drm/amdkfd: KFD interrupt access ih_fifo data in-place

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To handle 40000 to 80000 interrupts per second running CPX mode with 4
streams/queues per KFD node, KFD interrupt handler becomes the
performance bottleneck.

Remove the kfifo_out memcpy overhead by accessing ih_fifo data in-place
and updating rptr with kfifo_skip_count.

Signed-off-by: Philip Yang <Philip.Yang@amd.com>
Reviewed-by: Felix Kuehling <felix.kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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Philip Yang 2024-11-22 17:36:15 -05:00 • committed by Alex Deucher

parent 11815bb0e3

commit f607b2b867

1 changed files with 14 additions and 21 deletions

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drivers/gpu/drm/amd/amdkfd/kfd_interrupt.c

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