Messages in this thread | | | From | David Mosberger <> | Date | Tue, 3 Jun 2003 21:35:55 -0700 | Subject | Re: fix TCP roundtrip time update code |
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>>>>> On Tue, 03 Jun 2003 20:23:20 -0700 (PDT), "David S. Miller" <davem@redhat.com> said:
DaveM> From: Nivedita Singhvi <niv@us.ibm.com> Date: Tue, 03 Jun DaveM> 2003 19:01:25 -0700 DaveM> But, FYI, DaveM and Alexey, we tried reproducing the DaveM> stalls we (Dave Hansen, Troy Wilson) had seen during DaveM> SpecWeb99 runs and couldn't reproduce them on 2.5.69. (Same DaveM> config, etc). So its possible our hang/stalls were some other DaveM> issue that got silently fixed (or more likely, possibly the DaveM> same thing but other changes minimized us running into the DaveM> problem).
DaveM> I think this means nothing, and that you can infer nothing DaveM> from such results.
DaveM> My understanding is that the problem case triggers only when DaveM> a timeout based retransmit occurs. On LAN this tends to be DaveM> extremely rare. Although under enough traffic load it can DaveM> occur.
DaveM> So if your old SpecWEB99 lab tended more to trigger timeout DaveM> based retransmits on LAN, and your new test network does not, DaveM> then your new test network will tend to not reproduce the bug DaveM> regardless of whether the bug is present in the kernel or not DaveM> :-)
Is this where I get to plug httperf? It triggered the bug reliably in less than 10 secs. ;-)
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