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Another Bitlocker boost, reduce shared mem consumption to give some of them to the compiler for more efficient calculating of memory pointer addresses

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This commit is contained in:
Jens Steube 2020-01-02 12:34:19 +01:00
parent 349b3c4673
commit 931e29d333
2 changed files with 54 additions and 110 deletions
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78
OpenCL/m22100-pure.cl
View File

@ -248,31 +248,28 @@ KERNEL_FQ void m22100_loop (KERN_ATTR_TMPS_ESALT (bitlocker_tmp_t, bitlocker_t))
t3[3] = 88 * 8;
/**
* load FIXED_ITER_COUNT full w[] precomputed KE buffers into shared memory since its all static data
* in order for this to work we need to set a fixed loop count to FIXED_ITER_COUNT
* We also need to handle OpenCL and CUDA differently because of:
* ptxas error : Entry function 'm22100_loop' uses too much shared data (0xc004 bytes, 0xc000 max)
* load FIXED_ITER_INCR full w[] precomputed KE buffers into shared memory since its all static data
* in order for this to work we need to set a fixed loop count to FIXED_ITER_TOTAL in module
*/
#ifdef IS_CUDA
#define FIXED_ITER_COUNT 256
#else
#define FIXED_ITER_COUNT 128
#endif
#define FIXED_ITER_TOTAL 1024
#define FIXED_ITER_INCR 8 // seems to be a good trade-off between memory reads and available registers
#ifdef REAL_SHM
LOCAL_VK u32 s_wb_ke_pc[FIXED_ITER_COUNT][48];
LOCAL_VK u32 s_wb_ke_pc[FIXED_ITER_INCR][48];
#else
GLOBAL_AS u32 (*s_wb_ke_pc)[48] = NULL;
#endif
for (u32 t = 0; t < FIXED_ITER_TOTAL; t += FIXED_ITER_INCR)
{
#ifdef REAL_SHM
for (u32 i = lid; i < FIXED_ITER_COUNT; i += lsz)
for (u32 i = lid; i < FIXED_ITER_INCR; i += lsz)
{
for (u32 j = 0; j < 48; j++) // first 16 set to register
{
s_wb_ke_pc[i][j] = esalt_bufs[digests_offset].wb_ke_pc[loop_pos + i][j];
s_wb_ke_pc[i][j] = esalt_bufs[digests_offset].wb_ke_pc[loop_pos + t + i][j];
}
}
@ -280,13 +277,13 @@ KERNEL_FQ void m22100_loop (KERN_ATTR_TMPS_ESALT (bitlocker_tmp_t, bitlocker_t))
#else
s_wb_ke_pc = &esalt_bufs[digests_offset].wb_ke_pc[loop_pos];
s_wb_ke_pc = &esalt_bufs[digests_offset].wb_ke_pc[loop_pos + t];
#endif
// main loop
for (u32 i = 0, j = loop_pos; i < FIXED_ITER_COUNT; i++, j++)
for (u32 i = 0, j = loop_pos + t; i < FIXED_ITER_INCR; i++, j++)
{
u32x digest[8];
@ -314,60 +311,7 @@ KERNEL_FQ void m22100_loop (KERN_ATTR_TMPS_ESALT (bitlocker_tmp_t, bitlocker_t))
w1[2] = digest[6];
w1[3] = digest[7];
}
#ifdef IS_CUDA
// nothing to do
#else
// remaining 128 iterations for non-cuda devices
#ifdef REAL_SHM
for (u32 i = lid; i < FIXED_ITER_COUNT; i += lsz)
{
for (u32 j = 0; j < 48; j++) // first 16 set to register
{
s_wb_ke_pc[i][j] = esalt_bufs[digests_offset].wb_ke_pc[loop_pos + 128 + i][j];
}
}
SYNC_THREADS ();
#else
s_wb_ke_pc = &esalt_bufs[digests_offset].wb_ke_pc[loop_pos + 128];
#endif
// main loop
for (u32 i = 0, j = loop_pos + 128; i < FIXED_ITER_COUNT; i++, j++)
{
u32x digest[8];
digest[0] = SHA256M_A;
digest[1] = SHA256M_B;
digest[2] = SHA256M_C;
digest[3] = SHA256M_D;
digest[4] = SHA256M_E;
digest[5] = SHA256M_F;
digest[6] = SHA256M_G;
digest[7] = SHA256M_H;
sha256_transform_vector (w0, w1, w2, w3, digest);
t1[0] = hc_swap32_S (j); // only moving part
sha256_transform_vector_pc (t0, t1, t2, t3, digest, s_wb_ke_pc[i]);
w0[0] = digest[0];
w0[1] = digest[1];
w0[2] = digest[2];
w0[3] = digest[3];
w1[0] = digest[4];
w1[1] = digest[5];
w1[2] = digest[6];
w1[3] = digest[7];
}
#endif
unpackv (tmps, last_hash, gid, 0, w0[0]);
unpackv (tmps, last_hash, gid, 1, w0[1]);

4
src/modules/module_22100.c
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@ -80,14 +80,14 @@ u64 module_tmp_size (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED c
u32 module_kernel_loops_min (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra)
{
const u32 kernel_loops_min = 256;
const u32 kernel_loops_min = 1024;
return kernel_loops_min;
}
u32 module_kernel_loops_max (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra)
{
const u32 kernel_loops_max = 256;
const u32 kernel_loops_max = 1024;
return kernel_loops_max;
}