Mesa (master): radeonsi: add memory management stress tests for GDS

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Module: Mesa
Branch: master
Commit: 075fd5d8f27ff71e89eabb089d74a266476e1bf0
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=075fd5d8f27ff71e89eabb089d74a266476e1bf0

Author: Marek Olšák <marek.olsak at amd.com>
Date:   Mon Nov 26 20:55:26 2018 -0500

radeonsi: add memory management stress tests for GDS

Reviewed-by: Bas Nieuwenhuizen <bas at basnieuwenhuizen.nl>

---

 src/gallium/drivers/radeonsi/si_pipe.c | 46 ++++++++++++++++++++++++++++++++++
 src/gallium/drivers/radeonsi/si_pipe.h |  2 ++
 2 files changed, 48 insertions(+)

diff --git a/src/gallium/drivers/radeonsi/si_pipe.c b/src/gallium/drivers/radeonsi/si_pipe.c
index 9080de1cec..503d833190 100644
--- a/src/gallium/drivers/radeonsi/si_pipe.c
+++ b/src/gallium/drivers/radeonsi/si_pipe.c
@@ -103,6 +103,8 @@ static const struct debug_named_value debug_options[] = {
 	{ "testvmfaultshader", DBG(TEST_VMFAULT_SHADER), "Invoke a shader VM fault test and exit." },
 	{ "testdmaperf", DBG(TEST_DMA_PERF), "Test DMA performance" },
 	{ "testgds", DBG(TEST_GDS), "Test GDS." },
+	{ "testgdsmm", DBG(TEST_GDS_MM), "Test GDS memory management." },
+	{ "testgdsoamm", DBG(TEST_GDS_OA_MM), "Test GDS OA memory management." },
 
 	DEBUG_NAMED_VALUE_END /* must be last */
 };
@@ -788,6 +790,41 @@ static void si_test_vmfault(struct si_screen *sscreen)
 	exit(0);
 }
 
+static void si_test_gds_memory_management(struct si_context *sctx,
+					  unsigned alloc_size, unsigned alignment,
+					  enum radeon_bo_domain domain)
+{
+	struct radeon_winsys *ws = sctx->ws;
+	struct radeon_cmdbuf *cs[8];
+	struct pb_buffer *gds_bo[ARRAY_SIZE(cs)];
+
+	for (unsigned i = 0; i < ARRAY_SIZE(cs); i++) {
+		cs[i] = ws->cs_create(sctx->ctx, RING_COMPUTE,
+				      NULL, NULL, false);
+		gds_bo[i] = ws->buffer_create(ws, alloc_size, alignment, domain, 0);
+		assert(gds_bo[i]);
+	}
+
+	for (unsigned iterations = 0; iterations < 20000; iterations++) {
+		for (unsigned i = 0; i < ARRAY_SIZE(cs); i++) {
+			/* This clears GDS with CP DMA.
+			 *
+			 * We don't care if GDS is present. Just add some packet
+			 * to make the GPU busy for a moment.
+			 */
+			si_cp_dma_clear_buffer(sctx, cs[i], NULL, 0, alloc_size, 0,
+					       SI_CPDMA_SKIP_BO_LIST_UPDATE |
+					       SI_CPDMA_SKIP_CHECK_CS_SPACE |
+					       SI_CPDMA_SKIP_GFX_SYNC, 0, 0);
+
+			ws->cs_add_buffer(cs[i], gds_bo[i], domain,
+					  RADEON_USAGE_READWRITE, 0);
+			ws->cs_flush(cs[i], PIPE_FLUSH_ASYNC, NULL);
+		}
+	}
+	exit(0);
+}
+
 static void si_disk_cache_create(struct si_screen *sscreen)
 {
 	/* Don't use the cache if shader dumping is enabled. */
@@ -1142,5 +1179,14 @@ struct pipe_screen *radeonsi_screen_create(struct radeon_winsys *ws,
 	if (sscreen->debug_flags & DBG(TEST_GDS))
 		si_test_gds((struct si_context*)sscreen->aux_context);
 
+	if (sscreen->debug_flags & DBG(TEST_GDS_MM)) {
+		si_test_gds_memory_management((struct si_context*)sscreen->aux_context,
+					      32 * 1024, 4, RADEON_DOMAIN_GDS);
+	}
+	if (sscreen->debug_flags & DBG(TEST_GDS_OA_MM)) {
+		si_test_gds_memory_management((struct si_context*)sscreen->aux_context,
+					      4, 1, RADEON_DOMAIN_OA);
+	}
+
 	return &sscreen->b;
 }
diff --git a/src/gallium/drivers/radeonsi/si_pipe.h b/src/gallium/drivers/radeonsi/si_pipe.h
index 3ec645f9c7..1d677d29e8 100644
--- a/src/gallium/drivers/radeonsi/si_pipe.h
+++ b/src/gallium/drivers/radeonsi/si_pipe.h
@@ -174,6 +174,8 @@ enum {
 	DBG_TEST_VMFAULT_SHADER,
 	DBG_TEST_DMA_PERF,
 	DBG_TEST_GDS,
+	DBG_TEST_GDS_MM,
+	DBG_TEST_GDS_OA_MM,
 };
 
 #define DBG_ALL_SHADERS		(((1 << (DBG_CS + 1)) - 1))