diff options
| author | Chris Wilson <chris@chris-wilson.co.uk> | 2020-10-22 15:52:19 +0100 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2020-10-23 11:26:49 +0100 |
| commit | 7dd2fe99bd9dde00456cc5abf7e5ef0c8d7d6118 (patch) | |
| tree | 17bd491d4bde7db4adc2c92cc615dac90d72ef56 /tests/i915/gem_mmap_gtt.c | |
| parent | b4bcf05cb9839037128905deda7146434155cc41 (diff) | |
i915/gem_mmap_gtt: Trim object size for ptracing
For verifying vm_ops.access we only need a page or two to check we both
advance across a page boundary and find the right offset within a page.
16MiB is overkill for the slow uncached reads through the slow ptrace
interface, so reduce the object size by a couple of orders of magnitude.
Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/2425
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Diffstat (limited to 'tests/i915/gem_mmap_gtt.c')
| -rw-r--r-- | tests/i915/gem_mmap_gtt.c | 23 |
1 files changed, 12 insertions, 11 deletions
diff --git a/tests/i915/gem_mmap_gtt.c b/tests/i915/gem_mmap_gtt.c index 6637bba0..3cce19e9 100644 --- a/tests/i915/gem_mmap_gtt.c +++ b/tests/i915/gem_mmap_gtt.c @@ -525,6 +525,7 @@ static void *memchr_inv(const void *s, int c, size_t n) static void test_ptrace(int fd) { + unsigned long sz = 16 * 4096; unsigned long AA, CC; unsigned long *gtt, *cpy; uint32_t bo; @@ -533,16 +534,16 @@ test_ptrace(int fd) memset(&AA, 0xaa, sizeof(AA)); memset(&CC, 0x55, sizeof(CC)); - cpy = malloc(OBJECT_SIZE); - memset(cpy, AA, OBJECT_SIZE); + cpy = malloc(sz); + memset(cpy, AA, sz); - bo = gem_create(fd, OBJECT_SIZE); - gtt = mmap_bo(fd, bo, OBJECT_SIZE); - memset(gtt, CC, OBJECT_SIZE); + bo = gem_create(fd, sz); + gtt = mmap_bo(fd, bo, sz); + memset(gtt, CC, sz); gem_close(fd, bo); - igt_assert(!memchr_inv(gtt, CC, OBJECT_SIZE)); - igt_assert(!memchr_inv(cpy, AA, OBJECT_SIZE)); + igt_assert(!memchr_inv(gtt, CC, sz)); + igt_assert(!memchr_inv(cpy, AA, sz)); igt_fork(child, 1) { ptrace(PTRACE_TRACEME, 0, NULL, NULL); @@ -553,7 +554,7 @@ test_ptrace(int fd) pid = wait(NULL); ptrace(PTRACE_ATTACH, pid, NULL, NULL); - for (int i = 0; i < OBJECT_SIZE / sizeof(long); i++) { + for (int i = 0; i < sz / sizeof(long); i++) { long ret; ret = ptrace(PTRACE_PEEKDATA, pid, gtt + i); @@ -570,10 +571,10 @@ test_ptrace(int fd) igt_waitchildren(); /* The contents of the two buffers should now be swapped */ - igt_assert(!memchr_inv(gtt, AA, OBJECT_SIZE)); - igt_assert(!memchr_inv(cpy, CC, OBJECT_SIZE)); + igt_assert(!memchr_inv(gtt, AA, sz)); + igt_assert(!memchr_inv(cpy, CC, sz)); - munmap(gtt, OBJECT_SIZE); + munmap(gtt, sz); free(cpy); } |