From: Jesper Dangaard Brouer <brouer@redhat.com>
To: Daniel Borkmann <daniel@iogearbox.net>
Cc: Alexei Starovoitov <ast@plumgrid.com>,
netdev@vger.kernel.org, Eric Dumazet <eric.dumazet@gmail.com>,
brouer@redhat.com
Subject: Re: [PATCH v5 2/2] pktgen: introduce xmit_mode '<start_xmit|netif_receive>'
Date: Fri, 8 May 2015 17:39:00 +0200 [thread overview]
Message-ID: <20150508173900.3fcf78de@redhat.com> (raw)
In-Reply-To: <554B9CDE.1050703@iogearbox.net>
On Thu, 07 May 2015 19:11:58 +0200 Daniel Borkmann <daniel@iogearbox.net> wrote:
> On 05/07/2015 06:28 PM, Alexei Starovoitov wrote:
> > On 5/7/15 7:35 AM, Jesper Dangaard Brouer wrote:
> >> From: Alexei Starovoitov <ast@plumgrid.com>
> >>
[...snip...]
> > btw, I've started to work on a patch on top of this one that allows
> > multiple pktgen threads to submit into the same netdev.
> > I've used it to stress test removal of spin_lock in ingress qdisc.
> > The idea is to add another 'name' parameter to command:
> > 'add_device name dev'
> > 'name' will be used to identify this pktgen thread in /proc
> > and 'dev' used as target net_device.
> > I think it will be useful for start_xmit testing as well.
> > I wonder why it wasn't done earlier? The queue configuration is
> > already supported.
>
> You mean other than below commit (iow independant of queue mapping)?
>
> commit e6fce5b916cd7f7f79b2b3e53ba74bbfc1d7cf8b
> Author: Robert Olsson <robert.olsson@its.uu.se>
> Date: Thu Aug 7 02:23:01 2008 -0700
>
> pktgen: multiqueue etc.
For completeness and others reading this threads...
Pktgen multiqueue is already supported via mentioned commit, which adds
the device naming scheme: "add_device dev@number"
And yes, the documentation does not seem to mention this. I've been
using it for years now... My scripts[1] take param "-t" for "threads".
I've added a more plain version of a script, based on yours, below my
signature.
The funny thing now is that scaling does not "happen" as we stall on:
atomic_long_inc(&skb->dev->rx_dropped);
[1] https://github.com/netoptimizer/network-testing/tree/master/pktgen
- -
Best regards,
Jesper Dangaard Brouer
MSc.CS, Sr. Network Kernel Developer at Red Hat
Author of http://www.iptv-analyzer.org
LinkedIn: http://www.linkedin.com/in/brouer
multiqueue pktgen script:
#!/bin/bash
function pgset() {
local result
echo $1 > $PGDEV
result=`cat $PGDEV | fgrep "Result: OK:"`
if [ "$result" = "" ]; then
cat $PGDEV | fgrep Result:
fi
}
[ -z "$2" ] && echo "Usage: $0 DEV num_threads" && exit 1
ETH=$1
NUM_THREADS=$2
let "NUM_THREADS -= 1"
echo "Number of threads to start: $2 (0 to $NUM_THREADS)"
# General cleanup everything since last run
PGDEV=/proc/net/pktgen/pgctrl
pgset "reset"
# Add devices to threads
# Notice the naming scheme ETH@NUM
for NUM in `seq 0 $NUM_THREADS`; do
PGDEV=/proc/net/pktgen/kpktgend_${NUM}
pgset "rem_device_all"
pgset "add_device ${ETH}@${NUM}"
done
# Config each device
for NUM in `seq 0 $NUM_THREADS`; do
PGDEV=/proc/net/pktgen/${ETH}@${NUM}
pgset "flag QUEUE_MAP_CPU"
pgset "xmit_mode netif_receive"
pgset "pkt_size 60"
pgset "dst 198.18.0.42"
pgset "dst_mac 90:e2:ba:ff:ff:ff"
pgset "count 10000000"
pgset "burst 32"
done
PGDEV=/proc/net/pktgen/pgctrl
echo "Running... ctrl^C to stop"
pgset "start"
echo "Done"
for NUM in `seq 0 $NUM_THREADS`; do
echo "Device: ${ETH}@${NUM}"
cat /proc/net/pktgen/${ETH}@${NUM} | grep -A2 "Result:"
done
next prev parent reply other threads:[~2015-05-08 15:39 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-01 5:12 [PATCH v3 net-next] pktgen: introduce 'rx' mode Alexei Starovoitov
2015-05-01 16:54 ` Eric Dumazet
2015-05-02 8:46 ` Jesper Dangaard Brouer
2015-05-02 9:44 ` Daniel Borkmann
2015-05-02 9:54 ` Jesper Dangaard Brouer
2015-05-02 10:30 ` Daniel Borkmann
2015-05-02 16:01 ` Alexei Starovoitov
2015-05-02 16:46 ` Jesper Dangaard Brouer
2015-05-02 17:07 ` Alexei Starovoitov
2015-05-05 18:15 ` Jesper Dangaard Brouer
2015-05-05 18:30 ` Alexei Starovoitov
2015-05-05 20:29 ` [PATCH 0/2] pktgen changes Jesper Dangaard Brouer
2015-05-05 20:29 ` [PATCH 1/2] pktgen: adjust flag NO_TIMESTAMP to be more pktgen compliant Jesper Dangaard Brouer
2015-05-05 20:30 ` [PATCH 2/2] pktgen: introduce xmit_mode 'rx_inject' Jesper Dangaard Brouer
2015-05-06 4:33 ` Alexei Starovoitov
2015-05-06 5:24 ` Jesper Dangaard Brouer
2015-05-06 10:17 ` Daniel Borkmann
2015-05-06 11:22 ` Jesper Dangaard Brouer
2015-05-06 5:32 ` Alexander Duyck
2015-05-06 8:44 ` Jesper Dangaard Brouer
2015-05-06 14:35 ` Alexei Starovoitov
2015-05-07 14:34 ` [PATCH v5 0/2] pktgen changes Jesper Dangaard Brouer
2015-05-07 14:34 ` [PATCH v5 1/2] pktgen: adjust flag NO_TIMESTAMP to be more pktgen compliant Jesper Dangaard Brouer
2015-05-07 14:35 ` [PATCH v5 2/2] pktgen: introduce xmit_mode '<start_xmit|netif_receive>' Jesper Dangaard Brouer
2015-05-07 16:28 ` Alexei Starovoitov
2015-05-07 17:11 ` Daniel Borkmann
2015-05-07 17:16 ` Alexei Starovoitov
2015-05-07 17:20 ` Daniel Borkmann
2015-05-08 13:40 ` Multiqueue pktgen (was: [PATCH v5 2/2] pktgen: introduce xmit_mode '<start_xmit|netif_receive>') Jesper Dangaard Brouer
2015-05-08 15:39 ` Jesper Dangaard Brouer [this message]
2015-05-08 15:49 ` Multiqueue pktgen and ingress path (Was: " Jesper Dangaard Brouer
2015-05-08 15:56 ` Eric Dumazet
2015-05-08 16:53 ` Alexander Duyck
2015-05-08 17:00 ` Alexei Starovoitov
2015-05-08 18:21 ` Alexander Duyck
2015-05-08 15:57 ` [PATCH v5 2/2] pktgen: introduce xmit_mode '<start_xmit|netif_receive>' Eric Dumazet
2015-05-08 16:50 ` Alexei Starovoitov
2015-05-10 2:26 ` [PATCH v5 0/2] pktgen changes David Miller
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