drm/i915/gvt: add a fastpath for cmd parsing on MI_NOOP

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MI_NOOP is a common command appearing in almost all command buffers, put it
into a fastpath can improve perfomance, especially in command buffers
contains lots of MI_NOOPs (0s).

Take glmark2 as an example, 3% performance increase is observed after
introduced this patch. Meanwhile, in case where abundant in MI_NOOPs,
up to 12% performance increase is measured.

v2: use lowercase for index of MI_NOOP in cmd_info (zhenyu wang)

Signed-off-by: Li Weinan <weinan.z.li@intel.com>
Signed-off-by: Zhao Yan <yan.y.zhao@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>

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Zhao Yan 2018-08-01 00:15:09 -04:00 • committed by Zhenyu Wang

parent 279ce5d117

commit db47685da1

1 changed files with 10 additions and 1 deletions

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drivers/gpu/drm/i915/gvt/cmd_parser.c

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