powerpc/powernv/npu: Add a debugfs setting to change ATSD threshold

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The threshold at which it becomes more efficient to coalesce a range
of ATSDs into a single per-PID ATSD is currently not well understood
due to a lack of real-world work loads. This patch adds a debugfs
parameter allowing the threshold to be altered at runtime in order to
aid future development and refinement of the value.

Signed-off-by: Alistair Popple <alistair@popple.id.au>
Acked-by: Balbir Singh <bsingharora@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

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Alistair Popple 2018-04-17 19:11:29 +10:00 • committed by Michael Ellerman

parent d69ccc00c4

commit 99c3ce33a0

1 changed files with 10 additions and 2 deletions

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arch/powerpc/platforms/powernv/npu-dma.c

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