From f192741ddd8e35cc489c25269fb7cbe805bd8aad Mon Sep 17 00:00:00 2001 From: Kenneth Graunke Date: Mon, 9 Sep 2019 18:31:41 -0700 Subject: [PATCH] intel/compiler: Report the number of non-spill/fill SEND messages This can be useful to measure whether memory access optimizations are having the desired effect. For example, we might see a reduction in image loads/stores, or constant buffer loads. We can already see this in cycle estimates to some extent, but this is a more direct approach, minus a lot of the noise of random scheduler shuffling. Reviewed-by: Jason Ekstrand --- src/intel/compiler/brw_fs_generator.cpp | 35 +++++++++++++++++++++---- 1 file changed, 30 insertions(+), 5 deletions(-) diff --git a/src/intel/compiler/brw_fs_generator.cpp b/src/intel/compiler/brw_fs_generator.cpp index 70b431d93c7..036aa58cc7c 100644 --- a/src/intel/compiler/brw_fs_generator.cpp +++ b/src/intel/compiler/brw_fs_generator.cpp @@ -1702,8 +1702,15 @@ fs_generator::generate_code(const cfg_t *cfg, int dispatch_width, this->dispatch_width = dispatch_width; int start_offset = p->next_insn_offset; + + /* `send_count` explicitly does not include spills or fills, as we'd + * like to use it as a metric for intentional memory access or other + * shared function use. Otherwise, subtle changes to scheduling or + * register allocation could cause it to fluctuate wildly - and that + * effect is already counted in spill/fill counts. + */ int spill_count = 0, fill_count = 0; - int loop_count = 0; + int loop_count = 0, send_count = 0; struct disasm_info *disasm_info = disasm_initialize(devinfo, cfg); @@ -2017,6 +2024,7 @@ fs_generator::generate_code(const cfg_t *cfg, int dispatch_width, brw_math_function(inst->opcode), inst->base_mrf, src[0], BRW_MATH_PRECISION_FULL); + send_count++; } break; case SHADER_OPCODE_INT_QUOTIENT: @@ -2034,6 +2042,7 @@ fs_generator::generate_code(const cfg_t *cfg, int dispatch_width, gen4_math(p, dst, brw_math_function(inst->opcode), inst->base_mrf, src[0], BRW_MATH_PRECISION_FULL); + send_count++; } break; case FS_OPCODE_LINTERP: @@ -2053,10 +2062,12 @@ fs_generator::generate_code(const cfg_t *cfg, int dispatch_width, case SHADER_OPCODE_SEND: generate_send(inst, dst, src[0], src[1], src[2], inst->ex_mlen > 0 ? src[3] : brw_null_reg()); + send_count++; break; case SHADER_OPCODE_GET_BUFFER_SIZE: generate_get_buffer_size(inst, dst, src[0], src[1]); + send_count++; break; case SHADER_OPCODE_TEX: case FS_OPCODE_TXB: @@ -2070,6 +2081,7 @@ fs_generator::generate_code(const cfg_t *cfg, int dispatch_width, case SHADER_OPCODE_SAMPLEINFO: assert(inst->src[0].file == BAD_FILE); generate_tex(inst, dst, src[1], src[2]); + send_count++; break; case FS_OPCODE_DDX_COARSE: @@ -2103,6 +2115,7 @@ fs_generator::generate_code(const cfg_t *cfg, int dispatch_width, case SHADER_OPCODE_URB_READ_SIMD8: case SHADER_OPCODE_URB_READ_SIMD8_PER_SLOT: generate_urb_read(inst, dst, src[0]); + send_count++; break; case SHADER_OPCODE_URB_WRITE_SIMD8: @@ -2110,29 +2123,35 @@ fs_generator::generate_code(const cfg_t *cfg, int dispatch_width, case SHADER_OPCODE_URB_WRITE_SIMD8_MASKED: case SHADER_OPCODE_URB_WRITE_SIMD8_MASKED_PER_SLOT: generate_urb_write(inst, src[0]); + send_count++; break; case FS_OPCODE_UNIFORM_PULL_CONSTANT_LOAD: assert(inst->force_writemask_all); generate_uniform_pull_constant_load(inst, dst, src[0], src[1]); + send_count++; break; case FS_OPCODE_UNIFORM_PULL_CONSTANT_LOAD_GEN7: assert(inst->force_writemask_all); generate_uniform_pull_constant_load_gen7(inst, dst, src[0], src[1]); + send_count++; break; case FS_OPCODE_VARYING_PULL_CONSTANT_LOAD_GEN4: generate_varying_pull_constant_load_gen4(inst, dst, src[0]); + send_count++; break; case FS_OPCODE_REP_FB_WRITE: case FS_OPCODE_FB_WRITE: generate_fb_write(inst, src[0]); + send_count++; break; case FS_OPCODE_FB_READ: generate_fb_read(inst, dst, src[0]); + send_count++; break; case FS_OPCODE_DISCARD_JUMP: @@ -2147,6 +2166,7 @@ fs_generator::generate_code(const cfg_t *cfg, int dispatch_width, assert(src[1].file == BRW_IMMEDIATE_VALUE); assert(src[2].file == BRW_IMMEDIATE_VALUE); brw_memory_fence(p, dst, src[0], BRW_OPCODE_SEND, src[1].ud, src[2].ud); + send_count++; break; case SHADER_OPCODE_INTERLOCK: @@ -2260,24 +2280,29 @@ fs_generator::generate_code(const cfg_t *cfg, int dispatch_width, case FS_OPCODE_INTERPOLATE_AT_SAMPLE: generate_pixel_interpolator_query(inst, dst, src[0], src[1], GEN7_PIXEL_INTERPOLATOR_LOC_SAMPLE); + send_count++; break; case FS_OPCODE_INTERPOLATE_AT_SHARED_OFFSET: generate_pixel_interpolator_query(inst, dst, src[0], src[1], GEN7_PIXEL_INTERPOLATOR_LOC_SHARED_OFFSET); + send_count++; break; case FS_OPCODE_INTERPOLATE_AT_PER_SLOT_OFFSET: generate_pixel_interpolator_query(inst, dst, src[0], src[1], GEN7_PIXEL_INTERPOLATOR_LOC_PER_SLOT_OFFSET); + send_count++; break; case CS_OPCODE_CS_TERMINATE: generate_cs_terminate(inst, src[0]); + send_count++; break; case SHADER_OPCODE_BARRIER: generate_barrier(inst, src[0]); + send_count++; break; case BRW_OPCODE_DIM: @@ -2360,14 +2385,14 @@ fs_generator::generate_code(const cfg_t *cfg, int dispatch_width, fprintf(stderr, "Native code for %s (sha1 %s)\n" "SIMD%d shader: %d instructions. %d loops. %u cycles. " - "%d:%d spills:fills. " + "%d:%d spills:fills, %u sends, " "scheduled with mode %s. " "Promoted %u constants. " "Compacted %d to %d bytes (%.0f%%)\n", shader_name, sha1buf, dispatch_width, before_size / 16, loop_count, cfg->cycle_count, - spill_count, fill_count, + spill_count, fill_count, send_count, shader_stats.scheduler_mode, shader_stats.promoted_constants, before_size, after_size, @@ -2385,14 +2410,14 @@ fs_generator::generate_code(const cfg_t *cfg, int dispatch_width, compiler->shader_debug_log(log_data, "%s SIMD%d shader: %d inst, %d loops, %u cycles, " - "%d:%d spills:fills, " + "%d:%d spills:fills, %u sends, " "scheduled with mode %s, " "Promoted %u constants, " "compacted %d to %d bytes.", _mesa_shader_stage_to_abbrev(stage), dispatch_width, before_size / 16, loop_count, cfg->cycle_count, - spill_count, fill_count, + spill_count, fill_count, send_count, shader_stats.scheduler_mode, shader_stats.promoted_constants, before_size, after_size); -- 2.30.2