl_easy_cleanup(curl);
return rc;
}
static void workio_cmd_free(struct workio_cmd *wc)
{
if (!wc)
return;
switch (wc->cmd) {
case WC_SUBMIT_WORK:
free(wc->u.work);
break;
default: /* do nothing */
break;
}
memset(wc, 0, sizeof(*wc)); /* poison */
free(wc);
}
static void disable_curses(void)
{
if (curses_active) {
curses_active = false;
delwin(logwin);
delwin(statuswin);
delwin(mainwin);
endwin();
refresh();
}
}
void kill_work(void)
{
struct workio_cmd *wc;
struct thr_info *thr;
unsigned int i;
disable_curses();
applog(LOG_INFO, "Received kill message");
/* Kill the watchdog thread */
thr = &thr_info[watchdog_thr_id];
pthread_cancel(thr->pth);
/* Stop the mining threads*/
for (i = 0; i < mining_threads; i++) {
thr = &thr_info[i];
tq_freeze(thr->q);
/* No need to check if this succeeds or not */
pthread_cancel(thr->pth);
}
/* Stop the others */
thr = &thr_info[stage_thr_id];
pthread_cancel(thr->pth);
thr = &thr_info[longpoll_thr_id];
pthread_cancel(thr->pth);
wc = calloc(1, sizeof(*wc));
if (unlikely(!wc)) {
applog(LOG_ERR, "Failed to calloc wc in kill_work");
/* We're just trying to die anyway, so forget graceful */
exit (1);
}
wc->cmd = WC_DIE;
wc->thr = 0;
if (unlikely(!tq_push(thr_info[work_thr_id].q, wc))) {
applog(LOG_ERR, "Failed to tq_push work in kill_work");
exit (1);
}
}
static void sighandler(int sig)
{
/* Restore signal handlers so we can still quit if kill_work fails */
sigaction(SIGTERM, &termhandler, NULL);
sigaction(SIGINT, &inthandler, NULL);
kill_work();
}
static void *get_work_thread(void *userdata)
{
struct workio_cmd *wc = (struct workio_cmd *)userdata;
struct work *ret_work;
int failures = 0;
pthread_detach(pthread_self());
ret_work = calloc(1, sizeof(*ret_work));
if (unlikely(!ret_work)) {
applog(LOG_ERR, "Failed to calloc ret_work in workio_get_work");
kill_work();
goto out;
}
/* obtain new work from bitcoin via JSON-RPC */
while (!get_upstream_work(ret_work)) {
if (unlikely((opt_retries >= 0) && (++failures > opt_retries))) {
applog(LOG_ERR, "json_rpc_call failed, terminating workio thread");
free(ret_work);
kill_work();
goto out;
}
/* pause, then restart work-request loop */
applog(LOG_DEBUG, "json_rpc_call failed on get work, retry after %d seconds",
opt_fail_pause);
sleep(opt_fail_pause);
}
/* send work to requesting thread */
if (unlikely(!tq_push(thr_info[stage_thr_id].q, ret_work))) {
applog(LOG_ERR, "Failed to tq_push work in workio_get_work");
kill_work();
free(ret_work);
}
out:
workio_cmd_free(wc);
return NULL;
}
static bool workio_get_work(struct workio_cmd *wc)
{
pthread_t get_thread;
if (unlikely(pthread_create(&get_thread, NULL, get_work_thread, (void *)wc))) {
applog(LOG_ERR, "Failed to create get_work_thread");
return false;
}
return true;
}
static bool stale_work(struct work *work)
{
bool ret = false;
char *hexstr;
if (!strncmp(blank, current_block, 36))
return ret;
hexstr = bin2hex(work->data, 36);
if (unlikely(!hexstr)) {
applog(LOG_ERR, "submit_work_thread OOM");
return ret;
}
if (strncmp(hexstr, current_block, 36))
ret = true;
free(hexstr);
return ret;
}
static void *submit_work_thread(void *userdata)
{
struct workio_cmd *wc = (struct workio_cmd *)userdata;
int failures = 0;
pthread_detach(pthread_self());
if (stale_work(wc->u.work)) {
applog(LOG_WARNING, "Stale share detected, discarding");
stale_shares++;
goto out;
}
/* submit solution to bitcoin via JSON-RPC */
while (!submit_upstream_work(wc->u.work)) {
if (stale_work(wc->u.work)) {
applog(LOG_WARNING, "Stale share detected, discarding");
stale_shares++;
break;
}
if (unlikely((opt_retries >= 0) && (++failures > opt_retries))) {
applog(LOG_ERR, "Failed %d retries ...terminating workio thread", opt_retries);
kill_work();
break;
}
/* pause, then restart work-request loop */
applog(LOG_INFO, "json_rpc_call failed on submit_work, retry after %d seconds",
opt_fail_pause);
sleep(opt_fail_pause);
}
out:
workio_cmd_free(wc);
return NULL;
}
static bool workio_submit_work(struct workio_cmd *wc)
{
pthread_t submit_thread;
if (unlikely(pthread_create(&submit_thread, NULL, submit_work_thread, (void *)wc))) {
applog(LOG_ERR, "Failed to create submit_work_thread");
return false;
}
return true;
}
static void inc_staged(int inc, bool lp)
{
pthread_mutex_lock(&stgd_lock);
if (lp) {
lp_staged += inc;
total_staged += inc;
idlenet = true;
} else if (lp_staged) {
if (!--lp_staged) {
unsigned int i;
/* Make sure the watchdog thread doesn't kill the mining
* threads once we unset the idlenet flag */
for (i = 0; i < mining_threads; i++)
gettimeofday(&thr_info[i].last, NULL);
idlenet = false;
}
} else
total_staged += inc;
pthread_mutex_unlock(&stgd_lock);
}
static void dec_staged(int inc)
{
pthread_mutex_lock(&stgd_lock);
total_staged -= inc;
pthread_mutex_unlock(&stgd_lock);
}
static int requests_staged(void)
{
int ret;
pthread_mutex_lock(&stgd_lock);
ret = total_staged;
pthread_mutex_unlock(&stgd_lock);
return ret;
}
static void *stage_thread(void *userdata)
{
struct thr_info *mythr = userdata;
bool ok = true;
pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, NULL);
while (ok) {
struct work *work = NULL;
char *hexstr;
work = tq_pop(mythr->q, NULL);
if (unlikely(!work)) {
applog(LOG_ERR, "Failed to tq_pop in stage_thread");
ok = false;
break;
}
hexstr = bin2hex(work->data, 36);
if (unlikely(!hexstr)) {
applog(LOG_ERR, "stage_thread OOM");
break;
}
/* current_block is blanked out on successful longpoll */
if (likely(strncmp(current_block, blank, 36))) {
if (unlikely(strncmp(hexstr, current_block, 36))) {
new_blocks++;
if (have_longpoll)
applog(LOG_WARNING, "New block detected on network before longpoll, waiting on fresh work");
else
applog(LOG_WARNING, "New block detected on network, waiting on fresh work");
/* As we can't flush the work from here, signal
* the wakeup thread to restart all the
* threads */
work_restart[stage_thr_id].restart = 1;
}
} else
memcpy(longpoll_block, hexstr, 36);
memcpy(current_block, hexstr, 36);
free(hexstr);
if (unlikely(!tq_push(thr_info[0].q, work))) {
applog(LOG_ERR, "Failed to tq_push work in stage_thread");
ok = false;
break;
}
inc_staged(1, false);
}
tq_freeze(mythr->q);
return NULL;
}
static void *workio_thread(void *userdata)
{
struct thr_info *mythr = userdata;
bool ok = true;
while (ok) {
struct workio_cmd *wc;
/* wait for workio_cmd sent to us, on our queue */
wc = tq_pop(mythr->q, NULL);
if (unlikely(!wc)) {
applog(LOG_ERR, "Failed to tq_pop in workio_thread");
ok = false;
break;
}
/* process workio_cmd */
switch (wc->cmd) {
case WC_GET_WORK:
ok = workio_get_work(wc);
break;
case WC_SUBMIT_WORK:
ok = workio_submit_work(wc);
break;
case WC_DIE:
default:
ok = false;
break;
}
}
tq_freeze(mythr->q);
return NULL;
}
static void hashmeter(int thr_id, struct timeval *diff,
unsigned long hashes_done)
{
struct timeval temp_tv_end, total_diff;
double khashes, secs;
double local_secs;
double utility, efficiency = 0.0;
static double local_mhashes_done = 0;
static double rolling_local = 0;
double local_mhashes = (double)hashes_done / 1000000.0;
struct cgpu_info *cgpu = thr_info[thr_id].cgpu;
/* Update the last time this thread reported in */
if (thr_id >= 0)
gettimeofday(&thr_info[thr_id].last, NULL);
/* Don't bother calculating anything if we're not displaying it */
if (opt_quiet || !opt_log_interval)
return;
khashes = hashes_done / 1000.0;
secs = (double)diff->tv_sec + ((double)diff->tv_usec / 1000000.0);
if (thr_id >= 0 && secs) {
/* So we can call hashmeter from a non worker thread */
if (opt_debug)
applog(LOG_DEBUG, "[thread %d: %lu hashes, %.0f khash/sec]",
thr_id, hashes_done, hashes_done / secs);
cgpu->local_mhashes += local_mhashes;
cgpu->total_mhashes += local_mhashes;
}
/* Totals are updated by all threads so can race without locking */
pthread_mutex_lock(&hash_lock);
gettimeofday(&temp_tv_end, NULL);
timeval_subtract(&total_diff, &temp_tv_end, &total_tv_end);
local_secs = (double)total_diff.tv_sec + ((double)total_diff.tv_usec / 1000000.0);
total_mhashes_done += local_mhashes;
local_mhashes_done += local_mhashes;
if (total_diff.tv_sec < opt_log_interval)
/* Only update the total every opt_log_interval seconds */
goto out_unlock;
gettimeofday(&total_tv_end, NULL);
/* Use a rolling average by faking an exponential decay over 5 * log */
rolling_local = ((rolling_local * 0.9) + local_mhashes_done) / 1.9;
timeval_subtract(&total_diff, &total_tv_end, &total_tv_start);
total_secs = (double)total_diff.tv_sec +
((double)total_diff.tv_usec / 1000000.0);
utility = accepted / ( total_secs ? total_secs : 1 ) * 60;
efficiency = getwork_requested ? accepted * 100.0 / getwork_requested : 0.0;
sprintf(statusline, "[(%ds):%.1f (avg):%.1f Mh/s] [Q:%d A:%d R:%d HW:%d E:%.0f%% U:%.2f/m]",
opt_log_interval, rolling_local / local_secs, total_mhashes_done / total_secs,
getwork_requested, accepted, rejected, hw_errors, efficiency, utility);
if (!curses_active) {
printf("%s \r", statusline);
fflush(stdout);
} else
applog(LOG_INFO, "%s", statusline);
local_mhashes_done = 0;
out_unlock:
pthread_mutex_unlock(&hash_lock);
}
/* This is overkill, but at least we'll know accurately how much work is
* queued to prevent ever being left without work */
static void inc_queued(void)
{
pthread_mutex_lock(&qd_lock);
total_queued++;
pthread_mutex_unlock(&qd_lock);
}
static void dec_queued(void)
{
pthread_mutex_lock(&qd_lock);
total_queued--;
pthread_mutex_unlock(&qd_lock);
dec_staged(1);
}
static int requests_queued(void)
{
int ret;
pthread_mutex_lock(&qd_lock);
ret = total_queued;
pthread_mutex_unlock(&qd_lock);
return ret;
}
/* All work is queued flagged as being for thread 0 and then the mining thread
* flags it as its own */
static bool queue_request(void)
{
struct thr_info *thr = &thr_info[0];
struct workio_cmd *wc;
/* If we've been generating lots of local work we may already have
* enough in the queue */
if (requests_queued() >= opt_queue + mining_threads)
return true;
/* fill out work request message */
wc = calloc(1, sizeof(*wc));
if (unlikely(!wc)) {
applog(LOG_ERR, "Failed to tq_pop in queue_request");
return false;
}
wc->cmd = WC_GET_WORK;
wc->thr = thr;
/* send work request to workio thread */
if (unlikely(!tq_push(thr_info[work_thr_id].q, wc))) {
applog(LOG_ERR, "Failed to tq_push in queue_request");
workio_cmd_free(wc);
return false;
}
getwork_requested++;
inc_queued();
return true;
}
static bool discard_request(void)
{
struct thr_info *thr = &thr_info[0];
struct work *work_heap;
/* Just in case we fell in a hole and missed a queue filling */
if (unlikely(!requests_queued())) {
applog(LOG_WARNING, "Tried to discard_request with nil queued");
return true;
}
work_heap = tq_pop(thr->q, NULL);
if (unlikely(!work_heap)) {
applog(LOG_ERR, "Failed to tq_pop in discard_request");
return false;
}
free(work_heap);
dec_queued();
discarded_work++;
return true;
}
static void flush_requests(bool longpoll)
{
int i, extra;
extra = requests_queued();
/* When flushing from longpoll, we don't know the new work yet. When
* not flushing from longpoll, the first work item is valid so do not
* discard it */
if (longpoll)
memcpy(current_block, blank, 36);
else
extra--;
/* Temporarily increase the staged count so that get_work thinks there
* is work available instead of making threads reuse existing work */
inc_staged(mining_threads, true);
for (i = 0; i < extra; i++) {
/* Queue a whole batch of new requests */
if (unlikely(!queue_request())) {
applog(LOG_ERR, "Failed to queue requests in flush_requests");
kill_work();
break;
}
/* Pop off the old requests. Cancelling the requests would be better
* but is tricky */
if (unlikely(!discard_request())) {
applog(LOG_ERR, "Failed to discard requests in flush_requests");
kill_work();
break;
}
}
}
static bool get_work(struct work *work, bool queued)
{
static struct timeval tv_localgen = {};
struct thr_info *thr = &thr_info[0];
struct work *work_heap;
bool ret = false;
int failures = 0;
retry:
if (unlikely(!queued && !queue_request())) {
applog(LOG_WARNING, "Failed to queue_request in get_work");
goto out;
}
if (!requests_staged() && !stale_work(work)) {
uint32_t *work_ntime;
uint32_t ntime;
/* Only print this message once each time we shift to localgen */
if (!localgen) {
localgen = true;
applog(LOG_WARNING, "Server not providing work fast enough, generating work locally");
localgen_occasions++;
gettimeofday(&tv_localgen, NULL);
} else {
struct timeval tv_now, diff;
gettimeofday(&tv_now, NULL);
timeval_subtract(&diff, &tv_now, &tv_localgen);
if (diff.tv_sec > 600) {
/* A new block appears on average every 10 mins */
applog(LOG_WARNING, "Prolonged outage. Going idle till network recovers.");
/* Force every thread to wait for new work */
inc_staged(mining_threads, true);
goto retry;
}
}
work_ntime = (uint32_t *)(work->data + 68);
ntime = be32toh(*work_ntime);
ntime++;
*work_ntime = htobe32(ntime);
ret = true;
local_work++;
goto out;
}
/* wait for 1st response, or get cached response */
work_heap = tq_pop(thr->q, NULL);
if (unlikely(!work_heap)) {
applog(LOG_WARNING, "Failed to tq_pop in get_work");
goto out;
}
/* If we make it here we have succeeded in getting fresh work */
if (localgen) {
localgen = false;
applog(LOG_WARNING, "Resuming with work from server");
}
dec_queued();
memcpy(work, work_heap, sizeof(*work));
ret = true;
free(work_heap);
out:
if (unlikely(ret == false)) {
if ((opt_retries >= 0) && (++failures > opt_retries)) {
applog(LOG_ERR, "Failed %d times to get_work");
return ret;
}
applog(LOG_DEBUG, "Retrying after %d seconds", opt_fail_pause);
sleep(opt_fail_pause);
goto retry;
}
return ret;
}
static bool submit_work_sync(struct thr_info *thr, const struct work *work_in)
{
struct workio_cmd *wc;
/* fill out work request message */
wc = calloc(1, sizeof(*wc));
if (unlikely(!wc)) {
applog(LOG_ERR, "Failed to calloc wc in submit_work_sync");
return false;
}
wc->u.work = malloc(sizeof(*work_in));
if (unlikely(!wc->u.work)) {
applog(LOG_ERR, "Failed to calloc work in submit_work_sync");
goto err_out;
}
wc->cmd = WC_SUBMIT_WORK;
wc->thr = thr;
memcpy(wc->u.work, work_in, sizeof(*work_in));
/* send solution to workio thread */
if (unlikely(!tq_push(thr_info[work_thr_id].q, wc))) {
applog(LOG_ERR, "Failed to tq_push work in submit_work_sync");
goto err_out;
}
return true;
err_out:
workio_cmd_free(wc);
return false;
}
bool submit_nonce(struct thr_info *thr, struct work *work, uint32_t nonce)
{
work->data[64+12+0] = (nonce>>0) & 0xff;
work->data[64+12+1] = (nonce>>8) & 0xff;
work->data[64+12+2] = (nonce>>16) & 0xff;
work->data[64+12+3] = (nonce>>24) & 0xff;
return submit_work_sync(thr, work);
}
static void *miner_thread(void *userdata)
{
struct thr_info *mythr = userdata;
const int thr_id = mythr->id;
uint32_t max_nonce = 0xffffff;
unsigned long hashes_done = max_nonce;
bool needs_work = true;
/* Try to cycle approximately 5 times before each log update */
const unsigned long cycle = opt_log_interval / 5 ? : 1;
/* Request the next work item at 2/3 of the scantime */
unsigned const int request_interval = opt_scantime * 2 / 3 ? : 1;
unsigned const long request_nonce = MAXTHREADS / 3 * 2;
bool requested = true;
pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, NULL);
/* Set worker threads to nice 19 and then preferentially to SCHED_IDLE
* and if that fails, then SCHED_BATCH. No need for this to be an
* error if it fails */
setpriority(PRIO_PROCESS, 0, 19);
drop_policy();
/* Cpu affinity only makes sense if the number of threads is a multiple
* of the number of CPUs */
if (!(opt_n_threads % num_processors))
affine_to_cpu(thr_id - gpu_threads, dev_from_id(thr_id));
while (1) {
struct work work __attribute__((aligned(128)));
struct timeval tv_workstart, tv_start, tv_end, diff;
uint64_t max64;
bool rc;
if (needs_work) {
gettimeofday(&tv_workstart, NULL);
/* obtain new work from internal workio thread */
if (unlikely(!get_work(&work, requested))) {
applog(LOG_ERR, "work retrieval failed, exiting "
"mining thread %d", thr_id);
goto out;
}
mythr->cgpu->getworks++;
work.thr_id = thr_id;
needs_work = requested = false;
work.blk.nonce = 0;
max_nonce = hashes_done;
}
hashes_done = 0;
gettimeofday(&tv_start, NULL);
/* scan nonces for a proof-of-work hash */
switch (opt_algo) {
case ALGO_C:
rc = scanhash_c(thr_id, work.midstate, work.data + 64,
work.hash1, work.hash, work.target,
max_nonce, &hashes_done,
work.blk.nonce);
break;
#ifdef WANT_X8664_SSE2
case ALGO_SSE2_64: {
unsigned int rc5 =
scanhash_sse2_64(thr_id, work.midstate, work.data + 64,
work.hash1, work.hash,
work.target,
max_nonce, &hashes_done,
work.blk.nonce);
rc = (rc5 == -1) ? false : true;
}
break;
#endif
#ifdef WANT_SSE2_4WAY
case ALGO_4WAY: {
unsigned int rc4 =
ScanHash_4WaySSE2(thr_id, work.midstate, work.data + 64,
work.hash1, work.hash,
work.target,
max_nonce, &hashes_done,
work.blk.nonce);
rc = (rc4 == -1) ? false : true;
}
break;
#endif
#ifdef WANT_VIA_PADLOCK
case ALGO_VIA:
rc = scanhash_via(thr_id, work.data, work.target,
max_nonce, &hashes_done,
work.blk.nonce);
break;
#endif
case ALGO_CRYPTOPP:
rc = scanhash_cryptopp(thr_id, work.midstate, work.data + 64,
work.hash1, work.hash, work.target,
max_nonce, &hashes_done,
work.blk.nonce);
break;
#ifdef WANT_CRYPTOPP_ASM32
case ALGO_CRYPTOPP_ASM32:
rc = scanhash_asm32(thr_id, work.midstate, work.data + 64,
work.hash1, work.hash, work.target,
max_nonce, &hashes_done,
work.blk.nonce);
break;
#endif
default:
/* should never happen */
goto out;
}
/* record scanhash elapsed time */
gettimeofday(&tv_end, NULL);
timeval_subtract(&diff, &tv_end, &tv_start);
hashes_done -= work.blk.nonce;
hashmeter(thr_id, &diff, hashes_done);
work.blk.nonce += hashes_done;
/* adjust max_nonce to meet target cycle time */
if (diff.tv_usec > 500000)
diff.tv_sec++;
if (diff.tv_sec && diff.tv_sec != cycle) {
max64 = work.blk.nonce +
((uint64_t)hashes_done * cycle) / diff.tv_sec;
} else
max64 = work.blk.nonce + hashes_done;
if (max64 > 0xfffffffaULL)
max64 = 0xfffffffaULL;
max_nonce = max64;
/* if nonce found, submit work */
if (unlikely(rc)) {
if (opt_debug)
applog(LOG_DEBUG, "CPU %d found something?", dev_from_id(thr_id));
if (unlikely(!submit_work_sync(mythr, &work))) {
applog(LOG_ERR, "Failed to submit_work_sync in miner_thread %d", thr_id);
break;
}
work.blk.nonce += 4;
}
timeval_subtract(&diff, &tv_end, &tv_workstart);
if (!requested && (diff.tv_sec > request_interval || work.blk.nonce > request_nonce)) {
if (unlikely(!queue_request())) {
applog(LOG_ERR, "Failed to queue_request in miner_thread %d", thr_id);
goto out;
}
requested = true;
}
if (diff.tv_sec > opt_scantime || work_restart[thr_id].restart ||
work.blk.nonce >= MAXTHREADS - hashes_done ||
stale_work(&work))
needs_work = true;
}
out:
tq_freeze(mythr->q);
return NULL;
}
enum {
STAT_SLEEP_INTERVAL = 1,
STAT_CTR_INTERVAL = 10000000,
FAILURE_INTERVAL = 30,
};
#ifdef HAVE_OPENCL
static _clState *clStates[16];
static inline cl_int queue_kernel_parameters(_clState *clState, dev_blk_ctx *blk)
{
cl_kernel *kernel = &clState->kernel;
cl_int status = 0;
int num = 0;
status |= clSetKernelArg(*kernel, num++, sizeof(uint), (void *)&blk->ctx_a);
status |= clSetKernelArg(*kernel, num++, sizeof(uint), (void *)&blk->ctx_b);
status |= clSetKernelArg(*kernel, num++, sizeof(uint), (void *)&blk->ctx_c);
status |= clSetKernelArg(*kernel, num++, sizeof(uint), (void *)&blk->ctx_d);
status |= clSetKernelArg(*kernel, num++, sizeof(uint), (void *)&blk->ctx_e);
status |= clSetKernelArg(*kernel, num++, sizeof(uint), (void *)&blk->ctx_f);
status |= clSetKernelArg(*kernel, num++, sizeof(uint), (void *)&blk->ctx_g);
status |= clSetKernelArg(*kernel, num++, sizeof(uint), (void *)&blk->ctx_h);
status |= clSetKernelArg(*kernel, num++, sizeof(uint), (void *)&blk->cty_b);
status |= clSetKernelArg(*kernel, num++, sizeof(uint), (void *)&blk->cty_c);
status |= clSetKernelArg(*kernel, num++, sizeof(uint), (void *)&blk->cty_d);
status |= clSetKernelArg(*kernel, num++, sizeof(uint), (void *)&blk->cty_f);
status |= clSetKernelArg(*kernel, num++, sizeof(uint), (void *)&blk->cty_g);
status |= clSetKernelArg(*kernel, num++, sizeof(uint), (void *)&blk->cty_h);
status |= clSetKernelArg(*kernel, num++, sizeof(uint), (void *)&blk->nonce);
if (clState->hasBitAlign == true) {
/* Parameters for phatk kernel */
status |= clSetKernelArg(*kernel, num++, sizeof(uint), (void *)&blk->W2);
status |= clSetKernelArg(*kernel, num++, sizeof(uint), (void *)&blk->W16);
status |= clSetKernelArg(*kernel, num++, sizeof(uint), (void *)&blk->W17);
status |= clSetKernelArg(*kernel, num++, sizeof(uint), (void *)&blk->PreVal4);
status |= clSetKernelArg(*kernel, num++, sizeof(uint), (void *)&blk->T1);
} else {
/* Parameters for poclbm kernel */
status |= clSetKernelArg(*kernel, num++, sizeof(uint), (void *)&blk->fW0);
status |= clSetKernelArg(*kernel, num++, sizeof(uint), (void *)&blk->fW1);
status |= clSetKernelArg(*kernel, num++, sizeof(uint), (void *)&blk->fW2);
status |= clSetKernelArg(*kernel, num++, sizeof(uint), (void *)&blk->fW3);
status |= clSetKernelArg(*kernel, num++, sizeof(uint), (void *)&blk->fW15);
status |= clSetKernelArg(*kernel, num++, sizeof(uint), (void *)&blk->fW01r);
status |= clSetKernelArg(*kernel, num++, sizeof(uint), (void *)&blk->fcty_e);
status |= clSetKernelArg(*kernel, num++, sizeof(uint), (void *)&blk->fcty_e2);
}
status |= clSetKernelArg(*kernel, num++, sizeof(clState->outputBuffer),
(void *)&clState->outputBuffer);
return status;
}
static void set_threads_hashes(unsigned int vectors, unsigned int *threads,
unsigned int *hashes, size_t *globalThreads)
{
*globalThreads = *threads = 1 << (15 + scan_intensity);
*hashes = *threads * vectors;
}
static void *gpuminer_thread(void *userdata)
{
const unsigned long cycle = opt_log_interval / 5 ? : 1;
struct timeval tv_start, tv_end, diff, tv_workstart;
struct thr_info *mythr = userdata;
const int thr_id = mythr->id;
uint32_t *res, *blank_res;
double gpu_ms_average = 7;
size_t globalThreads[1];
size_t localThreads[1];
cl_int status;
_clState *clState = clStates[thr_id];
const cl_kernel *kernel = &clState->kernel;
struct work *work = malloc(sizeof(struct work));
unsigned int threads = 1 << (15 + scan_intensity);
unsigned const int vectors = clState->preferred_vwidth;
unsigned int hashes = threads * vectors;
unsigned int hashes_done = 0;
/* Request the next work item at 2/3 of the scantime */
unsigned const int request_interval = opt_scantime * 2 / 3 ? : 1;
unsigned const long request_nonce = MAXTHREADS / 3 * 2;
bool requested = true;
pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, NULL);
res = calloc(BUFFERSIZE, 1);
blank_res = calloc(BUFFERSIZE, 1);
if (!res || !blank_res) {
applog(LOG_ERR, "Failed to calloc in gpuminer_thread");
goto out;
}
gettimeofday(&tv_start, NULL);
globalThreads[0] = threads;
localThreads[0] = clState->work_size;
diff.tv_sec = 0;
gettimeofday(&tv_end, NULL);
status = clEnqueueWriteBuffer(clState->commandQueue, clState->outputBuffer, CL_TRUE, 0,
BUFFERSIZE, blank_res, 0, NULL, NULL);
if (unlikely(status != CL_SUCCESS))
{ applog(LOG_ERR, "Error: clEnqueueWriteBuffer failed."); goto out; }
gettimeofday(&tv_workstart, NULL);
/* obtain new work from internal workio thread */
if (unlikely(!get_work(work, requested))) {
applog(LOG_ERR, "work retrieval failed, exiting "
"gpu mining thread %d", mythr->id);
goto out;
}
mythr->cgpu->getworks++;
work->thr_id = thr_id;
requested = false;
precalc_hash(&work->blk, (uint32_t *)(work->midstate), (uint32_t *)(work->data + 64));
work->blk.nonce = 0;
while (1) {
struct timeval tv_gpustart, tv_gpuend;
suseconds_t gpu_us;
gettimeofday(&tv_gpustart, NULL);
timeval_subtract(&diff, &tv_gpustart, &tv_gpuend);
/* This finish flushes the readbuffer set with CL_FALSE later */
clFinish(clState->commandQueue);
gettimeofday(&tv_gpuend, NULL);
timeval_subtract(&diff, &tv_gpuend, &tv_gpustart);
gpu_us = diff.tv_sec * 1000000 + diff.tv_usec;
gpu_ms_average = ((gpu_us / 1000) + gpu_ms_average * 0.9) / 1.9;
if (opt_dynamic) {
/* Try to not let the GPU be out for longer than 6ms, but
* increase intensity when the system is idle, unless
* dynamic is disabled. */
if (gpu_ms_average > 7) {
if (scan_intensity > 0)
scan_intensity--;
set_threads_hashes(vectors, &threads, &hashes, globalThreads);
} else if (gpu_ms_average < 3) {
if (scan_intensity < 14)
scan_intensity++;
set_threads_hashes(vectors, &threads, &hashes, globalThreads);
}
}
if (diff.tv_sec > opt_scantime ||
work->blk.nonce >= MAXTHREADS - hashes ||
work_restart[thr_id].restart ||
stale_work(work)) {
/* Ignore any reads since we're getting new work and queue a clean buffer */
status = clEnqueueWriteBuffer(clState->commandQueue, clState->outputBuffer, CL_FALSE, 0,
BUFFERSIZE, blank_res, 0, NULL, NULL);
if (unlikely(status != CL_SUCCESS))
{ applog(LOG_ERR, "Error: clEnqueueWriteBuffer failed."); goto out; }
memset(res, 0, BUFFERSIZE);
gettimeofday(&tv_workstart, NULL);
/* obtain new work from internal workio thread */
if (unlikely(!get_work(work, requested))) {
applog(LOG_ERR, "work retrieval failed, exiting "
"gpu mining thread %d", mythr->id);
goto out;
}
mythr->cgpu->getworks++;
work->thr_id = thr_id;
requested = false;
precalc_hash(&work->blk, (uint32_t *)(work->midstate), (uint32_t *)(work->data + 64));
work->blk.nonce = 0;
work_restart[thr_id].restart = 0;
if (opt_debug)
applog(LOG_DEBUG, "getwork thread %d", thr_id);
/* Flushes the writebuffer set with CL_FALSE above */
clFinish(clState->commandQueue);
}
status = queue_kernel_parameters(clState, &work->blk);
if (unlikely(status != CL_SUCCESS))
{ applog(LOG_ERR, "Error: clSetKernelArg of all params failed."); goto out; }
/* MAXBUFFERS entry is used as a flag to say nonces exist */
if (res[MAXBUFFERS]) {
/* Clear the buffer again */
status = clEnqueueWriteBuffer(clState->commandQueue, clState->outputBuffer, CL_FALSE, 0,
BUFFERSIZE, blank_res, 0, NULL, NULL);
if (unlikely(status != CL_SUCCESS))
{ applog(LOG_ERR, "Error: clEnqueueWriteBuffer failed."); goto out; }
if (opt_debug)
applog(LOG_DEBUG, "GPU %d found something?", dev_from_id(thr_id));
postcalc_hash_async(mythr, work, res);
memset(res, 0, BUFFERSIZE);
clFinish(clState->commandQueue);
}
status = clEnqueueNDRangeKernel(clState->commandQueue, *kernel, 1, NULL,
globalThreads, localThreads, 0, NULL, NULL);
if (unlikely(status != CL_SUCCESS))
{ applog(LOG_ERR, "Error: Enqueueing kernel onto command queue. (clEnqueueNDRangeKernel)"); goto out; }
status = clEnqueueReadBuffer(clState->commandQueue, clState->outputBuffer, CL_FALSE, 0,
BUFFERSIZE, res, 0, NULL, NULL);
if (unlikely(status != CL_SUCCESS))
{ applog(LOG_ERR, "Error: clEnqueueReadBuffer failed. (clEnqueueReadBuffer)"); goto out;}
gettimeofday(&tv_end, NULL);
timeval_subtract(&diff, &tv_end, &tv_start);
hashes_done += hashes;
work->blk.nonce += hashes;
if (diff.tv_usec > 500000)
diff.tv_sec++;
if (diff.tv_sec >= cycle) {
hashmeter(thr_id, &diff, hashes_done);
gettimeofday(&tv_start, NULL);
hashes_done = 0;
}
timeval_subtract(&diff, &tv_end, &tv_workstart);
if (!requested && (diff.tv_sec > request_interval || work->blk.nonce > request_nonce)) {
if (unlikely(!queue_request())) {
applog(LOG_ERR, "Failed to queue_request in gpuminer_thread %d", thr_id);
goto out;
}
requested = true;
}
}
out:
tq_freeze(mythr->q);
return NULL;
}
#endif /* HAVE_OPENCL */
static void restart_threads(bool longpoll)
{
int i;
/* Discard old queued requests and get new ones */
flush_requests(longpoll);
for (i = 0; i < mining_threads; i++)
work_restart[i].restart = 1;
}
static void *longpoll_thread(void *userdata)
{
struct thr_info *mythr = userdata;
CURL *curl = NULL;
char *copy_start, *hdr_path, *lp_url = NULL;
bool need_slash = false;
int failures = 0;
pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, NULL);
hdr_path = tq_pop(mythr->q, NULL);
if (!hdr_path)
goto out;
/* full URL */
if (strstr(hdr_path, "://")) {
lp_url = hdr_path;
hdr_path = NULL;
}
/* absolute path, on current server */
else {
copy_start = (*hdr_path == '/') ? (hdr_path + 1) : hdr_path;
if (rpc_url[strlen(rpc_url) - 1] != '/')
need_slash = true;
lp_url = malloc(strlen(rpc_url) + strlen(copy_start) + 2);
if (!lp_url)
goto out;
sprintf(lp_url, "%s%s%s", rpc_url, need_slash ? "/" : "", copy_start);
}
applog(LOG_INFO, "Long-polling activated for %s", lp_url);
curl = curl_easy_init();
if (unlikely(!curl)) {
applog(LOG_ERR, "CURL initialisation failed");
goto out;
}
while (1) {
struct timeval start, end;
json_t *val;
gettimeofday(&start, NULL);
val = json_rpc_call(curl, lp_url, rpc_userpass, rpc_req,
false, true);
if (likely(val)) {
failures = 0;
json_decref(val);
/* Keep track of who ordered a restart_threads to make
* sure it's only done once per new block */
if (likely(!strncmp(longpoll_block, blank, 36) ||
!strncmp(longpoll_block, current_block, 36))) {
new_blocks++;
applog(LOG_WARNING, "LONGPOLL detected new block on network, waiting on fresh work");
restart_threads(true);
} else
applog(LOG_WARNING, "LONGPOLL received after new block already detected");
} else {
/* Some pools regularly drop the longpoll request so
* only see this as longpoll failure if it happens
* immediately and just restart it the rest of the
* time. */
gettimeofday(&end, NULL);
if (end.tv_sec - start.tv_sec > 30)
continue;
if (failures++ < 10) {
sleep(30);
applog(LOG_WARNING,
"longpoll failed, sleeping for 30s");
} else {
applog(LOG_ERR,
"longpoll failed, ending thread");
goto out;
}
}
memcpy(longpoll_block, current_block, 36);
}
out:
free(hdr_path);
free(lp_url);
tq_freeze(mythr->q);
if (curl)
curl_easy_cleanup(curl);
return NULL;
}
static void reinit_cputhread(int thr_id)
{
struct thr_info *thr = &thr_info[thr_id];
tq_freeze(thr->q);
if (unlikely(pthread_cancel(thr->pth))) {
applog(LOG_ERR, "Failed to pthread_cancel in reinit_gputhread");
goto failed_out;
}
if (unlikely(pthread_join(thr->pth, NULL))) {
applog(LOG_ERR, "Failed to pthread_join in reinit_gputhread");
goto failed_out;
}
applog(LOG_INFO, "Reinit CPU thread %d", thr_id);
tq_thaw(thr->q);
gettimeofday(&thr->last, NULL);
if (unlikely(pthread_create(&thr->pth, NULL, miner_thread, thr))) {
applog(LOG_ERR, "thread %d create failed", thr_id);
goto failed_out;
}
return;
failed_out:
kill_work();
}
#ifdef HAVE_OPENCL
static void reinit_gputhread(int thr_id)
{
int gpu = dev_from_id(thr_id);
struct thr_info *thr = &thr_info[thr_id];
char name[256];
tq_freeze(thr->q);
if (unlikely(pthread_cancel(thr->pth))) {
applog(LOG_ERR, "Failed to pthread_cancel in reinit_gputhread");
goto failed_out;
}
if (unlikely(pthread_join(thr->pth, NULL))) {
applog(LOG_ERR, "Failed to pthread_join in reinit_gputhread");
goto failed_out;
}
free(clStates[thr_id]);
applog(LOG_INFO, "Reinit GPU thread %d", thr_id);
tq_thaw(thr->q);
clStates[thr_id] = initCl(gpu, name, sizeof(name));
if (!clStates[thr_id]) {
applog(LOG_ERR, "Failed to reinit GPU thread %d", thr_id);
goto failed_out;
}
applog(LOG_INFO, "initCl() finished. Found %s", name);
gettimeofday(&thr->last, NULL);
if (unlikely(pthread_create(&thr->pth, NULL, gpuminer_thread, thr))) {
applog(LOG_ERR, "thread %d create failed", thr_id);
goto failed_out;
}
return;
failed_out:
kill_work();
}
static void reinit_thread(int thr_id)
{
if (thr_id < gpu_threads)
reinit_gputhread(thr_id);
else
reinit_cputhread(thr_id);
}
#else
static void reinit_thread(int thr_id)
{
reinit_cputhread(thr_id);
}
#endif
/* Determine which are the first threads belonging to a device and if they're
* active */
static bool active_device(int thr_id)
{
if (thr_id < gpu_threads) {
if (thr_id >= total_devices)
return false;
if (!gpu_devices[dev_from_id(thr_id)])
return false;
} else if (thr_id > gpu_threads + num_processors)
return false;
return true;
}
/* Makes sure the hashmeter keeps going even if mining threads stall, updates
* the screen at regular intervals, and restarts threads if they appear to have
* died. */
static void *watchdog_thread(void *userdata)
{
const unsigned int interval = opt_log_interval / 2 ? : 1;
struct timeval zero_tv;
pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, NULL);
memset(&zero_tv, 0, sizeof(struct timeval));
while (1) {
int x, y, logx, logy, i;
struct timeval now;
sleep(interval);
if (requests_queued() < opt_queue)
queue_request();
hashmeter(-1, &zero_tv, 0);
if (curses_active) {
pthread_mutex_lock(&curses_lock);
getmaxyx(mainwin, y, x);
getmaxyx(logwin, logy, logx);
y -= logcursor;
/* Detect screen size change */
if (x != logx || y != logy)
wresize(logwin, y, x);
for (i = 0; i < mining_threads; i++) {
if (active_device(i))
curses_print_status(i);
}
redrawwin(logwin);
redrawwin(statuswin);
pthread_mutex_unlock(&curses_lock);
}
if (unlikely(work_restart[stage_thr_id].restart)) {
restart_threads(false);
work_restart[stage_thr_id].restart = 0;
}
gettimeofday(&now, NULL);
#if 0
for (i = 0; i < mining_threads; i++) {
#else
for (i = 0; i < gpu_threads; i++) {
#endif
struct thr_info *thr = &thr_info[i];
/* Do not kill threads waiting on longpoll staged work
* or idle network */
if (now.tv_sec - thr->last.tv_sec > 60 && !idlenet) {
applog(LOG_ERR, "Attempting to restart thread %d, idle for more than 60 seconds", i);
/* Create one mandatory work item */
inc_staged(1, true);
if (unlikely(!queue_request())) {
applog(LOG_ERR, "Failed to queue_request in watchdog_thread");
kill_work();
break;
}
reinit_thread(i);
applog(LOG_WARNING, "Thread %d restarted", i);
}
}
}
return NULL;
}
static void print_summary(void)
{
struct timeval diff;
int hours, mins, secs, i;
double utility, efficiency = 0.0;
timeval_subtract(&diff, &total_tv_end, &total_tv_start);
hours = diff.tv_sec / 3600;
mins = (diff.tv_sec % 3600) / 60;
secs = diff.tv_sec % 60;
utility = accepted / ( total_secs ? total_secs : 1 ) * 60;
efficiency = getwork_requested ? accepted * 100.0 / getwork_requested : 0.0;
printf("\nSummary of runtime statistics:\n\n");
printf("Started at %s\n", datestamp);
printf("Runtime: %d hrs : %d mins : %d secs\n", hours, mins, secs);
if (total_secs)
printf("Average hashrate: %.1f Megahash/s\n", total_mhashes_done / total_secs);
printf("Queued work requests: %d\n", getwork_requested);
printf("Share submissions: %d\n", accepted + rejected);
printf("Accepted shares: %d\n", accepted);
printf("Rejected shares: %d\n", rejected);
if (accepted || rejected)
printf("Reject ratio: %.1f\n", (double)(rejected * 100) / (double)(accepted + rejected));
printf("Hardware errors: %d\n", hw_errors);
printf("Efficiency (accepted / queued): %.0f%%\n", efficiency);
printf("Utility (accepted shares / min): %.2f/min\n\n", utility);
printf("Discarded work due to new blocks: %d\n", discarded_work);
printf("Stale submissions discarded due to new blocks: %d\n", stale_shares);
printf("Unable to get work from server occasions: %d\n", localgen_occasions);
printf("Work items generated locally: %d\n", local_work);
printf("Submitting work remotely delay occasions: %d\n", remotefail_occasions);
printf("New blocks detected on network: %d\n\n", new_blocks);
printf("Summary of per device statistics:\n\n");
for (i = 0; i < mining_threads; i++) {
if (active_device(i))
print_status(i);
}
printf("\n");
}
int main (int argc, char *argv[])
{
unsigned int i, j = 0, x, y;
struct sigaction handler;
struct thr_info *thr;
char name[256];
struct tm tm;
if (unlikely(pthread_mutex_init(&hash_lock, NULL)))
return 1;
if (unlikely(pthread_mutex_init(&qd_lock, NULL)))
return 1;
if (unlikely(pthread_mutex_init(&stgd_lock, NULL)))
return 1;
if (unlikely(pthread_mutex_init(&curses_lock, NULL)))
return 1;
handler.sa_handler = &sighandler;
sigaction(SIGTERM, &handler, &termhandler);
sigaction(SIGINT, &handler, &inthandler);
gettimeofday(&total_tv_start, NULL);
gettimeofday(&total_tv_end, NULL);
localtime_r(&total_tv_start.tv_sec, &tm);
sprintf(datestamp, "[%d-%02d-%02d %02d:%02d:%02d]",
tm.tm_year + 1900,
tm.tm_mon + 1,
tm.tm_mday,
tm.tm_hour,
tm.tm_min,
tm.tm_sec);
for (i = 0; i < 36; i++) {
strcat(blank, "0");
strcat(current_block, "0");
strcat(longpoll_block, "0");
}
#ifdef WIN32
opt_n_threads = num_processors = 1;
#else
num_processors = sysconf(_SC_NPROCESSORS_ONLN);
opt_n_threads = num_processors;
#endif /* !WIN32 */
#ifdef HAVE_OPENCL
for (i = 0; i < 16; i++)
gpu_devices[i] = false;
nDevs = clDevicesNum();
if (nDevs < 0)
return 1;
#endif
if (nDevs)
opt_n_threads = 0;
rpc_url = strdup(DEF_RPC_URL);
/* parse command line */
opt_register_table(opt_config_table,
"Options for both config file and command line");
opt_register_table(opt_cmdline_table,
"Options for command line only");
opt_parse(&argc, argv, applog_and_exit);
if (argc != 1) {
applog(LOG_ERR, "Unexpected extra commandline arguments");
return 1;
}
if (total_devices) {
if (total_devices > nDevs) {
applog(LOG_ERR, "More devices specified than exist");
return 1;
}
for (i = 0; i < 16; i++)
if (gpu_devices[i] && i + 1 > nDevs) {
applog(LOG_ERR, "Command line options set a device that doesn't exist");
return 1;
}
gpu_threads = total_devices * opt_g_threads;
} else {
gpu_threads = nDevs * opt_g_threads;
for (i = 0; i < nDevs; i++)
gpu_devices[i] = true;
total_devices = nDevs;
}
if (!gpu_threads && !forced_n_threads) {
/* Maybe they turned GPU off; restore default CPU threads. */
opt_n_threads = num_processors;
}
logcursor = 6;
mining_threads = opt_n_threads + gpu_threads;
gpucursor = logcursor;
cpucursor = gpucursor + nDevs;
logstart = cpucursor + (opt_n_threads ? num_processors : 0) + 1;
logcursor = logstart + 1;
if (!rpc_userpass) {
if (!rpc_user || !rpc_pass) {
applog(LOG_ERR, "No login credentials supplied");
return 1;
}
rpc_userpass = malloc(strlen(rpc_user) + strlen(rpc_pass) + 2);
if (!rpc_userpass)
return 1;
sprintf(rpc_userpass, "%s:%s", rpc_user, rpc_pass);
}
if (unlikely(curl_global_init(CURL_GLOBAL_ALL)))
return 1;
#ifdef HAVE_SYSLOG_H
if (use_syslog)
openlog("cpuminer", LOG_PID, LOG_USER);
#endif
work_restart = calloc(mining_threads + 4, sizeof(*work_restart));
if (!work_restart)
return 1;
thr_info = calloc(mining_threads + 4, sizeof(*thr));
if (!thr_info)
return 1;
/* init workio thread info */
work_thr_id = mining_threads;
thr = &thr_info[work_thr_id];
thr->id = work_thr_id;
thr->q = tq_new();
if (!thr->q)
return 1;
/* start work I/O thread */
if (pthread_create(&thr->pth, NULL, workio_thread, thr)) {
applog(LOG_ERR, "workio thread create failed");
return 1;
}
/* init longpoll thread info */
if (want_longpoll) {
longpoll_thr_id = mining_threads + 1;
thr = &thr_info[longpoll_thr_id];
thr->id = longpoll_thr_id;
thr->q = tq_new();
if (!thr->q)
return 1;
/* start longpoll thread */
if (unlikely(pthread_create(&thr->pth, NULL, longpoll_thread, thr))) {
applog(LOG_ERR, "longpoll thread create failed");
return 1;
}
pthread_detach(thr->pth);
} else
longpoll_thr_id = -1;
if (opt_n_threads ) {
cpus = calloc(num_processors, sizeof(struct cgpu_info));
if (unlikely(!cpus)) {
applog(LOG_ERR, "Failed to calloc cpus");
return 1;
}
}
if (gpu_threads) {
gpus = calloc(nDevs, sizeof(struct cgpu_info));
if (unlikely(!gpus)) {
applog(LOG_ERR, "Failed to calloc gpus");
return 1;
}
}
stage_thr_id = mining_threads + 3;
thr = &thr_info[stage_thr_id];
thr->q = tq_new();
if (!thr->q)
return 1;
/* start stage thread */
if (pthread_create(&thr->pth, NULL, stage_thread, thr)) {
applog(LOG_ERR, "stage thread create failed");
return 1;
}
/* Flag the work as ready forcing the mining threads to wait till we
* actually put something into the queue */
inc_staged(mining_threads, true);
#ifdef HAVE_OPENCL
i = 0;
/* start GPU mining threads */
for (j = 0; j < nDevs * opt_g_threads; j++) {
int gpu = j % nDevs;
gpus[gpu].is_gpu = 1;
gpus[gpu].cpu_gpu = gpu;
/* Skip devices not set to mine */
if (!gpu_devices[gpu])
continue;
thr = &thr_info[i];
thr->id = i;
thr->cgpu = &gpus[gpu];
thr->q = tq_new();
if (!thr->q) {
applog(LOG_ERR, "tq_new failed in starting gpu mining threads");
return 1;
}
applog(LOG_INFO, "Init GPU thread %i", i);
clStates[i] = initCl(gpu, name, sizeof(name));
if (!clStates[i]) {
applog(LOG_ERR, "Failed to init GPU thread %d", i);
continue;
}
applog(LOG_INFO, "initCl() finished. Found %s", name);
gettimeofday(&thr->last, NULL);
if (unlikely(pthread_create(&thr->pth, NULL, gpuminer_thread, thr))) {
applog(LOG_ERR, "thread %d create failed", i);
return 1;
}
i++;
}
applog(LOG_INFO, "%d gpu miner threads started", gpu_threads);
#endif
/* start CPU mining threads */
for (i = gpu_threads; i < mining_threads; i++) {
int cpu = (i - gpu_threads) % num_processors;
thr = &thr_info[i];
thr->id = i;
cpus[cpu].cpu_gpu = cpu;
thr->cgpu = &cpus[cpu];
thr->q = tq_new();
if (!thr->q) {
applog(LOG_ERR, "tq_new failed in starting cpu mining threads");
return 1;
}
gettimeofday(&thr->last, NULL);
if (unlikely(pthread_create(&thr->pth, NULL, miner_thread, thr))) {
applog(LOG_ERR, "thread %d create failed", i);
return 1;
}
}
applog(LOG_INFO, "%d cpu miner threads started, "
"using SHA256 '%s' algorithm.",
opt_n_threads,
algo_names[opt_algo]);
watchdog_thr_id = mining_threads + 2;
thr = &thr_info[watchdog_thr_id];
/* start wakeup thread */
if (pthread_create(&thr->pth, NULL, watchdog_thread, NULL)) {
applog(LOG_ERR, "wakeup thread create failed");
return 1;
}
/* Restart count as it will be wrong till all threads are started */
pthread_mutex_lock(&hash_lock);
gettimeofday(&total_tv_start, NULL);
gettimeofday(&total_tv_end, NULL);
total_mhashes_done = 0;
pthread_mutex_unlock(&hash_lock);
/* Set up the ncurses interface */
if (!opt_quiet && use_curses) {
mainwin = initscr();
getmaxyx(mainwin, y, x);
statuswin = newwin(logstart, x, 0, 0);
logwin = newwin(y - logcursor, 0, logcursor, 0);
idlok(logwin, true);
scrollok(logwin, true);
leaveok(logwin, true);
leaveok(statuswin, true);
curses_active = true;
for (i = 0; i < mining_threads; i++)
print_status(i);
}
/* Now that everything's ready put enough work in the queue */
for (i = 0; i < opt_queue + mining_threads; i++) {
if (unlikely(!queue_request())) {
applog(LOG_ERR, "Failed to queue_request in main");
return 1;
}
}
/* main loop - simply wait for workio thread to exit */
pthread_join(thr_info[work_thr_id].pth, NULL);
applog(LOG_INFO, "workio thread dead, exiting.");
gettimeofday(&total_tv_end, NULL);
curl_global_cleanup();
disable_curses();
if (!opt_quiet && successful_connect)
print_summary();
if (gpu_threads)
free(gpus);
if (opt_n_threads)
free(cpus);
return 0;
}