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Message-ID: <AANLkTik+T8Sv1tEmy4PU0O-dOeymJLEkEd9QOYy7ZJzC@mail.gmail.com> Date: Sat, 4 Sep 2010 10:02:36 -0400 From: Chetan Loke <chetanloke@...il.com> To: Eric Dumazet <eric.dumazet@...il.com> Cc: Bhavesh Davda <bhavesh@...are.com>, "netdev@...r.kernel.org" <netdev@...r.kernel.org>, "pv-drivers@...are.com" <pv-drivers@...are.com>, "therbert@...gle.com" <therbert@...gle.com> Subject: Re: [Pv-drivers] rps and pvdrivers On Sat, Sep 4, 2010 at 9:51 AM, Eric Dumazet <eric.dumazet@...il.com> wrote: > > If packets have same rxhash, (same src IP, dst IP, src port, dst port), > they are directed on a single CPU, and this might explain you cannot > handle the load, RPS or not. I tried incrementing the src-macs from the load-generator. Or only the above 4-tuple entries are used? > > cat /proc/net/softnet_stat > cat /proc/net/softnet_stat 0655cb87 006dd31b 00096a78 00000000 00000000 00000000 00000000 00000000 00000000 00000dbe 0042feec 00000000 0008ae33 00000000 00000000 00000000 00000000 00000000 00000000 00000000 cat /proc/net/softnet_stat 065d444e 006e669d 00097565 00000000 00000000 00000000 00000000 00000000 00000000 00000dbe 0042ff8c 00000000 0008b83f 00000000 00000000 00000000 00000000 00000000 00000000 00000000 cat /proc/net/softnet_stat 066a6fcf 006fefd9 000988c9 00000000 00000000 00000000 00000000 00000000 00000000 00000dbe 004300bd 00000000 0008c945 00000000 00000000 00000000 00000000 00000000 00000000 00000000 > RPS is good to handle multiple flows, because it can distribute load on > several cpus. But with a single flow, I guess it might be not that > useful. For single flow if it doesn't improve performance that's fine. But it should atleast work as good as N-2(2.6.33). Chetan Loke -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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