#!/bin/bash
#
# Benchmark script:
#  - developed for benchmarking ingress qdisc path
#
# Script for injecting packets into RX path of the stack with pktgen
# "xmit_mode netif_receive".  With an invalid dst_mac this will only
# measure the ingress code path as packets gets dropped in ip_rcv().
#
# This script don't really need any hardware.  It benchmarks software
# RX path just after NIC driver level.  With bursting is also
# "removes" the SKB alloc/free overhead.
#
# Setup scenarios for measuring ingress qdisc (with invalid dst_mac):
# ------------------------------------------------------------------
# (1) no ingress (uses static_key_false(&ingress_needed))
#
# (2) ingress on other dev (change ingress_needed and calls
#     handle_ing() but exit early)
#
#  config:  tc qdisc add dev $SOMEDEV handle ffff: ingress
#
# (3) ingress on this dev, handle_ing() -> tc_classify()
#
#  config:  tc qdisc add dev $DEV handle ffff: ingress
#
# (4) ingress on this dev + drop at u32 classifier/action.
#
basedir=`dirname $0`
source ${basedir}/functions.sh
root_check_run_with_sudo "$@"

# Parameter parsing via include
source ${basedir}/parameters.sh
# Using invalid DST_MAC will cause the packets to get dropped in
# ip_rcv() which is part of the test
if [ -z "$DEST_IP" ]; then
    [ -z "$IP6" ] && DEST_IP="198.18.0.42" || DEST_IP="FD00::1"
fi
[ -z "$DST_MAC" ] && DST_MAC="90:e2:ba:ff:ff:ff"
[ -z "$BURST" ] && BURST=1024

# Base Config
DELAY="0"        # Zero means max speed
COUNT="10000000" # Zero means indefinitely

# General cleanup everything since last run
pg_ctrl "reset"

# Threads are specified with parameter -t value in $THREADS
for ((thread = 0; thread < $THREADS; thread++)); do
    # The device name is extended with @name, using thread number to
    # make then unique, but any name will do.
    dev=${DEV}@${thread}

    # Add remove all other devices and add_device $dev to thread
    pg_thread $thread "rem_device_all"
    pg_thread $thread "add_device" $dev

    # Base config of dev
    pg_set $dev "flag QUEUE_MAP_CPU"
    pg_set $dev "count $COUNT"
    pg_set $dev "pkt_size $PKT_SIZE"
    pg_set $dev "delay $DELAY"
    pg_set $dev "flag NO_TIMESTAMP"

    # Destination
    pg_set $dev "dst_mac $DST_MAC"
    pg_set $dev "dst$IP6 $DEST_IP"

    # Inject packet into RX path of stack
    pg_set $dev "xmit_mode netif_receive"

    # Burst allow us to avoid measuring SKB alloc/free overhead
    pg_set $dev "burst $BURST"
done

# start_run
echo "Running... ctrl^C to stop" >&2
pg_ctrl "start"
echo "Done" >&2

# Print results
for ((thread = 0; thread < $THREADS; thread++)); do
    dev=${DEV}@${thread}
    echo "Device: $dev"
    cat /proc/net/pktgen/$dev | grep -A2 "Result:"
done
ref='/cgit.cgi/linux/net-next.git/commit/net?id=1db175428ee374489448361213e9c3b749d14900'>net</a>/<a href='/cgit.cgi/linux/net-next.git/commit/net/ipv4?id=1db175428ee374489448361213e9c3b749d14900'>ipv4</a>/<a href='/cgit.cgi/linux/net-next.git/commit/net/ipv4/tcp_westwood.c?id=1db175428ee374489448361213e9c3b749d14900'>tcp_westwood.c</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='1db175428ee374489448361213e9c3b749d14900'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Jan Kara &lt;jack@suse.cz&gt;</td><td class='right'>2016-10-21 11:33:49 +0200</td></tr>
<tr><th>committer</th><td>Dan Williams &lt;dan.j.williams@intel.com&gt;</td><td class='right'>2016-12-26 20:29:25 -0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/ipv4/tcp_westwood.c?id=1db175428ee374489448361213e9c3b749d14900'>1db175428ee374489448361213e9c3b749d14900</a> (<a href='/cgit.cgi/linux/net-next.git/patch/net/ipv4/tcp_westwood.c?id=1db175428ee374489448361213e9c3b749d14900'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=1db175428ee374489448361213e9c3b749d14900'>32e4eebdad84d1c6e84508186b0f1fb63df7bdfc</a> /<a href='/cgit.cgi/linux/net-next.git/tree/net/ipv4/tcp_westwood.c?id=1db175428ee374489448361213e9c3b749d14900'>net/ipv4/tcp_westwood.c</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/ipv4/tcp_westwood.c?id=9f141d6ef6258a3a37a045842d9ba7e68f368956'>9f141d6ef6258a3a37a045842d9ba7e68f368956</a> (<a href='/cgit.cgi/linux/net-next.git/diff/net/ipv4/tcp_westwood.c?id=1db175428ee374489448361213e9c3b749d14900&amp;id2=9f141d6ef6258a3a37a045842d9ba7e68f368956'>diff</a>)</td></tr></table>
<div class='commit-subject'>ext4: Simplify DAX fault path</div><div class='commit-msg'>Now that dax_iomap_fault() calls -&gt;iomap_begin() without entry lock, we
can use transaction starting in ext4_iomap_begin() and thus simplify
ext4_dax_fault(). It also provides us proper retries in case of ENOSPC.

Signed-off-by: Jan Kara &lt;jack@suse.cz&gt;
Signed-off-by: Dan Williams &lt;dan.j.williams@intel.com&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=1db175428ee374489448361213e9c3b749d14900'>Diffstat</a> (limited to 'net/ipv4/tcp_westwood.c')</div><table summary='diffstat' class='diffstat'>