On Thu, Nov 26, 2009 at 08:06:13AM +0100, Bart Van Assche wrote: > On Wed, Nov 25, 2009 at 5:57 PM, Shachar f <shacharf...@gmail.com> wrote: > > I'm running open-iscsi with scst on Broadcom 10Gig network and facing write > > latency issues. > > When using netperf over an idle network the latency for a single block round > > trip transfer is 30 usec and with open-iscsi it is 90-100 usec. > > > > I see that Nagle (TCP_NODELAY) is disabled when openning socket on the > > initiator side and I'm not sure about the target side. > > Vlad, Can you elaborate on this? > > > > Are others in the mailing list aware to possible environment changes that > > effext latency? > > > > more info - > > I'm running this test with Centos5.3 machines with almost latest open-iscsi. > > Please make sure that interrupt coalescing has been disabled -- see > also ethtool -c. >
Did you ever figure out the problem for the additional latency? -- Pasi -- You received this message because you are subscribed to the Google Groups "open-iscsi" group. To post to this group, send email to open-is...@googlegroups.com. To unsubscribe from this group, send email to open-iscsi+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/open-iscsi?hl=en.