kernel/drivers/gpu/drm/vc4/vc4_perfmon.c, branch linux-4.17.yHosts the 0x221E linux distro kernel.https://universe.0xinfinity.dev/distro/kernel/atom?h=linux-4.17.y2018-02-10T22:23:26Zdrm/vc4: Expose performance counters to userspace2018-02-10T22:23:26ZBoris Brezillonboris.brezillon@free-electrons.com2018-01-12T09:09:26Zurn:sha1:65101d8c9108201118efa7e08f4e2c57f438deb9
The V3D engine has various hardware counters which might be interesting
to userspace performance analysis tools.
Expose new ioctls to create/destroy a performance monitor object and
query the counter values of this perfmance monitor.
Note that a perfomance monitor is given an ID that is only valid on the
file descriptor it has been allocated from. A performance monitor can be
attached to a CL submission and the driver will enable HW counters for
this request and update the performance monitor values at the end of the
job.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Eric Anholt <eric@anholt.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20180112090926.12538-1-boris.brezillon@free-electrons.com