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Cache as much of the gbt coinbase as possible to avoid doing unnecessary hex2bin conversion on every work generation with gbt.

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This commit is contained in:
Con Kolivas 2013-08-12 01:15:22 +10:00
parent a1052188fd
commit fb94dfa098
2 changed files with 24 additions and 28 deletions
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50
cgminer.c
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@ -1565,33 +1565,6 @@ void free_work(struct work *work)
free(work);
}
/* Generate a GBT coinbase from the existing GBT variables stored. Must be
* entered under gbt_lock */
static void __build_gbt_coinbase(struct pool *pool)
{
unsigned char *coinbase;
int cbt_len, orig_len;
uint8_t *extra_len;
size_t cal_len;
cbt_len = strlen(pool->coinbasetxn) / 2;
pool->coinbase_len = cbt_len + 4;
/* We add 4 bytes of extra data corresponding to nonce2 of stratum */
cal_len = pool->coinbase_len + 1;
align_len(&cal_len);
coinbase = calloc(cal_len, 1);
hex2bin(coinbase, pool->coinbasetxn, 42);
extra_len = (uint8_t *)(coinbase + 41);
orig_len = *extra_len;
hex2bin(coinbase + 42, pool->coinbasetxn + 84, orig_len);
memcpy(coinbase + 42 + orig_len, &pool->nonce2, 4);
*extra_len += 4;
hex2bin(coinbase + 42 + *extra_len, pool->coinbasetxn + 84 + (orig_len * 2), cbt_len - orig_len - 42);
pool->nonce2++;
free(pool->gbt_coinbase);
pool->gbt_coinbase = coinbase;
}
static void gen_hash(unsigned char *data, unsigned char *hash, int len);
/* Process transactions with GBT by storing the binary value of the first
@ -1725,7 +1698,8 @@ static void gen_gbt_work(struct pool *pool, struct work *work)
update_gbt(pool);
cg_wlock(&pool->gbt_lock);
__build_gbt_coinbase(pool);
memcpy(pool->gbt_coinbase + 42 + pool->orig_len, &pool->nonce2, 4);
pool->nonce2++;
cg_dwlock(&pool->gbt_lock);
merkleroot = __gbt_merkleroot(pool);
@ -1784,6 +1758,9 @@ static bool gbt_decode(struct pool *pool, json_t *res_val)
bool submitold;
const char *bits;
const char *workid;
int cbt_len;
uint8_t *extra_len;
size_t cal_len;
previousblockhash = json_string_value(json_object_get(res_val, "previousblockhash"));
target = json_string_value(json_object_get(res_val, "target"));
@ -1817,6 +1794,23 @@ static bool gbt_decode(struct pool *pool, json_t *res_val)
cg_wlock(&pool->gbt_lock);
free(pool->coinbasetxn);
pool->coinbasetxn = strdup(coinbasetxn);
cbt_len = strlen(pool->coinbasetxn) / 2;
pool->coinbase_len = cbt_len + 4;
/* We add 4 bytes of extra data corresponding to nonce2 of stratum */
cal_len = pool->coinbase_len + 1;
align_len(&cal_len);
free(pool->gbt_coinbase);
pool->gbt_coinbase = calloc(cal_len, 1);
if (unlikely(!pool->gbt_coinbase))
quit(1, "Failed to calloc pool gbt_coinbase in gbt_decode");
hex2bin(pool->gbt_coinbase, pool->coinbasetxn, 42);
extra_len = (uint8_t *)(pool->gbt_coinbase + 41);
pool->orig_len = *extra_len;
hex2bin(pool->gbt_coinbase + 42, pool->coinbasetxn + 84, pool->orig_len);
*extra_len += 4;
hex2bin(pool->gbt_coinbase + 42 + *extra_len, pool->coinbasetxn + 84 + (pool->orig_len * 2),
cbt_len - pool->orig_len - 42);
free(pool->longpollid);
pool->longpollid = strdup(longpollid);
free(pool->gbt_workid);

2
miner.h
View File

@ -1207,6 +1207,8 @@ struct pool {
unsigned char *txn_hashes;
int gbt_txns;
int coinbase_len;
int orig_len;
struct timeval tv_lastwork;
};