Eric Lee / smarc-fsl-linux-kernel

02 Nov, 2017

1 commit

  • b24413180   License cleanup: add SPDX GPL-2.0 license identifier to files with no license ... Browse Code »

    Many source files in the tree are missing licensing information, which
    makes it harder for compliance tools to determine the correct license.

    By default all files without license information are under the default
    license of the kernel, which is GPL version 2.

    Update the files which contain no license information with the 'GPL-2.0'
    SPDX license identifier. The SPDX identifier is a legally binding
    shorthand, which can be used instead of the full boiler plate text.

    This patch is based on work done by Thomas Gleixner and Kate Stewart and
    Philippe Ombredanne.

    How this work was done:

    Patches were generated and checked against linux-4.14-rc6 for a subset of
    the use cases:
    - file had no licensing information it it.
    - file was a */uapi/* one with no licensing information in it,
    - file was a */uapi/* one with existing licensing information,

    Further patches will be generated in subsequent months to fix up cases
    where non-standard license headers were used, and references to license
    had to be inferred by heuristics based on keywords.

    The analysis to determine which SPDX License Identifier to be applied to
    a file was done in a spreadsheet of side by side results from of the
    output of two independent scanners (ScanCode & Windriver) producing SPDX
    tag:value files created by Philippe Ombredanne. Philippe prepared the
    base worksheet, and did an initial spot review of a few 1000 files.

    The 4.13 kernel was the starting point of the analysis with 60,537 files
    assessed. Kate Stewart did a file by file comparison of the scanner
    results in the spreadsheet to determine which SPDX license identifier(s)
    to be applied to the file. She confirmed any determination that was not
    immediately clear with lawyers working with the Linux Foundation.

    Criteria used to select files for SPDX license identifier tagging was:
    - Files considered eligible had to be source code files.
    - Make and config files were included as candidates if they contained >5
    lines of source
    - File already had some variant of a license header in it (even if
    Reviewed-by: Philippe Ombredanne
    Reviewed-by: Thomas Gleixner
    Signed-off-by: Greg Kroah-Hartman

    Greg Kroah-Hartman
     

17 Jun, 2017

2 commits

21 Jul, 2016

1 commit

  • 0f06a6787   samples: Add an IPv6 '-6' option to the pktgen scripts ... Browse Code »

    Add a '-6' option to the sample pktgen scripts for sending out
    IPv6 packets.

    [root@kerneldev010.prn1 ~/pktgen]# ./pktgen_sample03_burst_single_flow.sh -i eth0 -s 64 -d fe80::f652:14ff:fec2:a14c -m f4:52:14:c2:a1:4c -b 32 -6

    [root@kerneldev011.prn1 ~]# tcpdump -i eth0 -nn -c3 port 9
    tcpdump: WARNING: eth0: no IPv4 address assigned
    tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
    listening on eth0, link-type EN10MB (Ethernet), capture size 65535 bytes
    14:38:51.815297 IP6 fe80::f652:14ff:fec2:2ad2.9 > fe80::f652:14ff:fec2:a14c.9: UDP, length 16
    14:38:51.815311 IP6 fe80::f652:14ff:fec2:2ad2.9 > fe80::f652:14ff:fec2:a14c.9: UDP, length 16
    14:38:51.815313 IP6 fe80::f652:14ff:fec2:2ad2.9 > fe80::f652:14ff:fec2:a14c.9: UDP, length 16

    Signed-off-by: Martin KaFai Lau
    Acked-by: Alexei Starovoitov
    Signed-off-by: David S. Miller

    Martin KaFai Lau
     

15 Jul, 2016

3 commits

  • d3c937bb4   pktgen: remove sample script pktgen.conf-1-1-rdos ... Browse Code »

    Removing the pktgen sample script pktgen.conf-1-1-rdos, because
    it does not contain anything that is not covered by the other and
    newer style sample scripts.

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

    Jesper Dangaard Brouer
     
  • d25692e4b   pktgen: add sample script pktgen_sample05_flow_per_thread.sh ... Browse Code »

    This pktgen sample script is useful for scalability testing a
    receiver. The script will simply generate one flow per
    thread (option -t N) using the thread number as part of the
    source IP-address.

    The single flow sample (pktgen_sample03_burst_single_flow.sh)
    have become quite popular, but it is important that developers
    also make sure to benchmark scalability of multiple receive
    queues.

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

    Jesper Dangaard Brouer
     
  • 15f2cbbde   pktgen: add sample script pktgen_sample04_many_flows.sh ... Browse Code »

    Adding a pktgen sample script that demonstrates how to use pktgen
    for simulating flows. Script will generate a certain number of
    concurrent flows ($FLOWS) and each flow will contain $FLOWLEN
    packets, which will be send back-to-back, before switching to a
    new flow, due to flag FLOW_SEQ.

    This script obsoletes the old sample script 'pktgen.conf-1-1-flows',
    which is removed.

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

    Jesper Dangaard Brouer
     

05 Jul, 2016

1 commit

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