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drm/i915/selftests: try to rein in alloc_smoke

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Depending on RNG we might try to fill an 8G region for every possible
order, using the smallest possible chunk size of 4K, which seems to be
very slow. Try to remedy the situation by adding an overall timeout for
the test, while also selecting each order level in a random fashion.

Closes: https://gitlab.freedesktop.org/drm/intel/issues/1310
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20200305204711.217783-2-matthew.auld@intel.com
This commit is contained in:
Matthew Auld
2020-03-05 20:47:11 +00:00
committed by Chris Wilson
parent f4b1b92f41
commit 1fe3818d17
1 changed files with 20 additions and 5 deletions
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25
drivers/gpu/drm/i915/selftests/i915_buddy.c
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@@ -298,10 +298,12 @@ static void igt_mm_config(u64 *size, u64 *chunk_size)
static int igt_buddy_alloc_smoke(void *arg)
{
struct i915_buddy_mm mm;
int max_order;
IGT_TIMEOUT(end_time);
I915_RND_STATE(prng);
u64 chunk_size;
u64 mm_size;
int err;
int *order;
int err, i;
igt_mm_config(&mm_size, &chunk_size);
@@ -313,10 +315,16 @@ static int igt_buddy_alloc_smoke(void *arg)
return err;
}
for (max_order = mm.max_order; max_order >= 0; max_order--) {
order = i915_random_order(mm.max_order + 1, &prng);
if (!order)
goto out_fini;
for (i = 0; i <= mm.max_order; ++i) {
struct i915_buddy_block *block;
int order;
int max_order = order[i];
bool timeout = false;
LIST_HEAD(blocks);
int order;
u64 total;
err = igt_check_mm(&mm);
@@ -360,6 +368,11 @@ retry:
}
total += i915_buddy_block_size(&mm, block);
if (__igt_timeout(end_time, NULL)) {
timeout = true;
break;
}
} while (total < mm.size);
if (!err)
@@ -373,7 +386,7 @@ retry:
pr_err("post-mm check failed\n");
}
if (err)
if (err || timeout)
break;
cond_resched();
@@ -382,6 +395,8 @@ retry:
if (err == -ENOMEM)
err = 0;
kfree(order);
out_fini:
i915_buddy_fini(&mm);
return err;