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.
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
---
tests/i915/gem_mmap_gtt.c | 23 ++++++++++++-----------
1 file changed, 12 insertions(+), 11 deletions(-)
diff --git a/tests/i915/gem_mmap_gtt.c b/tests/i915/gem_mmap_gtt.c
index 6637bba06..3cce19e9a 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);
}
--
2.28.0
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