[igt-dev] [PATCH i-g-t] tests/gem_lmem_swapping: add some coverage for big objects

[Matthew Auld]

Everything we are testing here unfortunately fits within one packet (8M)
which means we have zero coverage when we need to split the copy over
multiple packets (including the aux CCS state).

Signed-off-by: Matthew Auld <matthew.auld at intel.com>
Cc: Thomas Hellström <thomas.hellstrom at linux.intel.com>
Cc: Ramalingam C <ramalingam.c at intel.com>
---
 tests/i915/gem_lmem_swapping.c | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/tests/i915/gem_lmem_swapping.c b/tests/i915/gem_lmem_swapping.c
index 1a4f4ca5..67e95cea 100644
--- a/tests/i915/gem_lmem_swapping.c
+++ b/tests/i915/gem_lmem_swapping.c
@@ -63,6 +63,7 @@ struct params {
 #define TEST_ENGINES	(1 << 4)
 #define TEST_MULTI	(1 << 5)
 #define TEST_CCS	(1 << 6)
+#define TEST_BIG	(1 << 7)
 	unsigned int flags;
 	unsigned int seed;
 	bool oom_test;
@@ -477,8 +478,8 @@ static void fill_params(int i915, struct params *params,
 {
 	const int swap_mb = /* For lmem, swap is total of smem + swap. */
 		igt_get_total_ram_mb() + igt_get_total_swap_mb();
-	const unsigned int size = 1 << 20;
 	const int max_swap_pct = 75;
+	unsigned int size;
 	/*
 	 * In random mode, add 85% hard limit to use system memory.
 	 * noticed that 88.8% can trigger OOM on some system.
@@ -487,6 +488,17 @@ static void fill_params(int i915, struct params *params,
 	int spill_mb;
 	uint32_t handle;
 
+	size = 1 << 20;
+	if (flags & TEST_BIG) {
+		/*
+		 * The kernel only copies in small chunks, so make sure we
+		 * have some coverage where multiple packets are needed to copy
+		 * the entire object.
+		 */
+		size = 1u << 26; /* 64M */
+		size += 1u << 16; /* So we also exceed NUM_CCS_BLKS_PER_XFER */
+	}
+
 	if (flags & TEST_RANDOM) {
 		params->size.min = 4096;
 		handle = create_bo(i915, &params->size.min, &region->region,
@@ -733,6 +745,7 @@ igt_main_args("", long_options, help_str, opt_handler, NULL)
 		unsigned int flags;
 	} *test, tests[] = {
 		{ "basic", 0 },
+		{ "basic-big", TEST_BIG },
 		{ "random", TEST_RANDOM },
 		{ "random-engines", TEST_RANDOM | TEST_ENGINES },
 		{ "heavy-random", TEST_RANDOM | TEST_HEAVY },
@@ -746,6 +759,7 @@ igt_main_args("", long_options, help_str, opt_handler, NULL)
 		{ "parallel-random-verify", TEST_PARALLEL | TEST_RANDOM | TEST_VERIFY },
 		{ "parallel-multi", TEST_PARALLEL | TEST_RANDOM | TEST_VERIFY | TEST_ENGINES | TEST_MULTI },
 		{ "verify-ccs", TEST_CCS },
+		{ "verify-ccs-big", TEST_CCS | TEST_BIG },
 		{ "verify-random-ccs", TEST_CCS | TEST_RANDOM },
 		{ "heavy-verify-random-ccs", TEST_CCS | TEST_RANDOM | TEST_HEAVY },
 		{ "heavy-verify-multi-ccs", TEST_CCS | TEST_RANDOM | TEST_HEAVY | TEST_ENGINES | TEST_MULTI },
-- 
2.37.1