#!/bin/bash
#
# Benchmark script:
#  - developed for benchmarking egress qdisc path, derived (more
#    like cut'n'pasted) from ingress benchmark script.
#
# Script for injecting packets into egress qdisc path of the stack
# with pktgen "xmit_mode queue_xmit".
#
setglobal basedir = $[dirname $0]
source $(basedir)/functions.sh
root_check_run_with_sudo @ARGV

# Parameter parsing via include
source $(basedir)/parameters.sh
if test -z $DEST_IP {
    test -z $IP6 && setglobal DEST_IP = '"198.18.0.42'" || setglobal DEST_IP = '"FD00::1'"
}
test -z $DST_MAC && setglobal DST_MAC = '"90:e2:ba:ff:ff:ff'"

# Burst greater than 1 are invalid for queue_xmit mode
if [[ -n "$BURST" ]] {
    err 1 "Bursting not supported for this mode"
}

# Base Config
setglobal DELAY = '"0'"        # Zero means max speed
setglobal 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 TX qdisc egress path of stack
    pg_set $dev "xmit_mode queue_xmit"
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