[Bug 99130] [IVB] CONFIG_PROVE_LOCKING=y causes igt/gem_exec/basic-wait-all (and possibly others) to fail

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Wed Dec 21 14:50:00 UTC 2016


--- Comment #11 from Dorota Czaplejewicz <dorota.czaplejewicz at collabora.co.uk> ---
Created attachment 128606
  --> https://bugs.freedesktop.org/attachment.cgi?id=128606&action=edit
ftrace call graph log for i915_gem_wait_ioctl

The call log capturing i915_gem_wait_ioctl invokation and overhead.
The time of ioctl itself (20ns) is dwarfed by a slowdown somewhere in
console_unlock() related to printk() calls (650ns)

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