HomeFreeBSD

MFC r352544: Improve ioat(4) NUMA-awareness.

Description

MFC r352544: 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.

Details

Committed
mavSep 28 2019, 12:59 AM
Parents
rS352826: Implement pmap_page_is_mapped() correctly on arm64 and riscv.
Branches
Unknown
Tags
Unknown