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Re: TSO not working?
On Fri, Oct 28, 2011 at 02:24:04PM -0400, Thor Lancelot Simon wrote:
> > I added a sc_ev_txlargetso, which gets incremented by:
> > if (m0->m_pkthdr.len > 32768)
> > WM_EVCNT_INCR(&sc->sc_ev_txlargetso);
> It'd be interesting, perhaps, to see how often we were actually even > 1500.
I added this:
if (m0->m_pkthdr.len >= 32768)
if (m0->m_pkthdr.len >= 16384)
if (m0->m_pkthdr.len >= 1500)
and here's the results:
for ttcp against a NetBSD client:
wm0 txtso 188555 695 misc
wm0 txtsomtu 188555 695 misc
wm0 txtsomedium 92 0 misc
wm0 txtsolarge 4 0 misc
glusterfs against a NetBSD client:
wm0 txtso 114607 690 misc
wm0 txtsomtu 114607 690 misc
wm0 txtsomedium 1496 9 misc
wm0 txtsolarge 709 4 misc
glusterfs against a linux client:
wm0 txtso 86567 1185 misc
wm0 txtsomtu 86567 1185 misc
wm0 txtsomedium 6897 94 misc
wm0 txtsolarge 2391 32 misc
> > ttcp -t -l65536 -b524288 -D xen1-priv < /glpool/truc
> > (64k writes but a 512k TCP buffer) I get no "largetso".
> Does the window ever have 32K of space, I wonder? Maybe the delay is
> not large enough to ever let it open that wide.
We should have this in the trace ?
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
NetBSD: 26 ans d'experience feront toujours la difference
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