From: Tvrtko Ursulin <[email protected]> Test that VMAs associated with a context are cleaned up when contexts are destroyed.
In practice this emulates the leak seen between fbcon and X server. Every time the X server exits we gain one VMA on the fbcon frame buffer object as externally visible via for example /sys/kernel/debug/dri/0/i915_gem_gtt. Signed-off-by: Tvrtko Ursulin <[email protected]> --- tests/gem_ppgtt.c | 80 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 80 insertions(+) diff --git a/tests/gem_ppgtt.c b/tests/gem_ppgtt.c index 4f6df063214a..363f9d701585 100644 --- a/tests/gem_ppgtt.c +++ b/tests/gem_ppgtt.c @@ -265,6 +265,83 @@ static void flink_and_close(void) close(fd2); } +static int grep_name(char *match, int to_match) +{ + int fdd, ret, matched; + + fdd = open("/sys/kernel/debug/dri/0/i915_gem_gtt", O_RDONLY); + igt_assert(fdd >= 0); + + matched = 0; + do { + char ch; + + ret = read(fdd, &ch, 1); + if (ret == 0) + break; + igt_assert(ret == 1); + + if (ch == match[matched]) + matched++; + else + matched = 0; + } while (matched < to_match); + + close(fdd); + + return matched; +} + +static void flink_and_exit(void) +{ + uint32_t fd, fd2; + uint32_t bo, flinked_bo, name; + char match[100]; + int matched, to_match; + int retry = 0; + const int retries = 50; + + fd = drm_open_any(); + igt_require(uses_full_ppgtt(fd)); + + bo = gem_create(fd, 4096); + name = gem_flink(fd, bo); + + to_match = snprintf(match, sizeof(match), "(name: %u)", name); + igt_assert(to_match < sizeof(match)); + + fd2 = drm_open_any(); + + flinked_bo = gem_open(fd2, name); + exec_and_get_offset(fd2, flinked_bo); + gem_sync(fd2, flinked_bo); + + /* Verify looking for string works OK. */ + matched = grep_name(match, to_match); + igt_assert_eq(matched, to_match); + + gem_close(fd2, flinked_bo); + + /* Close the context. */ + close(fd2); + +retry: + /* Give cleanup some time to run. */ + usleep(100000); + + /* The flinked bo VMA should have been cleared now, so list of VMAs + * in debugfs should not contain the one for the imported object. + */ + matched = grep_name(match, to_match); + if (matched >= to_match && retry++ < retries) + goto retry; + + igt_assert_lt(matched, to_match); + + gem_close(fd, bo); + close(fd); +} + #define N_CHILD 8 int main(int argc, char **argv) { @@ -297,5 +374,8 @@ int main(int argc, char **argv) igt_subtest("flink-and-close-vma-leak") flink_and_close(); + igt_subtest("flink-and-exit-vma-leak") + flink_and_exit(); + igt_exit(); } -- 2.5.1 _______________________________________________ Intel-gfx mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/intel-gfx
