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| author | Mika Kuoppala <mika.kuoppala@linux.intel.com> | 2015-12-16 09:26:48 +0200 |
|---|---|---|
| committer | Mika Kuoppala <mika.kuoppala@intel.com> | 2016-01-08 13:13:50 +0200 |
| commit | 7571494004d88249bcee2a20fa74cb50753676fe (patch) | |
| tree | 1f1e51b4ad0482bad782071eebdc64b9aa2b1bcd /tools/perf/scripts/python/netdev-times.py | |
| parent | 55ec45c2ced1a4b1e7cd2e7e306101f328958760 (diff) | |
| download | cachepc-linux-7571494004d88249bcee2a20fa74cb50753676fe.tar.gz cachepc-linux-7571494004d88249bcee2a20fa74cb50753676fe.zip | |
drm/i915: Do one shot unclaimed mmio detection less frequently
We have done unclaimed register access check in normal
(mmio_debug=0) mode once per write. This adds probability
of finding the exact sequence where we did the bad access, but
also adds burden to each write.
As we have mmio_debug available for more fine grained analysis,
give up accuracy of detecting correct spot at the first occurrence
by doing the one shot detection and arming of mmio_debug in hangcheck
and in modeset. This removes the write path performance burden.
v2: Remove gratuitous DRM_DEBUG and return value, comments (Chris)
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Paulo Zanoni <przanoni@gmail.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1450250808-14864-1-git-send-email-mika.kuoppala@intel.com
Diffstat (limited to 'tools/perf/scripts/python/netdev-times.py')
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