Re: [PATCH igt] igt/prime_busy: Declare the hang tests expect to cause GPU hangs

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Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> writes:

> Pull the two subtests together into the same subtest group as the
> fixtures were repeated for both and so we can consolidate down to one.
>
> Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
> Cc: Mika Kuoppala <mika.kuoppala@xxxxxxxxxxxxxxx>

Reviewed-by: Mika Kuoppala <mika.kuoppala@xxxxxxxxx>

> ---
>  tests/prime_busy.c | 81 ++++++++++++++++++++++--------------------------------
>  1 file changed, 33 insertions(+), 48 deletions(-)
>
> diff --git a/tests/prime_busy.c b/tests/prime_busy.c
> index cbc91545..a516ab86 100644
> --- a/tests/prime_busy.c
> +++ b/tests/prime_busy.c
> @@ -52,6 +52,8 @@ static void busy(int fd, unsigned ring, unsigned flags)
>  	uint32_t *batch, *bbe;
>  	int i, count, timeout;
>  
> +	gem_quiescent_gpu(fd);
> +
>  	memset(&execbuf, 0, sizeof(execbuf));
>  	execbuf.buffers_ptr = (uintptr_t)obj;
>  	execbuf.buffer_count = 2;
> @@ -172,53 +174,39 @@ static void busy(int fd, unsigned ring, unsigned flags)
>  	close(pfd[SCRATCH].fd);
>  }
>  
> -static void run_busy(int fd,
> -		     const struct intel_execution_engine *e,
> -		     const char *name, unsigned flags)
> -{
> -	igt_fixture {
> -		gem_require_ring(fd, e->exec_id | e->flags);
> -		igt_require(gem_can_store_dword(fd, e->exec_id | e->flags));
> -		gem_quiescent_gpu(fd);
> -
> -		if ((flags & HANG) == 0)
> -			igt_fork_hang_detector(fd);
> -	}
> -
> -	igt_subtest_f("%s%s-%s",
> -		      !e->exec_id && !(flags & HANG) ? "basic-" : "",
> -		      name, e->name)
> -		busy(fd, e->exec_id | e->flags, flags);
> -
> -	igt_fixture {
> -		if ((flags & HANG) == 0)
> -			igt_stop_hang_detector();
> -		gem_quiescent_gpu(fd);
> -	}
> -}
> -
> -static void run_poll(int fd,
> -		     const struct intel_execution_engine *e,
> -		     const char *name, unsigned flags)
> +static void test_engine_mode(int fd,
> +			     const struct intel_execution_engine *e,
> +			     const char *name, unsigned int flags)
>  {
> -	igt_fixture {
> -		gem_require_ring(fd, e->exec_id | e->flags);
> -		igt_require(gem_can_store_dword(fd, e->exec_id | e->flags));
> -
> -		gem_quiescent_gpu(fd);
> -		if ((flags & HANG) == 0)
> -			igt_fork_hang_detector(fd);
> -	}
> +	igt_hang_t hang = {};
>  
> -	igt_subtest_f("%swait-%s-%s",
> -		      !e->exec_id && !(flags & HANG) ? "basic-" : "",
> -		      name, e->name)
> -		busy(fd, e->exec_id | e->flags, flags | POLL);
> +	igt_subtest_group {
> +		igt_fixture {
> +			gem_require_ring(fd, e->exec_id | e->flags);
> +			igt_require(gem_can_store_dword(fd, e->exec_id | e->flags));
> +
> +			if ((flags & HANG) == 0)
> +				igt_fork_hang_detector(fd);
> +			else
> +				hang = igt_allow_hang(fd, 0, 0);
> +		}
>  
> -	igt_fixture {
> -		if ((flags & HANG) == 0)
> -			igt_stop_hang_detector();
> -		gem_quiescent_gpu(fd);
> +		igt_subtest_f("%s%s-%s",
> +			      !e->exec_id && !(flags & HANG) ? "basic-" : "",
> +			      name, e->name)
> +			busy(fd, e->exec_id | e->flags, flags);
> +
> +		igt_subtest_f("%swait-%s-%s",
> +			      !e->exec_id && !(flags & HANG) ? "basic-" : "",
> +			      name, e->name)
> +			busy(fd, e->exec_id | e->flags, flags | POLL);
> +
> +		igt_fixture {
> +			if ((flags & HANG) == 0)
> +				igt_stop_hang_detector();
> +			else
> +				igt_disallow_hang(fd, hang);
> +		}
>  	}
>  }
>  
> @@ -250,10 +238,7 @@ igt_main
>  
>  		for (e = intel_execution_engines; e->name; e++) {
>  			for (const struct mode *m = modes; m->name; m++)
> -				igt_subtest_group {
> -					run_busy(fd, e, m->name, m->flags);
> -					run_poll(fd, e, m->name, m->flags);
> -				}
> +				test_engine_mode(fd, e, m->name, m->flags);
>  		}
>  	}
>  
> -- 
> 2.14.1
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