| Summary: | [amdgpu SI] amdgpu on SI devices is much slower then radeon | ||
|---|---|---|---|
| Product: | Mesa | Reporter: | Trevor Davenport <trevor.davenport> |
| Component: | Drivers/Gallium/radeonsi | Assignee: | Default DRI bug account <dri-devel> |
| Status: | RESOLVED FIXED | QA Contact: | Default DRI bug account <dri-devel> |
| Severity: | normal | ||
| Priority: | medium | CC: | mrader3940, vedran |
| Version: | git | ||
| Hardware: | Other | ||
| OS: | All | ||
| Whiteboard: | |||
| i915 platform: | i915 features: | ||
| Attachments: |
dmesg
Xorg.0.log dmesg | egrep 'drm|amdgpu' dmesg | egrep 'drm|radeon' |
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Created attachment 126683 [details]
Xorg.0.log
The above numbers where using the modesetting driver since I was trying to keep as much the same between radeon and amdgpu. I get similar behavior from amdgpu though. Both radeon and amdgpu built from commit: https://cgit.freedesktop.org/~agd5f/linux/ drm-next-4.9-wip commit 25114c509cc39b387aa358a86fa48c855266a6fe Author: Alex Deucher <alexander.deucher@amd.com> Date: Wed Sep 14 14:15:34 2016 -0400 drm/radeon/atif: Send a hotplug event when we get dgpu display request Mesa: commit 6b0ba02cae1526d6e6671a9ff620fd3bd7d4d032 llvm: commit 338f974b6e4f5d5d004d36d0d446289280d0c372 drm: commit 2d00869599a1c853238401a38a334c3bc8673343 Same here. Using Arch x86_64 with linux-ck 4.11.2 and mesa 17.1.0. AMDGPU's performance is about 60~70% of radeon's on MSI R7 370 Armor 2X. Created attachment 131435 [details]
dmesg | egrep 'drm|amdgpu'
Created attachment 131436 [details]
dmesg | egrep 'drm|radeon'
From phoronix's data this appears to not happen on Tahiti chips. The 270x and 370 are always slower on amdgpu compared to radeon. See http://www.phoronix.com/scan.php?page=article&item=linux-411-gcn10&num=2 This is fixed by the following commit: author Jean Delvare <jdelvare@suse.de> 2017-07-30 08:18:25 (GMT) committer Alex Deucher <alexander.deucher@amd.com> 2017-07-31 20:30:42 (GMT) commit e5c8d400da67abc1c033b9a4af1806926b55e5f6 (patch) tree cf3dac459890ed900416d4087ae0603d4aa42b6f parent 29805b5f60d88c56ae7e91ae231f0ff8bf1983b8 (diff) drm/amdgpu: Fix undue fallthroughs in golden registers initialization As I was staring at the si_init_golden_registers code, I noticed that the Pitcairn initialization silently falls through the Cape Verde initialization, and the Oland initialization falls through the Hainan initialization. However there is no comment stating that this is intentional, and the radeon driver doesn't have any such fallthrough, so I suspect this is not supposed to happen. Commit can be seen here: https://cgit.freedesktop.org/~agd5f/linux/commit/?h=drm-next-4.14-wip&id=e5c8d400da67abc1c033b9a4af1806926b55e5f6 With this fix I now get performance approximately equal to that of radeon. |
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Created attachment 126682 [details] dmesg AMDGPU on SI devices appears to be much slower then radeon currently is. For example, Unigine Heaven 4.0: AMDGPU FPS:18.3 Score:460 Min FPS:9.5 Max FPS:46.1 RADEON FPS:38.4 Score:967 Min FPS:7.5 Max FPS:83.5 Reading /sys/kernel/debug/dri/0/radeon_pm_info both report the same values: uvd vclk: 0 dclk: 0 power level 3 sclk: 105000 mclk: 140000 vddc: 1206 vddci: 1025 pcie gen: 2