From: Eric Dumazet <eric.dumazet@gmail.com>
To: Dave Taht <dave.taht@gmail.com>
Cc: jg@freedesktop.org, Stephen Hemminger <shemminger@vyatta.com>,
Juliusz Chroboczek <jch@pps.jussieu.fr>,
Kathleen Nichols <nichols@pollere.com>,
netdev <netdev@vger.kernel.org>
Subject: Re: BQL + Basic Latency under load results - 100Mbit, GSO/TSO off, pfifo_fast vs SFQ vs QFQ
Date: Mon, 02 Jan 2012 06:07:41 +0100 [thread overview]
Message-ID: <1325480861.2526.15.camel@edumazet-laptop> (raw)
In-Reply-To: <1325480125.2526.13.camel@edumazet-laptop>
Le lundi 02 janvier 2012 à 05:55 +0100, Eric Dumazet a écrit :
> I tested this patch with a 50 concurrent netperf workload, and indeed
> this fixes the problem for me.
>
> # ping 192.168.20.108
> PING 192.168.20.108 (192.168.20.108) 56(84) bytes of data.
> 64 bytes from 192.168.20.108: icmp_req=1 ttl=64 time=0.021 ms
> 64 bytes from 192.168.20.108: icmp_req=2 ttl=64 time=0.011 ms
> 64 bytes from 192.168.20.108: icmp_req=3 ttl=64 time=0.011 ms
> 64 bytes from 192.168.20.108: icmp_req=4 ttl=64 time=0.010 ms
> 64 bytes from 192.168.20.108: icmp_req=5 ttl=64 time=0.010 ms
> 64 bytes from 192.168.20.108: icmp_req=6 ttl=64 time=0.010 ms
>
Oops, pinging a real machine, not myself I get more realistic numbers :)
# ping -c 20 192.168.20.112
PING 192.168.20.112 (192.168.20.112) 56(84) bytes of data.
64 bytes from 192.168.20.112: icmp_req=1 ttl=64 time=0.488 ms
64 bytes from 192.168.20.112: icmp_req=2 ttl=64 time=0.214 ms
64 bytes from 192.168.20.112: icmp_req=3 ttl=64 time=0.696 ms
64 bytes from 192.168.20.112: icmp_req=4 ttl=64 time=0.135 ms
64 bytes from 192.168.20.112: icmp_req=5 ttl=64 time=0.110 ms
64 bytes from 192.168.20.112: icmp_req=6 ttl=64 time=0.401 ms
64 bytes from 192.168.20.112: icmp_req=7 ttl=64 time=0.378 ms
64 bytes from 192.168.20.112: icmp_req=8 ttl=64 time=0.384 ms
64 bytes from 192.168.20.112: icmp_req=9 ttl=64 time=1.03 ms
64 bytes from 192.168.20.112: icmp_req=10 ttl=64 time=0.439 ms
64 bytes from 192.168.20.112: icmp_req=11 ttl=64 time=0.126 ms
64 bytes from 192.168.20.112: icmp_req=12 ttl=64 time=0.093 ms
64 bytes from 192.168.20.112: icmp_req=13 ttl=64 time=0.834 ms
64 bytes from 192.168.20.112: icmp_req=14 ttl=64 time=0.696 ms
64 bytes from 192.168.20.112: icmp_req=15 ttl=64 time=0.776 ms
64 bytes from 192.168.20.112: icmp_req=16 ttl=64 time=0.215 ms
64 bytes from 192.168.20.112: icmp_req=17 ttl=64 time=0.262 ms
64 bytes from 192.168.20.112: icmp_req=18 ttl=64 time=0.554 ms
64 bytes from 192.168.20.112: icmp_req=19 ttl=64 time=0.373 ms
64 bytes from 192.168.20.112: icmp_req=20 ttl=64 time=0.666 ms
--- 192.168.20.112 ping statistics ---
20 packets transmitted, 20 received, 0% packet loss, time 19000ms
rtt min/avg/max/mdev = 0.093/0.443/1.035/0.264 ms
next prev parent reply other threads:[~2012-01-02 5:08 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CAA93jw6r45zBn4p76R9-2UNdp=OM+uiYqPKcKnjqBReR_oh1BA@mail.gmail.com>
[not found] ` <CAA93jw5JjVBQOFL=td55rOpXbUYc=uT_rjeY04O137g_-tBJHw@mail.gmail.com>
[not found] ` <CAA93jw7bLnHtVnZGN5wVPQZc46XT_B--cY1ocUbnm1AS=J_YHw@mail.gmail.com>
2012-01-02 4:33 ` BQL + Basic Latency under load results - 100Mbit, GSO/TSO off, pfifo_fast vs SFQ vs QFQ Eric Dumazet
2012-01-02 4:55 ` Eric Dumazet
2012-01-02 5:07 ` Eric Dumazet [this message]
2012-01-02 5:27 ` Eric Dumazet
2012-01-03 17:52 ` David Miller
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