Re: [igt-dev] [PATCH i-g-t] tests/perf: Fix B0 counter check in gen12-mi-rpc

[Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com>]

On Tue, Apr 21, 2020 at 11:06:27PM +0300, Lionel Landwerlin wrote:
>On 21/04/2020 21:22, Umesh Nerlige Ramappa wrote:
>>The gen12-mi-rpc test checks for B0 counter to be zero, however,
>>occassionally the counter reads a non-zero value. To ensure the test
>>works as expected, we check B0 with the preset value.
>
>
>What the value being reported?
>
>
>Sounds like we should ask around see if there isn't a deeper problem 
>with the HW configuration.
>

I have seen values 0x121 and 0x1ec. The issue occurs sometimes on 
reboots. Subsequent runs I see that the counter is 0.

Thanks,
Umesh

>
>-Lionel
>
>
>>
>>Signed-off-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com>
>>Fixes: https://gitlab.freedesktop.org/drm/intel/-/issues/1085
>>---
>>  tests/perf.c | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>
>>diff --git a/tests/perf.c b/tests/perf.c
>>index b7d5e50e..9d0ed45c 100644
>>--- a/tests/perf.c
>>+++ b/tests/perf.c
>>@@ -3002,7 +3002,7 @@ gen12_test_mi_rpc(void)
>>  	 */
>>  	igt_assert_eq(report32[0], REPORT_ID);
>>  	igt_assert_neq(report32[1], 0);
>>-	igt_assert_eq(report32[format.b_off >> 2], 0);
>>+	igt_assert_neq(report32[format.b_off >> 2], 0x80808080);
>>  	igt_assert_eq(report32[format_size_32], 0x80808080);
>>  	drm_intel_bo_unmap(bo);
>
>
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