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Balancing the workload turns out to be very efficient

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This commit is contained in:
jsteube 2016-05-12 09:24:20 +02:00
parent aefd3b03a3
commit dca9683b3b
1 changed files with 14 additions and 22 deletions
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36
src/hashcat.c
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@ -2914,32 +2914,24 @@ static void autotune (hc_device_param_t *device_param)
}
}
// sometimes we're in a bad situation that the algorithm is so slow that we can not
// create enough kernel_accel to do both, keep the gpu busy and stay below target_ms.
// however, we need to have a minimum kernel_accel and kernel_loops of 32.
// luckily, at this level of workload, it became a linear function
// balancing the workload turns out to be very efficient
if (kernel_accel < 32 || kernel_loops < 32)
const u32 kernel_power_balance = kernel_accel * kernel_loops;
u32 sqrtv;
for (sqrtv = 1; sqrtv < 0x100000; sqrtv++)
{
const u32 kernel_power = kernel_accel * kernel_loops;
if ((sqrtv * sqrtv) >= kernel_power_balance) break;
}
// find sqrt
const u32 kernel_accel_try = sqrtv;
const u32 kernel_loops_try = sqrtv;
u32 sqrtv;
for (sqrtv = 1; sqrtv < 0x100000; sqrtv++)
{
if ((sqrtv * sqrtv) >= kernel_power) break;
}
const u32 kernel_accel_try = sqrtv;
const u32 kernel_loops_try = sqrtv;
if ((kernel_accel_try <= kernel_accel_max) && (kernel_loops_try >= kernel_loops_min))
{
kernel_accel = kernel_accel_try;
kernel_loops = kernel_loops_try;
}
if ((kernel_accel_try <= kernel_accel_max) && (kernel_loops_try >= kernel_loops_min))
{
kernel_accel = kernel_accel_try;
kernel_loops = kernel_loops_try;
}
// reset fake words