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igt/gem_ctx_exec: Add lrc lite restore subtest

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Exercise lite-restore (re-submit a context that is currently running),
by queueing several small batchbuffers.

This test helps to validate WaIdleLiteRestore.

Signed-off-by: Michel Thierry <michel.thierry@intel.com>
This commit is contained in:
Michel Thierry 2015-04-14 16:42:58 +01:00 committed by Daniel Vetter
parent c4ec47b46d
commit 3be592001b
1 changed files with 29 additions and 1 deletions
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30
tests/gem_ctx_exec.c
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@ -155,7 +155,7 @@ static void big_exec(int fd, uint32_t handle, int ring)
uint32_t handle;
uint32_t batch[2] = {0, MI_BATCH_BUFFER_END};
uint32_t ctx_id;
uint32_t ctx_id, ctx_id2;
int fd;
igt_main
@ -215,4 +215,32 @@ igt_main
gem_context_destroy(fd, ctx_id);
}
igt_subtest("lrc-lite-restore") {
int i, j;
/*
* Need 2 contexts to be able to replicate a lite restore,
* i.e. a running context is resubmitted.
*/
ctx_id = gem_context_create(fd);
ctx_id2 = gem_context_create(fd);
/*
* Queue several small batchbuffers to be sure we'll send execlists
* with 2 valid context, and likely cause a lite restore when ctxB
* is resubmitted at the top of the new execlist.
*/
for (i = 0; i < 20; i++) {
for (j = 0; j < 200; j++) {
igt_assert(exec(fd, handle, I915_EXEC_RENDER, ctx_id) == 0);
igt_assert(exec(fd, handle, I915_EXEC_RENDER, ctx_id2) == 0);
}
gem_sync(fd, handle);
}
gem_context_destroy(fd, ctx_id);
gem_context_destroy(fd, ctx_id2);
}
}