[igt-dev] [PATCH i-g-t v9 27/29] tests/gem_ppgtt: Migrate memory check out of render blits

[Zbigniew Kempczyński]

Running memory cache flush when bcs is doing blits leads to serializing
bcs and rcs part. So we move memory check before blitting giving chance
to parallel the execution.

Signed-off-by: Zbigniew Kempczyński <zbigniew.kempczynski at intel.com>
Cc: Dominik Grzegorzek <dominik.grzegorzek at intel.com>
Cc: Chris Wilson <chris at chris-wilson.co.uk>
---
 tests/i915/gem_ppgtt.c | 46 +++++++++++++++++++++++-------------------
 1 file changed, 25 insertions(+), 21 deletions(-)

diff --git a/tests/i915/gem_ppgtt.c b/tests/i915/gem_ppgtt.c
index b9b3d1fc..5c138abe 100644
--- a/tests/i915/gem_ppgtt.c
+++ b/tests/i915/gem_ppgtt.c
@@ -81,14 +81,8 @@ static void fork_rcs_copy(int timeout, uint32_t final,
 #define CREATE_CONTEXT 0x1
 {
 	igt_render_copyfunc_t render_copy;
-	uint64_t mem_per_child;
 	int devid;
 
-	mem_per_child = SIZE;
-	if (flags & CREATE_CONTEXT)
-		mem_per_child += 2 * 128 * 1024; /* rough context sizes */
-	intel_require_memory(count, mem_per_child, CHECK_RAM);
-
 	for (int child = 0; child < count; child++) {
 		int fd = drm_open_driver(DRIVER_INTEL);
 		struct buf_ops *bops;
@@ -278,7 +272,8 @@ static bool has_contexts(void)
 	return result;
 }
 
-#define N_CHILD 8
+#define BCS_CHILD 1
+#define RCS_CHILD 8
 igt_main
 {
 	igt_fixture {
@@ -289,41 +284,50 @@ igt_main
 	}
 
 	igt_subtest("blt-vs-render-ctx0") {
-		struct intel_buf *bcs[1], *rcs[N_CHILD];
+		struct intel_buf *bcs[BCS_CHILD], *rcs[RCS_CHILD];
+		uint64_t mem_per_test;
 
 		intel_allocator_multiprocess_start();
 
-		fork_bcs_copy(30, 0x4000, bcs, 1);
-		fork_rcs_copy(30, 0x8000 / N_CHILD, rcs, N_CHILD, 0);
+		mem_per_test = SIZE;
+		intel_require_memory(BCS_CHILD + RCS_CHILD,
+				     mem_per_test, CHECK_RAM);
+
+		fork_bcs_copy(30, 0x4000, bcs, BCS_CHILD);
+		fork_rcs_copy(30, 0x8000 / RCS_CHILD, rcs, RCS_CHILD, 0);
 
 		igt_waitchildren();
 
-		surfaces_check(bcs, 1, 0x4000);
-		surfaces_check(rcs, N_CHILD, 0x8000 / N_CHILD);
+		surfaces_check(bcs, BCS_CHILD, 0x4000);
+		surfaces_check(rcs, RCS_CHILD, 0x8000 / RCS_CHILD);
 
-		cleanup_bufs(bcs, 1);
-		cleanup_bufs(rcs, N_CHILD);
+		cleanup_bufs(bcs, BCS_CHILD);
+		cleanup_bufs(rcs, RCS_CHILD);
 
 		intel_allocator_multiprocess_stop();
 	}
 
 	igt_subtest("blt-vs-render-ctxN") {
-		struct intel_buf *bcs[1], *rcs[N_CHILD];
+		struct intel_buf *bcs[BCS_CHILD], *rcs[RCS_CHILD];
+		uint64_t mem_per_test, mem_per_ctx = 2 * 128 * 1024; /* rough context sizes */
 
 		igt_require(has_contexts());
 
 		intel_allocator_multiprocess_start();
 
-		fork_rcs_copy(30, 0x8000 / N_CHILD, rcs, N_CHILD, CREATE_CONTEXT);
-		fork_bcs_copy(30, 0x4000, bcs, 1);
+		mem_per_test = SIZE + mem_per_ctx;
+		intel_require_memory(BCS_CHILD + RCS_CHILD, mem_per_test, CHECK_RAM);
+
+		fork_rcs_copy(30, 0x8000 / RCS_CHILD, rcs, RCS_CHILD, CREATE_CONTEXT);
+		fork_bcs_copy(30, 0x4000, bcs, BCS_CHILD);
 
 		igt_waitchildren();
 
-		surfaces_check(bcs, 1, 0x4000);
-		surfaces_check(rcs, N_CHILD, 0x8000 / N_CHILD);
+		surfaces_check(bcs, BCS_CHILD, 0x4000);
+		surfaces_check(rcs, RCS_CHILD, 0x8000 / RCS_CHILD);
 
-		cleanup_bufs(bcs, 1);
-		cleanup_bufs(rcs, N_CHILD);
+		cleanup_bufs(bcs, BCS_CHILD);
+		cleanup_bufs(rcs, RCS_CHILD);
 
 		intel_allocator_multiprocess_stop();
 	}
-- 
2.26.0