radv: add radv_shader_dump_stats() helper

To dump the shader stats when a hang is detected.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>

1 files changed, 70 insertions, 0 deletions

diff --git a/src/amd/vulkan/radv_shader.c b/src/amd/vulkan/radv_shader.c
index 87deb7c3ab..ca0ad2d575 100644
--- a/src/amd/vulkan/radv_shader.c
+++ b/src/amd/vulkan/radv_shader.c
@@ -531,3 +531,73 @@ radv_get_shader_name(struct radv_shader_variant *var, gl_shader_stage stage)
 	};
 }
 
+void
+radv_shader_dump_stats(struct radv_device *device,
+		       struct radv_shader_variant *variant,
+		       gl_shader_stage stage,
+		       FILE *file)
+{
+	unsigned lds_increment = device->physical_device->rad_info.chip_class >= CIK ? 512 : 256;
+	struct ac_shader_config *conf;
+	unsigned max_simd_waves;
+	unsigned lds_per_wave = 0;
+
+	switch (device->physical_device->rad_info.family) {
+	/* These always have 8 waves: */
+	case CHIP_POLARIS10:
+	case CHIP_POLARIS11:
+	case CHIP_POLARIS12:
+		max_simd_waves = 8;
+		break;
+	default:
+		max_simd_waves = 10;
+	}
+
+	conf = &variant->config;
+
+	if (stage == MESA_SHADER_FRAGMENT) {
+		lds_per_wave = conf->lds_size * lds_increment +
+			       align(variant->info.fs.num_interp * 48,
+				     lds_increment);
+	}
+
+	if (conf->num_sgprs) {
+		if (device->physical_device->rad_info.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);
+
+	fprintf(file, "\n%s:\n", radv_get_shader_name(variant, stage));
+
+	if (stage == MESA_SHADER_FRAGMENT) {
+		fprintf(file, "*** SHADER CONFIG ***\n"
+			"SPI_PS_INPUT_ADDR = 0x%04x\n"
+			"SPI_PS_INPUT_ENA  = 0x%04x\n",
+			conf->spi_ps_input_addr, conf->spi_ps_input_ena);
+	}
+
+	fprintf(file, "*** SHADER STATS ***\n"
+		"SGPRS: %d\n"
+		"VGPRS: %d\n"
+		"Spilled SGPRs: %d\n"
+		"Spilled VGPRs: %d\n"
+		"Code Size: %d bytes\n"
+		"LDS: %d blocks\n"
+		"Scratch: %d bytes per wave\n"
+		"Max Waves: %d\n"
+		"********************\n\n\n",
+		conf->num_sgprs, conf->num_vgprs,
+		conf->spilled_sgprs, conf->spilled_vgprs, variant->code_size,
+		conf->lds_size, conf->scratch_bytes_per_wave,
+		max_simd_waves);
+}