On Fri, Aug 25, 2017 at 09:33:35AM -0600, Warner Losh wrote: > On Fri, Aug 25, 2017 at 7:35 AM, Slawa Olhovchenkov <s...@zxy.spb.ru> wrote: > > > On Thu, Aug 24, 2017 at 10:11:10PM +0000, Warner Losh wrote: > > > > > Author: imp > > > Date: Thu Aug 24 22:11:10 2017 > > > New Revision: 322863 > > > URL: https://svnweb.freebsd.org/changeset/base/322863 > > > > > > Log: > > > Expand the latency tracking array from 1.024s to 8.192s to help track > > > extreme outliers from dodgy drives. Adjust comments to reflect this, > > > and make sure that the number of latency buckets match in the two > > > places where it matters. > > > > May be up to 1min? > > > > I'm not sure what additional data you'll get between "totally sucks, at > least 8s latency" and "totally sucks, at least 32s." or "totally sucks, at > least 64s" though the latter isn't possible with the default timeouts... > > I'm planning on adding a 'max' latency that's self-resetting instead of > expanding the bucket upwards. I'm also contemplating expanding it down to > 100us or even 10us since nda serves nvme drives which easily can be sub > 100us.
This is just stat data? Don't produce error messages about timeout commands and etc? _______________________________________________ svn-src-head@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
