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Reinstitute MAX_INTENSITY=42, but this time with a note in SCRYPT-README.

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Noel Maersk 2013-12-03 21:14:25 +02:00
parent 4bc93fbf8b
commit 16730ed90e
2 changed files with 20 additions and 21 deletions
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37
SCRYPT-README
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@ -47,30 +47,29 @@ setx GPU_USE_SYNC_OBJECTS 1
--intensity XX (-I XX)
Just like in bitcoin mining, scrypt mining takes an intensity, however the
scale goes from 0 to 20 to mimic the "Aggression" used in mtrlt's reaper. The
reason this is crucial is that too high an intensity can actually be
disastrous with scrypt because it CAN run out of ram. High intensities
start writing over the same ram and it is highly dependent on the GPU, but
they
can start actually DECREASING your hashrate, or even worse, start producing
garbage with HW errors skyrocketing. Note that if you do NOT specify an
intensity, cgminer uses dynamic mode which is designed to minimise the harm
to a running desktop and performance WILL be poor. The lower limit to intensity
with scrypt is usually 8 and cgminer will prevent it going too low.
The scale goes from 0 to 42. The reason this is crucial is that too
high an intensity can actually be disastrous with scrypt because it CAN
run out of ram. High intensities start writing over the same ram and it
is highly dependent on the GPU, but they can start actually DECREASING
your hashrate, or even worse, start producing garbage with HW errors
skyrocketing, or locking up the system altogether. Note that if you do
NOT specify an intensity, cgminer uses dynamic mode which is designed
to minimise the harm to a running desktop and performance WILL be poor.
The lower limit to intensity with scrypt is usually 8 and cgminer will
prevent it going too low.
SUMMARY: Setting this for reasonable hashrates is mandatory.
--shaders XXX
is a new option where you tell cgminer how many shaders your GPU has. This
helps cgminer try to choose some meaningful baseline parameters. Use this table
below to determine how many shaders your GPU has, and note that there are some
variants of these cards, and nvidia shaders are much much lower and virtually
pointless trying to mine on. If this is not set, cgminer will query the
device for how much memory it supports and will try to set a value based on
that.
is an option where you tell cgminer how many shaders your GPU has. This
helps cgminer try to choose some meaningful baseline parameters. Use
this table below to determine how many shaders your GPU has, and note
that there are some variants of these cards, and nvidia shaders are much
much lower and virtually pointless trying to mine on. If this is not
set, cgminer will query the device for how much memory it supports and
will try to set a value based on that.
SUMMARY: This will get you started but fine tuning for optimal performance is
required.
required. Using --thread-concurrency is recommended instead.
GPU Shaders
7750 512

4
miner.h
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@ -1049,8 +1049,8 @@ extern bool add_pool_details(struct pool *pool, bool live, char *url, char *user
#define MIN_INTENSITY 8
#define MIN_INTENSITY_STR "8"
#define MAX_INTENSITY 20
#define MAX_INTENSITY_STR "20"
#define MAX_INTENSITY 42
#define MAX_INTENSITY_STR "42"
extern bool hotplug_mode;
extern int hotplug_time;