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2015-05-22pktgen: add benchmark script pktgen_bench_xmit_mode_netif_receive.shJesper Dangaard Brouer1-0/+86
This script pktgen_bench_xmit_mode_netif_receive.sh is a benchmark script, which can be used for benchmarking part of the network stack. This can be used for performance improving or catching regression in that area. The script is developed for benchmarking ingress qdisc path, original idea by Alexei Starovoitov. This script don't really need any hardware. This is achieved via the recently introduced stack inject feature "xmit_mode netif_receive". See commit 62f64aed622b6 ("pktgen: introduce xmit_mode '<start_xmit|netif_receive>'"). Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-05-22pktgen: add sample script pktgen_sample03_burst_single_flow.shJesper Dangaard Brouer1-0/+82
Add the pktgen samples script pktgen_sample03_burst_single_flow.sh that demonstrates how to acheive maximum performance. If correctly tuned[1] single CPU 10Gbit/s wirespeed small pkts is possible[2] which is 14.88Mpps. The trick is to take advantage of the "burst" feature introduced in commit 38b2cf2982dc73 ("net: pktgen: packet bursting via skb->xmit_more"). [1] http://netoptimizer.blogspot.dk/2014/06/pktgen-for-network-overload-testing.html [2] http://netoptimizer.blogspot.dk/2014/10/unlocked-10gbps-tx-wirespeed-smallest.html Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-05-22pktgen: add sample script pktgen_sample02_multiqueue.shJesper Dangaard Brouer3-139/+75
Add the pktgen samples script pktgen_sample02_multiqueue.sh that demonstrates generating packets on multiqueue NICs. Specifically notice the options "-t" that specifies how many kernel threads to activate. Also notice the flag QUEUE_MAP_CPU, which cause the SKB TX queue to be mapped to the CPU running the kernel thread. For best scalability people are also encourage to map NIC IRQ /proc/irq/*/smp_affinity to CPU number. Usage example with "-t" 4 threads and help: ./pktgen_sample02_multiqueue.sh -i eth4 -m 00:1B:21:3C:9D:F8 -t 4 Usage: ./pktgen_sample02_multiqueue.sh [-vx] -i ethX -i : ($DEV) output interface/device (required) -s : ($PKT_SIZE) packet size -d : ($DEST_IP) destination IP -m : ($DST_MAC) destination MAC-addr -t : ($THREADS) threads to start -c : ($SKB_CLONE) SKB clones send before alloc new SKB -b : ($BURST) HW level bursting of SKBs -v : ($VERBOSE) verbose -x : ($DEBUG) debug Removing pktgen.conf-2-1 and pktgen.conf-2-2 as these examples should be covered now. Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-05-22pktgen: add sample script pktgen_sample01_simple.shJesper Dangaard Brouer2-59/+71
Add the first basic pktgen samples script pktgen_sample01_simple.sh, which demonstrates the a simple use of the helper functions. Removing pktgen.conf-1-1 as that example should be covered now. The naming scheme pktgen_sampleNN, where NN is a number, should encourage reading the samples in a specific order. Script cause pktgen sending with a single thread and single interface, and introduce flow variation via random UDP source port. Usage example and help: ./pktgen_sample01_simple.sh -i eth4 -m 00:1B:21:3C:9D:F8 -d 192.168.8.2 Usage: ./pktgen_sample01_simple.sh [-vx] -i ethX -i : ($DEV) output interface/device (required) -s : ($PKT_SIZE) packet size -d : ($DEST_IP) destination IP -m : ($DST_MAC) destination MAC-addr -c : ($SKB_CLONE) SKB clones send before alloc new SKB -v : ($VERBOSE) verbose -x : ($DEBUG) debug Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-05-22pktgen: new pktgen helper functions for samples scriptsJesper Dangaard Brouer3-0/+261
Preparing for removing existing samples/pktgen/ scripts, and replacing these with easier to use samples. This commit provides two helper shell files, that can be "included" by shell source'ing. Namely "functions.sh" and "parameters.sh". The parameters.sh file support easy and consistant parameter parsing across the sample scripts. Usage example is printed on errors. The functions.sh file provides, three new shell functions for configuring the different components of pktgen: pg_ctrl(), pg_thread() and pg_set(). A slightly improved version of the old pgset() function is also provided for backwards compat. The new functions correspond to pktgens different components. * pg_ctrl() control "pgctrl" (/proc/net/pktgen/pgctrl) * pg_thread() control the kernel threads and binding to devices * pg_set() control setup of individual devices These changes are borrowed from: https://github.com/netoptimizer/network-testing/tree/master/pktgen Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-02-23samples/pktgen: Show the results rather than just commenting where they areBen Hutchings8-16/+8
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-02-23samples/pktgen: Trap SIGINTBen Hutchings8-0/+8
Otherwise ^C stops the script, not just pktgen. Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-02-23samples/pktgen: Use bash as interpreterBen Hutchings8-8/+8
These scripts use the non-POSIX 'function' and 'local' keywords so they won't work with every /bin/sh. We could drop 'function' as it is a no-op, but 'local' makes for cleaner scripts. Require use of bash. Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-02-23samples/pktgen: Remove setting of obsolete max_before_softirq parameterBen Hutchings8-18/+0
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-02-23samples/pktgen: Correct comments about the thread configBen Hutchings8-8/+9
They all claimed to be two CPU examples using eth1, eth2 but that is only true in one case! Rob Jones pointed out spelling and grammar errors here, which I've also corrected. Cc: Rob Jones <rob.jones@codethink.co.uk> Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-02-23samples/pktgen: Delete unused function pg()Ben Hutchings8-40/+0
This function is not used and wouldn't do anything useful as pktgen does not have an 'inject' command. Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-02-23samples/pktgen: Add sample scripts for pktgen facilityBen Hutchings8-0/+578
These are Robert Olsson's samples which used to be available from <ftp://robur.slu.se/pub/Linux/net-development/pktgen-testing/examples/> but currently are not. Change the documentation to refer to these consistently as 'sample scripts', matching the directory name used here. Cc: Robert Olsson <robert@herjulf.se> Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk> Signed-off-by: David S. Miller <davem@davemloft.net>

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