[Intel-gfx] [PATCH i-g-t 3/9] tests/i915/drm_fdinfo: Add some memory info tests

[Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>]

From: Tvrtko Ursulin <tvrtko.ursulin@intel.com>

A few basic smoke tests to check per client memory info looks legit.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
---
 tests/intel/drm_fdinfo.c | 217 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 217 insertions(+)

diff --git a/tests/intel/drm_fdinfo.c b/tests/intel/drm_fdinfo.c
index c4218b0d16e6..3ced658f2faa 100644
--- a/tests/intel/drm_fdinfo.c
+++ b/tests/intel/drm_fdinfo.c
@@ -23,6 +23,7 @@
  */
 
 #include <fcntl.h>
+#include <sys/ioctl.h>
 
 #include "igt.h"
 #include "igt_core.h"
@@ -76,6 +77,16 @@
  *
  * SUBTEST: virtual-idle
  *
+ * SUBTEST: memory-info-idle
+ *
+ * SUBTEST: memory-info-active
+ *
+ * SUBTEST: memory-info-resident
+ *
+ * SUBTEST: memory-info-purgeable
+ *
+ * SUBTEST: memory-info-shared
+ *
  * SUBTEST: context-close-stress
  */
 
@@ -143,6 +154,11 @@ static unsigned int measured_usleep(unsigned int usec)
 #define FLAG_HANG (8)
 #define TEST_ISOLATION (16)
 
+#define TEST_ACTIVE TEST_BUSY
+#define TEST_RESIDENT (32)
+#define TEST_PURGEABLE (64)
+#define TEST_SHARED (128)
+
 static void end_spin(int fd, igt_spin_t *spin, unsigned int flags)
 {
 	if (!spin)
@@ -772,6 +788,172 @@ static void stress_context_close(int i915)
 	igt_stop_helper(&reader);
 }
 
+static size_t read_fdinfo(char *buf, const size_t sz, int at, const char *name)
+{
+	size_t count;
+	int fd;
+
+	fd = openat(at, name, O_RDONLY);
+	if (fd < 0)
+		return 0;
+
+	count = read(fd, buf, sz - 1);
+	if (count > 0)
+		buf[count - 1] = 0;
+	close(fd);
+
+	return count > 0 ? count : 0;
+}
+
+/*
+ * At least this much, but maybe less if we started with a driver internal
+ * baseline which can go away behind our back.
+ */
+#define fdinfo_assert_gte(cur, prev, sz, base) \
+({ \
+	int64_t __sz = (sz) - (base); \
+	int64_t __d = (cur) - (prev); \
+	igt_assert_f(__d >= __sz, \
+		     "prev=%"PRIu64" cur=%"PRIu64" delta=%"PRId64" sz=%"PRIu64" baseline=%"PRIu64"\n%s\n", \
+		     (prev), (cur), __d, (sz), (base), fdinfo_buf); \
+})
+
+#define fdinfo_assert_eq(cur, prev, sz, base) \
+({ \
+	int64_t __d = (cur) - (prev); \
+	igt_assert_f(__d == 0, \
+		     "prev=%"PRIu64" cur=%"PRIu64" delta=%"PRId64" sz=%"PRIu64" baseline=%"PRIu64"\n%s\n", \
+		     (prev), (cur), __d, (sz), (base), fdinfo_buf); \
+})
+
+static void
+test_memory(int i915, struct gem_memory_region *mr, unsigned int flags)
+{
+	const unsigned int r = mr->ci.memory_class == I915_MEMORY_CLASS_SYSTEM ? 0 : 1; /* See region map */
+	const uint64_t max_mem = 512ull * 1024 * 1024;
+	const uint64_t max_bo = 16ull * 1024 * 1024;
+	struct drm_client_fdinfo base_info, prev_info = { };
+	struct drm_client_fdinfo info = { };
+	char buf[64], fdinfo_buf[4096];
+	igt_spin_t *spin = NULL;
+	uint64_t total = 0, sz;
+	uint64_t ahnd;
+	int ret, dir;
+
+	i915 = drm_reopen_driver(i915);
+
+	ahnd = get_reloc_ahnd(i915, 0);
+
+	ret = snprintf(buf, sizeof(buf), "%u", i915);
+	igt_assert(ret > 0 && ret < sizeof(buf));
+
+	dir = open("/proc/self/fdinfo", O_DIRECTORY | O_RDONLY);
+	igt_assert_fd(dir);
+
+	gem_quiescent_gpu(i915);
+	ret =  __igt_parse_drm_fdinfo(dir, buf, &info, NULL, 0, NULL, 0);
+	igt_assert(ret > 0);
+	igt_require(info.num_regions);
+	memcpy(&prev_info, &info, sizeof(info));
+	memcpy(&base_info, &info, sizeof(info));
+
+	while (total < max_mem) {
+		static const char *region_map[] = {
+			"system0",
+			"local0",
+		};
+		uint32_t bo;
+
+		sz = random() % max_bo;
+		ret = __gem_create_in_memory_region_list(i915, &bo, &sz, 0,
+							 &mr->ci, 1);
+		igt_assert_eq(ret, 0);
+		total += sz;
+
+		if (flags & (TEST_RESIDENT | TEST_PURGEABLE | TEST_ACTIVE))
+			spin = igt_spin_new(i915,
+					    .dependency = bo,
+					    .ahnd = ahnd);
+		else
+			spin = NULL;
+
+		if (flags & TEST_PURGEABLE) {
+			gem_madvise(i915, bo, I915_MADV_DONTNEED);
+			igt_spin_free(i915, spin);
+			gem_quiescent_gpu(i915);
+			spin = NULL;
+		}
+
+		if (flags & TEST_SHARED) {
+			struct drm_gem_open open_struct;
+			struct drm_gem_flink flink;
+
+			flink.handle = bo;
+			ret = ioctl(i915, DRM_IOCTL_GEM_FLINK, &flink);
+			igt_assert_eq(ret, 0);
+
+			open_struct.name = flink.name;
+			ret = ioctl(i915, DRM_IOCTL_GEM_OPEN, &open_struct);
+			igt_assert_eq(ret, 0);
+			igt_assert(open_struct.handle != 0);
+		}
+
+		memset(&info, 0, sizeof(info));
+		ret =  __igt_parse_drm_fdinfo(dir, buf, &info,
+					      NULL, 0,
+					      region_map, ARRAY_SIZE(region_map));
+		igt_assert(ret > 0);
+		igt_assert(info.num_regions);
+
+		read_fdinfo(fdinfo_buf, sizeof(fdinfo_buf), dir, buf);
+
+		/* >= to account for objects out of our control */
+		fdinfo_assert_gte(info.region_mem[r].total,
+				  prev_info.region_mem[r].total,
+				  sz,
+				  base_info.region_mem[r].total);
+
+		if (flags & TEST_SHARED)
+			fdinfo_assert_gte(info.region_mem[r].shared,
+					  prev_info.region_mem[r].shared,
+					  sz,
+					  base_info.region_mem[r].shared);
+		else
+			fdinfo_assert_eq(info.region_mem[r].shared,
+					 prev_info.region_mem[r].shared,
+					 sz,
+					 base_info.region_mem[r].shared);
+
+		if (flags & (TEST_RESIDENT | TEST_PURGEABLE | TEST_ACTIVE))
+			fdinfo_assert_gte(info.region_mem[r].resident,
+					  (uint64_t)0, /* We can only be sure the current buffer is resident. */
+					  sz,
+					  (uint64_t)0);
+
+		if (flags & TEST_PURGEABLE)
+			fdinfo_assert_gte(info.region_mem[r].purgeable,
+					  (uint64_t)0, /* We can only be sure the current buffer is purgeable (subset of resident). */
+					  sz,
+					  (uint64_t)0);
+
+		if (flags & TEST_ACTIVE)
+			fdinfo_assert_gte(info.region_mem[r].active,
+					  (uint64_t)0, /* We can only be sure the current buffer is active. */
+					  sz,
+					  (uint64_t)0);
+
+		memcpy(&prev_info, &info, sizeof(info));
+
+		if (spin) {
+			igt_spin_free(i915, spin);
+			gem_quiescent_gpu(i915);
+		}
+	}
+
+	put_ahnd(ahnd);
+	close(i915);
+}
+
 #define test_each_engine(T, i915, ctx, e) \
 	igt_subtest_with_dynamic(T) for_each_ctx_engine(i915, ctx, e) \
 		igt_dynamic_f("%s", e->name)
@@ -903,6 +1085,41 @@ igt_main
 	test_each_engine("isolation", i915, ctx, e)
 		single(i915, ctx, e, TEST_BUSY | TEST_ISOLATION);
 
+	igt_subtest_with_dynamic("memory-info-idle") {
+		for_each_memory_region(r, i915) {
+			igt_dynamic_f("%s", r->name)
+				test_memory(i915, r, 0);
+		}
+	}
+
+	igt_subtest_with_dynamic("memory-info-resident") {
+		for_each_memory_region(r, i915) {
+			igt_dynamic_f("%s", r->name)
+				test_memory(i915, r, TEST_RESIDENT);
+		}
+	}
+
+	igt_subtest_with_dynamic("memory-info-purgeable") {
+		for_each_memory_region(r, i915) {
+			igt_dynamic_f("%s", r->name)
+				test_memory(i915, r, TEST_PURGEABLE);
+		}
+	}
+
+	igt_subtest_with_dynamic("memory-info-active") {
+		for_each_memory_region(r, i915) {
+			igt_dynamic_f("%s", r->name)
+				test_memory(i915, r, TEST_ACTIVE);
+		}
+	}
+
+	igt_subtest_with_dynamic("memory-info-shared") {
+		for_each_memory_region(r, i915) {
+			igt_dynamic_f("%s", r->name)
+				test_memory(i915, r, TEST_SHARED);
+		}
+	}
+
 	igt_subtest_group {
 		int newfd;
 
-- 
2.39.2