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Improve ioat(4) NUMA-awareness.

Description

Improve ioat(4) NUMA-awareness.

Allocate ioat->ring memory from the device domain.
Schedule ioat->poll_timer to the first CPU of the device domain.

According to pcm-numa tool from intel-pcm port, this reduces number of
remote DRAM accesses while copying data by 75%. And unless it is a noise,
I've noticed some speed improvement when copying data to other domain.

MFC after: 1 week
Sponsored by: iXsystems, Inc.

Details

Committed
mavSep 19 2019, 10:15 PM
Parents
rS352543: vfs: group fields used for per-cpu ops in one cacheline
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