From: Joshua Aberback <[email protected]> [Why] We used this change to investigate the performance of bandwidth validation, it will be useful to have if we need to investigate further.
[How] We use performance counter tick numbers to profile performance, they live at dc->debug.bw_val_profile (set .enable in debugger to turn on measuring). Change-Id: I828306882837c77c92a66f5c2b9d2de296685416 Signed-off-by: Joshua Aberback <[email protected]> Reviewed-by: Tony Cheng <[email protected]> Acked-by: Bhawanpreet Lakha <Bhawanpreet [email protected]> --- .../gpu/drm/amd/display/dc/calcs/dcn_calcs.c | 18 +++++++ drivers/gpu/drm/amd/display/dc/dc.h | 52 +++++++++++++++++++ 2 files changed, 70 insertions(+) diff --git a/drivers/gpu/drm/amd/display/dc/calcs/dcn_calcs.c b/drivers/gpu/drm/amd/display/dc/calcs/dcn_calcs.c index d7aece82e4fe..1b4b51657f5e 100644 --- a/drivers/gpu/drm/amd/display/dc/calcs/dcn_calcs.c +++ b/drivers/gpu/drm/amd/display/dc/calcs/dcn_calcs.c @@ -704,6 +704,12 @@ bool dcn_validate_bandwidth( struct dc_state *context, bool fast_validate) { + /* + * we want a breakdown of the various stages of validation, which the + * perf_trace macro doesn't support + */ + BW_VAL_TRACE_SETUP(); + const struct resource_pool *pool = dc->res_pool; struct dcn_bw_internal_vars *v = &context->dcn_bw_vars; int i, input_idx; @@ -712,6 +718,9 @@ bool dcn_validate_bandwidth( float bw_limit; PERFORMANCE_TRACE_START(); + + BW_VAL_TRACE_COUNT(); + if (dcn_bw_apply_registry_override(dc)) dcn_bw_sync_calcs_and_dml(dc); @@ -1014,6 +1023,8 @@ bool dcn_validate_bandwidth( mode_support_and_system_configuration(v); } + BW_VAL_TRACE_END_VOLTAGE_LEVEL(); + if (v->voltage_level != number_of_states_plus_one && !fast_validate) { float bw_consumed = v->total_bandwidth_consumed_gbyte_per_second; @@ -1089,6 +1100,8 @@ bool dcn_validate_bandwidth( break; } + BW_VAL_TRACE_END_WATERMARKS(); + for (i = 0, input_idx = 0; i < pool->pipe_count; i++) { struct pipe_ctx *pipe = &context->res_ctx.pipe_ctx[i]; @@ -1179,6 +1192,10 @@ bool dcn_validate_bandwidth( input_idx++; } + } else if (v->voltage_level == number_of_states_plus_one) { + BW_VAL_TRACE_SKIP(fail); + } else if (fast_validate) { + BW_VAL_TRACE_SKIP(fast); } if (v->voltage_level == 0) { @@ -1198,6 +1215,7 @@ bool dcn_validate_bandwidth( kernel_fpu_end(); PERFORMANCE_TRACE_END(); + BW_VAL_TRACE_FINISH(); if (bw_limit_pass && v->voltage_level != 5) return true; diff --git a/drivers/gpu/drm/amd/display/dc/dc.h b/drivers/gpu/drm/amd/display/dc/dc.h index 72bebd7523b8..55577e23f18e 100644 --- a/drivers/gpu/drm/amd/display/dc/dc.h +++ b/drivers/gpu/drm/amd/display/dc/dc.h @@ -249,6 +249,57 @@ struct dc_clocks { bool p_state_change_support; }; +struct dc_bw_validation_profile { + bool enable; + + unsigned long long total_ticks; + unsigned long long voltage_level_ticks; + unsigned long long watermark_ticks; + unsigned long long rq_dlg_ticks; + + unsigned long long total_count; + unsigned long long skip_fast_count; + unsigned long long skip_pass_count; + unsigned long long skip_fail_count; +}; + +#define BW_VAL_TRACE_SETUP() \ + unsigned long long end_tick = 0; \ + unsigned long long voltage_level_tick = 0; \ + unsigned long long watermark_tick = 0; \ + unsigned long long start_tick = dc->debug.bw_val_profile.enable ? \ + dm_get_timestamp(dc->ctx) : 0 + +#define BW_VAL_TRACE_COUNT() \ + if (dc->debug.bw_val_profile.enable) \ + dc->debug.bw_val_profile.total_count++ + +#define BW_VAL_TRACE_SKIP(status) \ + if (dc->debug.bw_val_profile.enable) { \ + if (!voltage_level_tick) \ + voltage_level_tick = dm_get_timestamp(dc->ctx); \ + dc->debug.bw_val_profile.skip_ ## status ## _count++; \ + } + +#define BW_VAL_TRACE_END_VOLTAGE_LEVEL() \ + if (dc->debug.bw_val_profile.enable) \ + voltage_level_tick = dm_get_timestamp(dc->ctx) + +#define BW_VAL_TRACE_END_WATERMARKS() \ + if (dc->debug.bw_val_profile.enable) \ + watermark_tick = dm_get_timestamp(dc->ctx) + +#define BW_VAL_TRACE_FINISH() \ + if (dc->debug.bw_val_profile.enable) { \ + end_tick = dm_get_timestamp(dc->ctx); \ + dc->debug.bw_val_profile.total_ticks += end_tick - start_tick; \ + dc->debug.bw_val_profile.voltage_level_ticks += voltage_level_tick - start_tick; \ + if (watermark_tick) { \ + dc->debug.bw_val_profile.watermark_ticks += watermark_tick - voltage_level_tick; \ + dc->debug.bw_val_profile.rq_dlg_ticks += end_tick - watermark_tick; \ + } \ + } + struct dc_debug_options { enum visual_confirm visual_confirm; bool sanity_checks; @@ -302,6 +353,7 @@ struct dc_debug_options { unsigned int force_odm_combine; //bit vector based on otg inst unsigned int force_fclk_khz; bool disable_tri_buf; + struct dc_bw_validation_profile bw_val_profile; }; struct dc_debug_data { -- 2.17.1 _______________________________________________ amd-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/amd-gfx
