From: Stefano Brivio <sbrivio@redhat.com>
To: David Gibson <david@gibson.dropbear.id.au>
Cc: Jon Maloy <jmaloy@redhat.com>,
passt-dev@passt.top, dgibson@redhat.com, lvivier@redhat.com
Subject: Re: Problematic throughput numbers
Date: Thu, 26 Sep 2024 05:45:52 +0200 [thread overview]
Message-ID: <20240926054552.23969872@elisabeth> (raw)
In-Reply-To: <ZvS_9b-fCqhYDj4e@zatzit.fritz.box>
On Thu, 26 Sep 2024 11:59:17 +1000
David Gibson <david@gibson.dropbear.id.au> wrote:
> On Wed, Sep 25, 2024 at 12:36:43PM -0400, Jon Maloy wrote:
> > I made many runs with iperf3 ns->host, and the results are puzzling me.
> > Over and over again, I see throughput practically collapse, with a two
> > orders of magnitude decrease.
> > Just to make sure this wasn't something introduced by me, I went back to the
> > master branch and disabled the SO_PEEK_OFF feature.
> > The result was the same.
> > The below log shows typical run, but it is highly variable.
> > Sometimes almost the whole series is in the 50-70 Gb/s range, and sometimes
> > almost all in the 100-300 Mb/s range.
> > When I added the kernel fix it didn't seem to make any difference.
> >
> > To me this is really worrying, and should be investigated.
>
> Those numbers are certainly worrying. Like Stefano, though, I have
...not...?
> encountered this myself.
--
Stefano
next prev parent reply other threads:[~2024-09-26 3:46 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-09-25 16:36 Problematic throughput numbers Jon Maloy
2024-09-25 17:47 ` Stefano Brivio
2024-09-26 1:59 ` David Gibson
2024-09-26 3:45 ` Stefano Brivio [this message]
2024-09-26 3:50 ` David Gibson
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