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aco: Consider maximum number of workgroups per CU/WGP on Navi.

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No Fossil DB changes.

Signed-off-by: Timur Kristóf <timur.kristof@gmail.com>
Reviewed-by: Daniel Schürmann <daniel@schuermann.dev>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12517>
This commit is contained in:
Timur Kristóf 2021-08-24 08:57:39 +02:00 committed by Marge Bot
parent c8698199a1
commit 589ccf3d77
1 changed files with 3 additions and 3 deletions
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6
src/amd/compiler/aco_live_var_analysis.cpp
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@ -355,6 +355,7 @@ update_vgpr_sgpr_demand(Program* program, const RegisterDemand new_demand)
unsigned max_waves_per_simd = program->dev.max_wave64_per_simd * (64 / program->wave_size);
unsigned simd_per_cu_wgp = program->dev.simd_per_cu * (program->wgp_mode ? 2 : 1);
unsigned lds_limit = program->wgp_mode ? program->dev.lds_limit * 2 : program->dev.lds_limit;
unsigned max_workgroups_per_cu_wgp = program->wgp_mode ? 32 : 16;
assert(program->min_waves >= 1);
uint16_t sgpr_limit = get_addr_sgpr_from_waves(program, program->min_waves);
@ -394,9 +395,8 @@ update_vgpr_sgpr_demand(Program* program, const RegisterDemand new_demand)
if (lds_per_workgroup)
workgroups_per_cu_wgp = std::min(workgroups_per_cu_wgp, lds_limit / lds_per_workgroup);
if (waves_per_workgroup > 1 && program->chip_class < GFX10)
workgroups_per_cu_wgp = std::min(
workgroups_per_cu_wgp, 16u); /* TODO: is this a SI-only limit? what about Navi? */
if (waves_per_workgroup > 1)
workgroups_per_cu_wgp = std::min(workgroups_per_cu_wgp, max_workgroups_per_cu_wgp);
/* in cases like waves_per_workgroup=3 or lds=65536 and
* waves_per_workgroup=1, we want the maximum possible number of waves per