Created attachment 135840 [details] test output The following test case is failing on CNL with latest configuration. Test Case: igt@gem_mmap_gtt@coherency Assertion: (gem_mmap_gtt:1557) CRITICAL: Failed assertion: cpu[x] == i (gem_mmap_gtt:1557) CRITICAL: error: 0 != 4608 Subtest coherency failed.
Platform configuration ====================================== Software ====================================== kernel version : 4.15.0-rc1-drm-intel-qa-ww48-commit-6d6c48b+ hostname : CNL-1 architecture : x86_64 os version : Ubuntu 16.10 os codename : yakkety kernel driver : i915 bios revision : 108.1 bios release date : 10/12/2017 ksc : 1.32 hardware acceleration : disabled swap partition : enabled on (/dev/nvme0n1p3) ====================================== Graphic drivers ====================================== grep: /opt/X11R7/var/log/Xorg.0.log: No such file or directory libdrm : 2.4.88 cairo : 1.15.9 intel-gpu-tools (tag) : intel-gpu-tools-1.20-169-gac6739b intel-gpu-tools (commit) : ac6739b ====================================== Hardware ====================================== motherboard model : CannonLakeClientPlatform motherboard id : CannonLakeYLPDDR4RVP form factor : Laptop manufacturer : IntelCorporation cpu family : Other cpu family id : 6 cpu information : Genuine Intel(R) CPU 0000 @ 1.00GHz gpu card : Intel Corporation Device 5a49 (rev 03) (prog-if 00 [VGA controller]) memory ram : 7.61 GB max memory ram : 8 GB cpu thread : 4 cpu core : 2 cpu model : 102 cpu stepping : 2 socket : Other current cd clock frequency : 168000 kHz maximum cd clock frequency : 528000 kHz displays connected : eDP-1 ====================================== Firmware ====================================== dmc fw loaded : yes dmc version : 1.6 guc fw loaded : fetch NONE, load NONE guc version wanted : wanted 0.0, found 0.0 guc version found : wanted 0.0, found 0.0 ====================================== kernel parameters ====================================== quiet drm.debug=0x1e pci=pcie_bus_safe intel_iommu=igfx_off auto panic=1 nmi_watchdog=panic i915.alpha_support=1 resume=/dev/nvme0n1p3 fastboot
Created attachment 135841 [details] dmesg log
Created attachment 135842 [details] kernel log
Has it always failed? Is it 100% reliable? Has CNL changed the GTT implementation compared to the other Big Core? That is the ultimate question, whether we need to apply the w/a to CNL as well.
Hello Chris, Yes, it is failing 100% of the times, We don't have any record that this test was success before. Regards.
The following test case is failing on BXT igt@gem_mmap_gtt@coherency IGT-Version: 1.20-g39ac6b8 (x86_64) (Linux: 4.15.0-rc2-drm-intel-qa-ww49-commit-bdf9b36+ x86_64) (gem_mmap_gtt:4141) CRITICAL: Failed assertion: cpu[x] == i
*** This bug has been marked as a duplicate of bug 100587 ***
Now treating CNL as equally incoherent as Atom.
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