From: Ville Syrjälä <[email protected]> msleep() can sleep for way too long, so switch wait_for() to use usleep_range() instead. Following a totally unscientific method I just picked the range as W-2W.
This cuts the i915 init time on my BSW to almost half: - initcall i915_init+0x0/0xa8 [i915] returned 0 after 419977 usecs + initcall i915_init+0x0/0xa8 [i915] returned 0 after 238419 usecs Note that I didn't perform any other benchmarks on this so far. Cc: Jesse Barnes <[email protected]> Signed-off-by: Ville Syrjälä <[email protected]> --- drivers/gpu/drm/i915/intel_drv.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h index 6f20f3a..d2a4de0 100644 --- a/drivers/gpu/drm/i915/intel_drv.h +++ b/drivers/gpu/drm/i915/intel_drv.h @@ -56,8 +56,8 @@ ret__ = -ETIMEDOUT; \ break; \ } \ - if (W && drm_can_sleep()) { \ - msleep(W); \ + if ((W) && drm_can_sleep()) { \ + usleep_range((W)*1000, (W)*2000); \ } else { \ cpu_relax(); \ } \ -- 2.0.5 _______________________________________________ Intel-gfx mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/intel-gfx
