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Date: Wed, 22 Dec 2010 09:15:52 -0800 From: Jon Zhou <Jon.Zhou@...u.com> To: Jon Zhou <Jon.Zhou@...u.com>, Eric Dumazet <eric.dumazet@...il.com> CC: "juice@...gman.org" <juice@...gman.org>, Stephen Hemminger <shemminger@...tta.com>, "netdev@...r.kernel.org" <netdev@...r.kernel.org> Subject: RE: Using ethernet device as efficient small packet generator -----Original Message----- From: Jon Zhou Sent: Thursday, December 23, 2010 12:53 AM To: 'Eric Dumazet' Cc: juice@...gman.org; Stephen Hemminger; netdev@...r.kernel.org Subject: RE: Using ethernet device as efficient small packet generator -----Original Message----- From: Eric Dumazet [mailto:eric.dumazet@...il.com] Sent: Wednesday, December 22, 2010 11:59 PM To: Jon Zhou Cc: juice@...gman.org; Stephen Hemminger; netdev@...r.kernel.org Subject: RE: Using ethernet device as efficient small packet generator Le mercredi 22 décembre 2010 à 07:48 -0800, Jon Zhou a écrit : > > Hi eric, any special setting in pktgen.conf? > > PGDEV=/proc/net/pktgen/kpktgend_0 > echo "Removing all devices" > pgset "rem_device_all" > echo "Adding eth1-fp-0" //or eth1? eth1 > pgset "add_device eth1" > echo "Setting max_before_softirq 10000" > pgset "max_before_softirq 10000" Not sure you need to tweak max_before_softirq (I never did) > > All things I need to do is set cpu affinity and start 8 pktgen threads? (PGDEV=/proc/net/pktgen/kpktgend_0~7 with "eth1") Yes, but you must also use queue_map_min and queue_map_max pktgen parameters so that each cpu manipulates its own 'queue' CPU 0 : pgset "queue_map_min 0" pgset "queue_map_max 0" ... CPU 3 : pgset "queue_map_min 3" pgset "queue_map_max 3" PGDEV=/proc/net/pktgen/kpktgend_0 echo "Removing all devices" pgset "rem_device_all" echo "Adding eth4" pgset "add_device eth4" echo "Setting max_before_softirq 10000" pgset "queue_map_min 0" pgset "queue_map_max 0" --> It said: queue_map_min 0 ./pktgen.conf-8-1: line 10: echo: write error: Invalid argument queue_map_max 0 ./pktgen.conf-8-1: line 10: echo: write error: Invalid argument Forgot to tell the kernel is 2.6.32 PGDEV=/proc/net/pktgen/eth4 echo "Configuring $PGDEV" pgset "$COUNT" pgset "$CLONE_SKB" pgset "$PKT_SIZE" pgset "$DELAY" pgset "dst 10.10.11.2" pgset "queue_map_min 0" pgset "queue_map_max 7" pgset "dst_mac 00:04:23:08:91:dc" ->it is ok Here is the top result, why only kpktgend_0 is running? Eric,can you share the pktgen script? Thank you top - 00:43:59 up 7:00, 6 users, load average: 0.95, 0.66, 0.51 Tasks: 8 total, 1 running, 7 sleeping, 0 stopped, 0 zombie Cpu(s): 0.0%us, 3.2%sy, 0.0%ni, 86.1%id, 0.1%wa, 0.0%hi, 10.6%si, 0.0%st Mem: 32228M total, 933M used, 31295M free, 97M buffers Swap: 2055M total, 0M used, 2055M free, 138M cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 8806 root 20 0 0 0 0 R 100 0.0 5:27.12 kpktgend_0 8807 root 20 0 0 0 0 S 0 0.0 0:00.00 kpktgend_1 8808 root 20 0 0 0 0 S 0 0.0 0:00.00 kpktgend_2 8810 root 20 0 0 0 0 S 0 0.0 0:00.00 kpktgend_3 8811 root 20 0 0 0 0 S 0 0.0 0:00.00 kpktgend_4 8812 root 20 0 0 0 0 S 0 0.0 0:00.00 kpktgend_5 8813 root 20 0 0 0 0 S 0 0.0 0:00.00 kpktgend_6 8814 root 20 0 0 0 0 S 0 0.0 0:00.00 kpktgend_7 Already set affinity: cat /proc/interrupts |grep eth4 78: 10625257 0 0 0 0 0 0 0 IR-PCI-MSI-edge eth4-TxRx-0 79: 10451 581007 0 0 0 0 0 0 IR-PCI-MSI-edge eth4-TxRx-1 80: 10447 0 535185 0 0 0 0 0 IR-PCI-MSI-edge eth4-TxRx-2 81: 10441 0 0 575911 0 0 0 0 IR-PCI-MSI-edge eth4-TxRx-3 82: 10444 0 0 0 521068 0 0 0 IR-PCI-MSI-edge eth4-TxRx-4 83: 10448 0 0 0 0 564710 0 0 IR-PCI-MSI-edge eth4-TxRx-5 84: 10429 0 0 0 0 0 516087 0 IR-PCI-MSI-edge eth4-TxRx-6 85: 10444 0 0 0 0 0 0 558530 IR-PCI-MSI-edge eth4-TxRx-7 86: 2 0 0 0 0 0 0 0 IR-PCI-MSI-edge eth4:lsc
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