Messages in this thread | | | Subject | Re: AMD graphics performance regression in 4.15 and later | From | Christian König <> | Date | Wed, 6 Jun 2018 13:33:52 +0200 |
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Am 06.06.2018 um 13:28 schrieb Gabriel C: > 2018-04-11 7:02 GMT+02:00 Gabriel C <nix.or.die@gmail.com>: >>> 2018-04-11 6:00 GMT+02:00 Gabriel C <nix.or.die@gmail.com>: >>> 2018-04-09 11:42 GMT+02:00 Christian König <ckoenig.leichtzumerken@gmail.com>: >>>> Am 07.04.2018 um 00:00 schrieb Jean-Marc Valin: >> ... >>> I can help testing code for 4.17/++ if you wish but that is *different* storry. >>> >> Quick tested an 4.16.0-11490-gb284d4d5a678 , amdgpu and radeon driver >> are broken now in this one. >> >> radeon tells: >> >> ... >> >> [ 6.337838] [drm] PCIE GART of 2048M enabled (table at 0x00000000001D6000). >> [ 6.338210] radeon 0000:21:00.0: (-12) create WB bo failed >> [ 6.338214] radeon 0000:21:00.0: disabling GPU acceleration >> >> ... >> > I have the same Issue now on final 4.17.
Actually Michel came up with a fix for the performance regression which is now backported to older kernels as well.
So the original issue of this mail thread should be fixed by now.
> Also I played with BIOS options also which does not fix anything but > changes the error message. > > IOMMU && SR-IOV disabled the error changes to this : > > [ 7.092044] [drm:r600_ring_test [radeon]] *ERROR* radeon: ring 0 > test failed (scratch(0x850C)=0xCAFEDEAD) > [ 7.092059] radeon 0000:21:00.0: disabling GPU acceleration > > > While I could workaround SWIOTLB bugs in 4.15 and 4.16 , 4.17 seems to > kill the GPU with no way > for me to make it work ( at least I could not find any workaround by now )
That actually sounds like something completely different. Can you provide a full dmesg of radeon and/or amdgpu?
Thanks, Christian.
> > BR
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