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Date:   Mon, 28 Dec 2020 16:36:26 +0800
From:   kernel test robot <>
To:     Chris Wilson <>
Cc:     0day robot <>,
        Mika Kuoppala <>,
        LKML <>,,
Subject: [drm/i915/gt]  eedd8093ed: assertion_failure


FYI, we noticed the following commit (built with gcc-9):

commit: eedd8093ed11ccdf4a4465f1c499c945e093aeaa ("[Intel-gfx] [CI 1/9] drm/i915/gt: Replace direct submit with direct call to tasklet")
base: git:// drm-tip

in testcase: igt
version: igt-x86_64-c88c4cc7-1_20201215
with following parameters:

	group: group-01
	ucode: 0xe2

on test machine: 8 threads Intel(R) Core(TM) i7-6700 CPU @ 3.40GHz with 28G memory

caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):

If you fix the issue, kindly add following tag
Reported-by: kernel test robot <>

[  513.814951] With one display connected: 2.96us
[  513.814952] 
[  513.816036] [IGT] gem_exec_nop: starting dynamic subtest vecs0
[  513.820274] Without a display connected (headless): 3.87us
[  513.826714] 
[  513.835841] (gem_exec_nop:2988) CRITICAL: Test assertion failure function headless, file ../tests/i915/gem_exec_nop.c:431:
[  513.835842] 
[  513.850958] (gem_exec_nop:2988) CRITICAL: Failed assertion: (n_headless) <= (1.0 + 0.1f) * n_display && (n_headless) >= (1.0 - 0.1f) * n_display
[  513.850959] 
[  513.867477] (gem_exec_nop:2988) CRITICAL: 'n_headless' != 'n_display' (0.000004 not within 10.000000% tolerance of 0.000003)
[  513.867478] 

To reproduce:

        git clone
        cd lkp-tests
        bin/lkp install job.yaml  # job file is attached in this email
        bin/lkp run     job.yaml

Oliver Sang

View attachment "config-5.10.0-02916-geedd8093ed11" of type "text/plain" (171088 bytes)

View attachment "job-script" of type "text/plain" (5389 bytes)

Download attachment "dmesg.xz" of type "application/x-xz" (36880 bytes)

View attachment "igt" of type "text/plain" (81370 bytes)

View attachment "job.yaml" of type "text/plain" (4339 bytes)

View attachment "reproduce" of type "text/plain" (7452 bytes)

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