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igt/gem_mmap: Add one more extra large bo

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Daniel complained that all the tests in gem_mmap.c were too quick. This
one aims to rectify that by double checking that if we mmap a buffer
larger enough to force swapping, everything still works.

Also fix the test to exercise the different object sizes!

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2015-08-14 13:40:01 +01:00
parent 8af62be2ad
commit d568f69d5d
1 changed files with 41 additions and 19 deletions
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60
tests/gem_mmap.c
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@ -44,13 +44,14 @@
int fd;
static void
test_huge_bo(int huge, int tiling)
test_huge_bo(int huge)
{
uint64_t huge_object_size, last_offset;
uint64_t huge_object_size, last_offset, i;
unsigned check = CHECK_RAM;
char *ptr_cpu;
char *cpu_pattern;
uint32_t bo;
int i;
int loop;
switch (huge) {
case -1:
@ -59,11 +60,17 @@ test_huge_bo(int huge, int tiling)
case 0:
huge_object_size = gem_mappable_aperture_size() + PAGE_SIZE;
break;
default:
case 1:
huge_object_size = gem_aperture_size(fd) + PAGE_SIZE;
break;
case 2:
huge_object_size = (intel_get_total_ram_mb() + 1) << 20;
check |= CHECK_SWAP;
break;
default:
return;
}
intel_require_memory(1, huge_object_size, CHECK_RAM);
intel_require_memory(1, huge_object_size, check);
last_offset = huge_object_size - PAGE_SIZE;
@ -77,22 +84,35 @@ test_huge_bo(int huge, int tiling)
/* Obtain CPU mapping for the object. */
ptr_cpu = gem_mmap__cpu(fd, bo, 0, huge_object_size,
PROT_READ | PROT_WRITE);
igt_assert(ptr_cpu);
igt_require(ptr_cpu);
gem_set_domain(fd, bo, I915_GEM_DOMAIN_CPU, I915_GEM_DOMAIN_CPU);
gem_close(fd, bo);
/* Write first page through the mapping and assert reading it back
* works. */
memcpy(ptr_cpu, cpu_pattern, PAGE_SIZE);
igt_assert(memcmp(ptr_cpu, cpu_pattern, PAGE_SIZE) == 0);
igt_debug("Exercising %'llu bytes\n", (long long)huge_object_size);
/* Write last page through the mapping and assert reading it back
* works. */
memcpy(ptr_cpu + last_offset, cpu_pattern, PAGE_SIZE);
igt_assert(memcmp(ptr_cpu + last_offset, cpu_pattern, PAGE_SIZE) == 0);
loop = 0;
do {
/* Write first page through the mapping and
* assert reading it back works.
*/
memcpy(ptr_cpu, cpu_pattern, PAGE_SIZE);
igt_assert(memcmp(ptr_cpu, cpu_pattern, PAGE_SIZE) == 0);
memset(ptr_cpu, 0xcc, PAGE_SIZE);
/* Cross check that accessing two simultaneous pages works. */
igt_assert(memcmp(ptr_cpu, ptr_cpu + last_offset, PAGE_SIZE) == 0);
/* Write last page through the mapping and
* assert reading it back works.
*/
memcpy(ptr_cpu + last_offset, cpu_pattern, PAGE_SIZE);
igt_assert(memcmp(ptr_cpu + last_offset, cpu_pattern, PAGE_SIZE) == 0);
memset(ptr_cpu + last_offset, 0xcc, PAGE_SIZE);
/* Cross check that accessing two simultaneous pages works. */
igt_assert(memcmp(ptr_cpu, ptr_cpu + last_offset, PAGE_SIZE) == 0);
/* Force every page to be faulted and retest */
for (i = 0; i < huge_object_size; i += 4096)
ptr_cpu[i] = i >> 12;
} while (loop++ == 0);
munmap(ptr_cpu, huge_object_size);
free(cpu_pattern);
@ -155,11 +175,13 @@ igt_main
}
igt_subtest("small-bo")
test_huge_bo(fd, -1);
test_huge_bo(-1);
igt_subtest("big-bo")
test_huge_bo(fd, 0);
test_huge_bo(0);
igt_subtest("huge-bo")
test_huge_bo(fd, 1);
test_huge_bo(1);
igt_subtest("swap-bo")
test_huge_bo(2);
igt_fixture
close(fd);