[igt-dev] [PATCH i-g-t 3/3] i915/sysfs_preempt_timeout: Update test to work with GuC submission

[Tvrtko Ursulin]

On 16/09/2021 21:49, John Harrison wrote:
> On 9/16/2021 11:03, Matthew Brost wrote:
>> Increase reset timeout as resets can take a bit longer with GuC
>> submission because an error capture is done and with a large GuC log (16
>> MB) these take a while.
>>
>> Don't run 'off' section as with GuC submission we don't handle
>> dynamically changing the preemption timeout from 'off' to 'on' on a
>> currently running context. This is not bug in GuC submission rather an
>> architectural decision to not implement this as there is no user aside
>> from IGTs. We don't run this section on any gen12+ platforms as we
>> assume GuC submission on these platforms.

Tigerlake as well or not care about removing the coverage from it?

Regards,

Tvrtko

>>
>> Signed-off-by: Matthew Brost <matthew.brost at intel.com>
> Reviewed-by: John Harrison <John.C.Harrison at Intel.com>
> 
>> ---
>>   tests/i915/sysfs_preempt_timeout.c | 6 +++++-
>>   1 file changed, 5 insertions(+), 1 deletion(-)
>>
>> diff --git a/tests/i915/sysfs_preempt_timeout.c 
>> b/tests/i915/sysfs_preempt_timeout.c
>> index d176ae72e..fe6b30236 100644
>> --- a/tests/i915/sysfs_preempt_timeout.c
>> +++ b/tests/i915/sysfs_preempt_timeout.c
>> @@ -29,6 +29,7 @@
>>   #include <sys/types.h>
>>   #include <unistd.h>
>> +#include "igt.h"
>>   #include "igt_params.h"
>>   #include "drmtest.h"
>>   #include "i915/gem.h"
>> @@ -41,7 +42,7 @@
>>   #include "sw_sync.h"
>>   #define ATTR "preempt_timeout_ms"
>> -#define RESET_TIMEOUT 50 /* milliseconds, at least one jiffie for 
>> kworker */
>> +#define RESET_TIMEOUT 1000 /* milliseconds, at long enough for an 
>> error capture */
>>   static bool __enable_hangcheck(int dir, bool state)
>>   {
>> @@ -254,6 +255,9 @@ static void test_off(int i915, int engine)
>>       gem_quiescent_gpu(i915);
>>       igt_require(enable_hangcheck(i915, false));
>> +    /* Not a supported behavior for GuC enabled platforms */
>> +    igt_require(intel_gen(intel_get_drm_devid(i915)) < 12);
>> +
>>       igt_assert(igt_sysfs_scanf(engine, "class", "%u", &class) == 1);
>>       igt_assert(igt_sysfs_scanf(engine, "instance", "%u", &inst) == 1);
>