Eric Lee / smarc-fsl-linux-kernel

23 May, 2015

5 commits

  • 05a14d5e1   pktgen: add benchmark script pktgen_bench_xmit_mode_netif_receive.sh ... Browse Code »

    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 ''").

    Signed-off-by: Jesper Dangaard Brouer
    Signed-off-by: David S. Miller

    Jesper Dangaard Brouer
     
  • 1d73ba16a   pktgen: add sample script pktgen_sample03_burst_single_flow.sh ... Browse Code »

    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
    Signed-off-by: David S. Miller

    Jesper Dangaard Brouer
     
  • 282fb5894   pktgen: add sample script pktgen_sample02_multiqueue.sh ... Browse Code »

    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
    Signed-off-by: David S. Miller

    Jesper Dangaard Brouer
     
  • 6f0947975   pktgen: add sample script pktgen_sample01_simple.sh ... Browse Code »

    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
    Signed-off-by: David S. Miller

    Jesper Dangaard Brouer
     
  • b64b0d1e6   pktgen: new pktgen helper functions for samples scripts ... Browse Code »

    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
    Signed-off-by: David S. Miller

    Jesper Dangaard Brouer
     

24 Feb, 2015

7 commits