| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Mon, 23 Nov 2009 11:21:12 +0100
From: Eric Dumazet <eric.dumazet@...il.com>
To: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@...el.com>
CC: Linux Netdev List <netdev@...r.kernel.org>
Subject: ixgbe question
Hi Peter
I tried a pktgen stress on 82599EB card and could not split RX load on multiple cpus.
Setup is :
One 82599 card with fiber0 looped to fiber1, 10Gb link mode.
machine is a HPDL380 G6 with dual quadcore E5530 @2.4GHz (16 logical cpus)
I use one pktgen thread sending to fiber0 one many dst IP, and checked that fiber1
was using many RX queues :
grep fiber1 /proc/interrupts
117: 1301 13060 0 0 0 0 0 0 0 0 0 0 0 0 0 0 PCI-MSI-edge fiber1-TxRx-0
118: 601 1402 0 0 0 0 0 0 0 0 0 0 0 0 0 0 PCI-MSI-edge fiber1-TxRx-1
119: 634 832 0 0 0 0 0 0 0 0 0 0 0 0 0 0 PCI-MSI-edge fiber1-TxRx-2
120: 601 1303 0 0 0 0 0 0 0 0 0 0 0 0 0 0 PCI-MSI-edge fiber1-TxRx-3
121: 620 1246 0 0 0 0 0 0 0 0 0 0 0 0 0 0 PCI-MSI-edge fiber1-TxRx-4
122: 1287 13088 0 0 0 0 0 0 0 0 0 0 0 0 0 0 PCI-MSI-edge fiber1-TxRx-5
123: 606 1354 0 0 0 0 0 0 0 0 0 0 0 0 0 0 PCI-MSI-edge fiber1-TxRx-6
124: 653 827 0 0 0 0 0 0 0 0 0 0 0 0 0 0 PCI-MSI-edge fiber1-TxRx-7
125: 639 825 0 0 0 0 0 0 0 0 0 0 0 0 0 0 PCI-MSI-edge fiber1-TxRx-8
126: 596 1199 0 0 0 0 0 0 0 0 0 0 0 0 0 0 PCI-MSI-edge fiber1-TxRx-9
127: 2013 24800 0 0 0 0 0 0 0 0 0 0 0 0 0 0 PCI-MSI-edge fiber1-TxRx-10
128: 648 1353 0 0 0 0 0 0 0 0 0 0 0 0 0 0 PCI-MSI-edge fiber1-TxRx-11
129: 601 1123 0 0 0 0 0 0 0 0 0 0 0 0 0 0 PCI-MSI-edge fiber1-TxRx-12
130: 625 834 0 0 0 0 0 0 0 0 0 0 0 0 0 0 PCI-MSI-edge fiber1-TxRx-13
131: 665 1409 0 0 0 0 0 0 0 0 0 0 0 0 0 0 PCI-MSI-edge fiber1-TxRx-14
132: 2637 31699 0 0 0 0 0 0 0 0 0 0 0 0 0 0 PCI-MSI-edge fiber1-TxRx-15
133: 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 PCI-MSI-edge fiber1:lsc
But only one CPU (CPU1) had a softirq running, 100%, and many frames were dropped
root@...odl380g6:/usr/src# ifconfig fiber0
fiber0 Link encap:Ethernet HWaddr 00:1b:21:4a:fe:54
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
Packets reçus:4 erreurs:0 :0 overruns:0 frame:0
TX packets:309291576 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 lg file transmission:1000
Octets reçus:1368 (1.3 KB) Octets transmis:18557495682 (18.5 GB)
root@...odl380g6:/usr/src# ifconfig fiber1
fiber1 Link encap:Ethernet HWaddr 00:1b:21:4a:fe:55
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
Packets reçus:55122164 erreurs:0 :254169411 overruns:0 frame:0
TX packets:4 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 lg file transmission:1000
Octets reçus:3307330968 (3.3 GB) Octets transmis:1368 (1.3 KB)
How and when multi queue rx can really start to use several cpus ?
Thanks
Eric
pktgen script :
pgset()
{
local result
echo $1 > $PGDEV
result=`cat $PGDEV | fgrep "Result: OK:"`
if [ "$result" = "" ]; then
cat $PGDEV | fgrep Result:
fi
}
pg()
{
echo inject > $PGDEV
cat $PGDEV
}
PGDEV=/proc/net/pktgen/kpktgend_4
echo "Adding fiber0"
pgset "add_device fiber0@0"
CLONE_SKB="clone_skb 15"
PKT_SIZE="pkt_size 60"
COUNT="count 100000000"
DELAY="delay 0"
PGDEV=/proc/net/pktgen/fiber0@0
echo "Configuring $PGDEV"
pgset "$COUNT"
pgset "$CLONE_SKB"
pgset "$PKT_SIZE"
pgset "$DELAY"
pgset "queue_map_min 0"
pgset "queue_map_max 7"
pgset "dst_min 192.168.0.2"
pgset "dst_max 192.168.0.250"
pgset "src_min 192.168.0.1"
pgset "src_max 192.168.0.1"
pgset "dst_mac 00:1b:21:4a:fe:55"
# Time to run
PGDEV=/proc/net/pktgen/pgctrl
echo "Running... ctrl^C to stop"
pgset "start"
echo "Done"
# Result can be vieved in /proc/net/pktgen/fiber0@0
for f in fiber0@0
do
cat /proc/net/pktgen/$f
done
--
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
Powered by blists - more mailing lists