* Barriers per second while doing Odirect Random Writes
@ 2010-04-26 7:06 Keith Mannthey
0 siblings, 0 replies; only message in thread
From: Keith Mannthey @ 2010-04-26 7:06 UTC (permalink / raw)
To: linux-ext4@vger.kernel.org
Ted and all,
While using this FFSB test profile:
http://btrfs.boxacle.net/repository/raid/2010-04-14_2004//ext4-2.6.34-rc3-nobarrier//btrfs1.ffsb.random_writes_odirect__threads_0128.10-04-21_17.38.39/benchmark/profile
(The profile is 128 threads of all odirect random writes. )
on my raid box I am seeing (via Darricks block_barrier tracepoint) right
about 32 barriers per second.
Initial analysis using perf shows kdmflush as the cause. I will continue
to look into this.
Thanks,
Keith Mannthey
LTC FS-Dev
^ permalink raw reply [flat|nested] only message in thread
only message in thread, other threads:[~2010-04-26 7:06 UTC | newest]
Thread overview: (only message) (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2010-04-26 7:06 Barriers per second while doing Odirect Random Writes Keith Mannthey
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).