[PATCH] tests/intel/xe_vm: Update mmap hammer sections to prefetch next page
Randhawa, Jagmeet
jagmeet.randhawa at intel.com
Wed May 1 16:57:45 UTC 2024
On 4/30/2024 3:16 PM, Matthew Brost wrote:
> Adjust mmap hammer sections to prefetch next page by moving BB to within
> PAGE_SIZE /8 of page boundary. This is prefetch next page on all
> platforms, even ones with a smaller prefetch size.
>
> Signed-off-by: Matthew Brost <matthew.brost at intel.com>
> ---
> tests/intel/xe_vm.c | 7 ++++---
> 1 file changed, 4 insertions(+), 3 deletions(-)
>
> diff --git a/tests/intel/xe_vm.c b/tests/intel/xe_vm.c
> index de2b1a8136..77cf1f7e67 100644
> --- a/tests/intel/xe_vm.c
> +++ b/tests/intel/xe_vm.c
> @@ -1623,10 +1623,11 @@ test_mmap_style_bind(int fd, struct drm_xe_engine_class_instance *eci,
> t.fd = fd;
> t.vm = vm;
> #define PAGE_SIZE 4096
> - t.addr = addr + PAGE_SIZE / 2;
> +#define HAMMER_OFFSET (PAGE_SIZE - (PAGE_SIZE / 32))
> + t.addr = addr + HAMMER_OFFSET;
> t.eci = eci;
> t.exit = &exit;
> - t.map = map0 + PAGE_SIZE / 2;
> + t.map = map0 + HAMMER_OFFSET;
> t.barrier = &barrier;
> pthread_barrier_init(&barrier, NULL, 2);
> pthread_create(&t.thread, 0, hammer_thread, &t);
> @@ -1685,7 +1686,7 @@ test_mmap_style_bind(int fd, struct drm_xe_engine_class_instance *eci,
> igt_assert_eq(data->data, 0xc0ffee);
> }
> if (flags & MAP_FLAG_HAMMER_FIRST_PAGE) {
> - memset(map0, 0, PAGE_SIZE / 2);
> + memset(map0, 0, HAMMER_OFFSET);
> memset(map0 + PAGE_SIZE, 0, bo_size - PAGE_SIZE);
> } else {
> memset(map0, 0, bo_size);
Reviewed-by: Jagmeet Randhawa <jagmeet.randhawa at intel.com>
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