[igt-dev] [PATCH i-g-t] i915/gem_mmap_offset: Exercise many, many mmap_offset

Chris Wilson
2020-01-17T21:11:29Z

Just keep on generating a new mmap_offset for the same old buffer, but
for different handles and so exercise the scaling of the obj->mmo lists.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Abdiel Janulgue <abdiel.janulgue@linux.intel.com>
---
tests/i915/gem_mmap_offset.c | 66 ++++++++++++++++++++++++++++++++++++
1 file changed, 66 insertions(+)

diff --git a/tests/i915/gem_mmap_offset.c b/tests/i915/gem_mmap_offset.c
index 95e1e3e6c..005839c38 100644
--- a/tests/i915/gem_mmap_offset.c
+++ b/tests/i915/gem_mmap_offset.c
@@ -326,6 +326,69 @@ static void close_race(int i915, int timeout)
munmap(handles, len);
}

+static void open_flood(int i915, int timeout)
+{
+ unsigned long count;
+ uint32_t handle;
+ int dmabuf;
+ int *ctl;
+
+ ctl = mmap(0, 4096, PROT_WRITE, MAP_SHARED | MAP_ANON, -1, 0);
+ igt_assert(ctl != MAP_FAILED);
+
+ handle = gem_create(i915, 4096);
+ dmabuf = prime_handle_to_fd(i915, handle);
+
+ for_each_mmap_offset_type(t) {
+ struct drm_i915_gem_mmap_offset arg = {
+ .handle = handle,
+ .flags = t->type,
+ };
+
+ if (mmap_offset_ioctl(i915, &arg))
+ continue;
+
+ igt_fork(child, 1) {
+ i915 = gem_reopen_driver(i915);
+ arg.handle = prime_fd_to_handle(i915, dmabuf);
+
+ do {
+ igt_assert_eq(mmap_offset_ioctl(i915, &arg), 0);
+ } while (!READ_ONCE(*ctl));
+ }
+ }
+ gem_close(i915, handle);
+
+ count = 0;
+ igt_until_timeout(timeout) {
+ int tmp;
+
+ tmp = gem_reopen_driver(i915);
+ handle = prime_fd_to_handle(i915, dmabuf);
+
+ for_each_mmap_offset_type(t) {
+ struct drm_i915_gem_mmap_offset arg = {
+ .handle = handle,
+ .flags = t->type,
+ };
+
+ mmap_offset_ioctl(i915, &arg);
+ }
+
+ close(tmp);
+ count++;
+ }
+
+ igt_info("Completed %lu cycles\n", count);
+
+ close(dmabuf);
+ close(i915);
+
+ *ctl = 1;
+ igt_waitchildren();
+ munmap(ctl, 4096);
+}
+
static uint64_t atomic_compare_swap_u64(_Atomic(uint64_t) *ptr,
uint64_t oldval, uint64_t newval)
{
@@ -488,6 +551,9 @@ igt_main
igt_subtest_f("close-race")
close_race(i915, 20);

+ igt_subtest_f("open-flood")
+ open_flood(i915, 20);
+
igt_subtest_f("clear")
always_clear(i915, 20);

--
2.25.0