Re: [PATCH] virtio_blk: Drop unused request tracking list
From: Stefan Hajnoczi <hidden>
Date: 2012-03-30 10:14:22
Also in:
kvm
On Fri, Mar 30, 2012 at 4:24 AM, Asias He [off-list ref] wrote:
Benchmark shows small performance improvement on fusion io device. Before: seq-read : io=1,024MB, bw=19,982KB/s, iops=39,964, runt= 52475msec seq-write: io=1,024MB, bw=20,321KB/s, iops=40,641, runt= 51601msec rnd-read : io=1,024MB, bw=15,404KB/s, iops=30,808, runt= 68070msec rnd-write: io=1,024MB, bw=14,776KB/s, iops=29,552, runt= 70963msec After: seq-read : io=1,024MB, bw=20,343KB/s, iops=40,685, runt= 51546msec seq-write: io=1,024MB, bw=20,803KB/s, iops=41,606, runt= 50404msec rnd-read : io=1,024MB, bw=16,221KB/s, iops=32,442, runt= 64642msec rnd-write: io=1,024MB, bw=15,199KB/s, iops=30,397, runt= 68991msec Signed-off-by: Asias He <redacted> --- drivers/block/virtio_blk.c | 10 ---------- 1 files changed, 0 insertions(+), 10 deletions(-)
Thanks for providing performance results. It's a bit scary that this unused list has an impact...I'm sure we have worse things elsewhere in the KVM storage code path. Reviewed-by: Stefan Hajnoczi <redacted>