https://bugs.freedesktop.org/show_bug.cgi?id=63192

Priority: medium Bug ID: 63192 Assignee: dri-devel@lists.freedesktop.org Summary: [nouveau] drmModeSetCursor->nouveau_bo_rd32->ioread32 provides high cpu load when using weston drm-compositor Severity: normal Classification: Unclassified OS: Linux (All) Reporter: vova7890@mail.ru Hardware: x86-64 (AMD64) Status: NEW Version: DRI CVS Component: DRM/other Product: DRI

Weston runned in drm-mode provide very high cpu load on mouse moving. I don`t think that the bug of weston, seems problem in nouveau drm. At launch weston have a log:

... [24465.734894] nouveau W[ PFIFO][0000:02:00.0] INTR 0x00000001: 0x00000004 [24465.748153] nouveau W[ PFIFO][0000:02:00.0] INTR 0x00000001: 0x00000004 [24521.950788] nouveau W[ PFIFO][0000:02:00.0] INTR 0x00000001: 0x00000004 [24521.955032] nouveau W[ PFIFO][0000:02:00.0] INTR 0x00000001: 0x00000004 ...

ioread32_native(ioread32 on litle-endian) using 100% of cpu core. If in weston comment out drmModeSetCursor - cpu load is normal, but no see cursor ofcourse. They copying cursor(64x64) from bo-object. Seems TTM iomem access provide very high cpu load... On radeon it works smoothly and no have very high cpu load.

Kernel 3.9-rc5 (x86_64) Wayland/Weston: git Mesa: git libdrm: git