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radeonsi: add max waves / SIMD to shader stats (v2) 

v2: account for LDS usage in PS
    the limit is per SIMD, not per CU

Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
This commit is contained in:
Marek Olšák 2016-01-20 01:32:05 +01:00
parent 5944f3d2fc
commit ce1e7784d0
1 changed files with 49 additions and 5 deletions
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54
src/gallium/drivers/radeonsi/si_shader.c
View File

@ -4001,22 +4001,65 @@ static void si_shader_dump_disassembly(const struct radeon_shader_binary *binary
static void si_shader_dump_stats(struct si_screen *sscreen,
struct si_shader_config *conf,
unsigned num_inputs,
unsigned code_size,
struct pipe_debug_callback *debug,
unsigned processor)
{
unsigned lds_increment = sscreen->b.chip_class >= CIK ? 512 : 256;
unsigned lds_per_wave = 0;
unsigned max_simd_waves = 10;
/* Compute LDS usage for PS. */
if (processor == TGSI_PROCESSOR_FRAGMENT) {
/* The minimum usage per wave is (num_inputs * 36). The maximum
* usage is (num_inputs * 36 * 16).
* We can get anything in between and it varies between waves.
*
* Other stages don't know the size at compile time or don't
* allocate LDS per wave, but instead they do it per thread group.
*/
lds_per_wave = conf->lds_size * lds_increment +
align(num_inputs * 36, lds_increment);
}
/* Compute the per-SIMD wave counts. */
if (conf->num_sgprs) {
if (sscreen->b.chip_class >= VI)
max_simd_waves = MIN2(max_simd_waves, 800 / conf->num_sgprs);
else
max_simd_waves = MIN2(max_simd_waves, 512 / conf->num_sgprs);
}
if (conf->num_vgprs)
max_simd_waves = MIN2(max_simd_waves, 256 / conf->num_vgprs);
/* LDS is 64KB per CU (4 SIMDs), divided into 16KB blocks per SIMD
* that PS can use.
*/
if (lds_per_wave)
max_simd_waves = MIN2(max_simd_waves, 16384 / lds_per_wave);
if (r600_can_dump_shader(&sscreen->b, processor)) {
fprintf(stderr, "*** SHADER STATS ***\n"
"SGPRS: %d\nVGPRS: %d\nCode Size: %d bytes\nLDS: %d blocks\n"
"Scratch: %d bytes per wave\n********************\n",
"SGPRS: %d\n"
"VGPRS: %d\n"
"Code Size: %d bytes\n"
"LDS: %d blocks\n"
"Scratch: %d bytes per wave\n"
"Max Waves: %d\n"
"********************\n",
conf->num_sgprs, conf->num_vgprs, code_size,
conf->lds_size, conf->scratch_bytes_per_wave);
conf->lds_size, conf->scratch_bytes_per_wave,
max_simd_waves);
}
pipe_debug_message(debug, SHADER_INFO,
"Shader Stats: SGPRS: %d VGPRS: %d Code Size: %d LDS: %d Scratch: %d",
"Shader Stats: SGPRS: %d VGPRS: %d Code Size: %d "
"LDS: %d Scratch: %d Max Waves: %d",
conf->num_sgprs, conf->num_vgprs, code_size,
conf->lds_size, conf->scratch_bytes_per_wave);
conf->lds_size, conf->scratch_bytes_per_wave,
max_simd_waves);
}
void si_shader_dump(struct si_screen *sscreen, struct si_shader *shader,
@ -4027,6 +4070,7 @@ void si_shader_dump(struct si_screen *sscreen, struct si_shader *shader,
si_shader_dump_disassembly(&shader->binary, debug);
si_shader_dump_stats(sscreen, &shader->config,
shader->selector->info.num_inputs,
shader->binary.code_size, debug, processor);
}