[mirror_ubuntu-artful-kernel.git] / samples / pktgen / pktgen_sample03_burst_single_flow.sh

#!/bin/bash
#
# Script for max single flow performance
#  - If correctly tuned[1], single CPU 10G wirespeed small pkts is possible[2]
#
# Using pktgen "burst" option (use -b $N)
#  - To boost max performance
#  - Avail since: kernel v3.18
#   * commit 38b2cf2982dc73 ("net: pktgen: packet bursting via skb->xmit_more")
#  - This avoids writing the HW tailptr on every driver xmit
#  - The performance boost is impressive, see commit and blog [2]
#
# Notice: On purpose generates a single (UDP) flow towards target,
#   reason behind this is to only overload/activate a single CPU on
#   target host.  And no randomness for pktgen also makes it faster.
#
# Tuning see:
#  [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
#
basedir=`dirname $0`
source ${basedir}/functions.sh
root_check_run_with_sudo "$@"

# Parameter parsing via include
source ${basedir}/parameters.sh
# Set some default params, if they didn't get set
if [ -z "$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 "$BURST" ]     && BURST=32
[ -z "$CLONE_SKB" ] && CLONE_SKB="100000"
[ -z "$COUNT" ]     && COUNT="0" # Zero means indefinitely

# Base Config
DELAY="0"  # Zero means max speed

# General cleanup everything since last run
pg_ctrl "reset"

# Threads are specified with parameter -t value in $THREADS
for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do
    dev=${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
    pg_set $dev "flag QUEUE_MAP_CPU"
    pg_set $dev "count $COUNT"
    pg_set $dev "clone_skb $CLONE_SKB"
    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"

    # Setup burst, for easy testing -b 0 disable bursting
    # (internally in pktgen default and minimum burst=1)
    if [[ ${BURST} -ne 0 ]]; then
	pg_set $dev "burst $BURST"
    else
	info "$dev: Not using burst"
    fi
done

# Run if user hits control-c
function control_c() {
    # Print results
    for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do
	dev=${DEV}@${thread}
	echo "Device: $dev"
	cat /proc/net/pktgen/$dev | grep -A2 "Result:"
    done
}
# trap keyboard interrupt (Ctrl-C)
trap control_c SIGINT

echo "Running... ctrl^C to stop" >&2
pg_ctrl "start"
Commit	Line	Data
1d73ba16 JDB	1	#!/bin/bash
	2	#
	3	# Script for max single flow performance
	4	# - If correctly tuned[1], single CPU 10G wirespeed small pkts is possible[2]
	5	#
	6	# Using pktgen "burst" option (use -b $N)
	7	# - To boost max performance
	8	# - Avail since: kernel v3.18
	9	# * commit 38b2cf2982dc73 ("net: pktgen: packet bursting via skb->xmit_more")
	10	# - This avoids writing the HW tailptr on every driver xmit
	11	# - The performance boost is impressive, see commit and blog [2]
	12	#
	13	# Notice: On purpose generates a single (UDP) flow towards target,
	14	# reason behind this is to only overload/activate a single CPU on
	15	# target host. And no randomness for pktgen also makes it faster.
	16	#
	17	# Tuning see:
	18	# [1] http://netoptimizer.blogspot.dk/2014/06/pktgen-for-network-overload-testing.html
	19	# [2] http://netoptimizer.blogspot.dk/2014/10/unlocked-10gbps-tx-wirespeed-smallest.html
	20	#
	21	basedir=`dirname $0`
	22	source ${basedir}/functions.sh
	23	root_check_run_with_sudo "$@"
	24
	25	# Parameter parsing via include
	26	source ${basedir}/parameters.sh
	27	# Set some default params, if they didn't get set
0f06a678 MKL	28	if [ -z "$DEST_IP" ]; then
	29	[ -z "$IP6" ] && DEST_IP="198.18.0.42" \|\| DEST_IP="FD00::1"
	30	fi
1d73ba16 JDB	31	[ -z "$DST_MAC" ] && DST_MAC="90:e2:ba:ff:ff:ff"
	32	[ -z "$BURST" ] && BURST=32
	33	[ -z "$CLONE_SKB" ] && CLONE_SKB="100000"
69137ea6	34	[ -z "$COUNT" ] && COUNT="0" # Zero means indefinitely
1d73ba16 JDB	35
	36	# Base Config
	37	DELAY="0" # Zero means max speed
1d73ba16 JDB	38
	39	# General cleanup everything since last run
	40	pg_ctrl "reset"
	41
	42	# Threads are specified with parameter -t value in $THREADS
e0e16672	43	for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do
1d73ba16 JDB	44	dev=${DEV}@${thread}
	45
	46	# Add remove all other devices and add_device $dev to thread
	47	pg_thread $thread "rem_device_all"
	48	pg_thread $thread "add_device" $dev
	49
	50	# Base config
	51	pg_set $dev "flag QUEUE_MAP_CPU"
	52	pg_set $dev "count $COUNT"
	53	pg_set $dev "clone_skb $CLONE_SKB"
	54	pg_set $dev "pkt_size $PKT_SIZE"
	55	pg_set $dev "delay $DELAY"
	56	pg_set $dev "flag NO_TIMESTAMP"
	57
	58	# Destination
	59	pg_set $dev "dst_mac $DST_MAC"
0f06a678	60	pg_set $dev "dst$IP6 $DEST_IP"
1d73ba16 JDB	61
	62	# Setup burst, for easy testing -b 0 disable bursting
	63	# (internally in pktgen default and minimum burst=1)
	64	if [[ ${BURST} -ne 0 ]]; then
	65	pg_set $dev "burst $BURST"
	66	else
	67	info "$dev: Not using burst"
	68	fi
	69	done
	70
	71	# Run if user hits control-c
	72	function control_c() {
	73	# Print results
e0e16672	74	for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do
1d73ba16 JDB	75	dev=${DEV}@${thread}
	76	echo "Device: $dev"
	77	cat /proc/net/pktgen/$dev \| grep -A2 "Result:"
	78	done
	79	}
	80	# trap keyboard interrupt (Ctrl-C)
	81	trap control_c SIGINT
	82
	83	echo "Running... ctrl^C to stop" >&2
	84	pg_ctrl "start"