linux/samples/pktgen/pktgen_sample06_numa_awared_queue_irq_affinity.sh
J.J. Martzki a27ac53909 samples: pktgen: fix append mode failed issue
Each sample script sources functions.sh before parameters.sh
which makes $APPEND undefined when trapping EXIT no matter in
append mode or not. Due to this when sample scripts finished
they always do "pgctrl reset" which resets pktgen config.

So move trap to each script after sourcing parameters.sh
and trap EXIT explicitly.

Signed-off-by: J.J. Martzki <mars14850@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2023-07-03 09:15:26 +01:00

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#!/bin/bash
#
# Multiqueue: Using pktgen threads for sending on multiple CPUs
# * adding devices to kernel threads which are in the same NUMA node
# * bound devices queue's irq affinity to the threads, 1:1 mapping
# * notice the naming scheme for keeping device names unique
# * nameing scheme: dev@thread_number
# * flow variation via random UDP source port
#
basedir=`dirname $0`
source ${basedir}/functions.sh
root_check_run_with_sudo "$@"
#
# Required param: -i dev in $DEV
source ${basedir}/parameters.sh
# Trap EXIT first
trap_exit
# Base Config
[ -z "$COUNT" ] && COUNT="20000000" # Zero means indefinitely
[ -z "$CLONE_SKB" ] && CLONE_SKB="0"
# Flow variation random source port between min and max
UDP_SRC_MIN=9
UDP_SRC_MAX=109
node=`get_iface_node $DEV`
irq_array=(`get_iface_irqs $DEV`)
cpu_array=(`get_node_cpus $node`)
[ $THREADS -gt ${#irq_array[*]} -o $THREADS -gt ${#cpu_array[*]} ] && \
err 1 "Thread number $THREADS exceeds: min (${#irq_array[*]},${#cpu_array[*]})"
# (example of setting default params in your script)
if [ -z "$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"
if [ -n "$DEST_IP" ]; then
validate_addr${IP6} $DEST_IP
read -r DST_MIN DST_MAX <<< $(parse_addr${IP6} $DEST_IP)
fi
if [ -n "$DST_PORT" ]; then
read -r UDP_DST_MIN UDP_DST_MAX <<< $(parse_ports $DST_PORT)
validate_ports $UDP_DST_MIN $UDP_DST_MAX
fi
# General cleanup everything since last run
[ -z "$APPEND" ] && pg_ctrl "reset"
# Threads are specified with parameter -t value in $THREADS
for ((i = 0; i < $THREADS; i++)); do
# The device name is extended with @name, using thread number to
# make then unique, but any name will do.
# Set the queue's irq affinity to this $thread (processor)
# if '-f' is designated, offset cpu id
thread=${cpu_array[$((i+F_THREAD))]}
dev=${DEV}@${thread}
echo $thread > /proc/irq/${irq_array[$i]}/smp_affinity_list
info "irq ${irq_array[$i]} is set affinity to `cat /proc/irq/${irq_array[$i]}/smp_affinity_list`"
# Add remove all other devices and add_device $dev to thread
[ -z "$APPEND" ] && pg_thread $thread "rem_device_all"
pg_thread $thread "add_device" $dev
# select queue and bind the queue and $dev in 1:1 relationship
queue_num=$i
info "queue number is $queue_num"
pg_set $dev "queue_map_min $queue_num"
pg_set $dev "queue_map_max $queue_num"
# Notice config queue to map to cpu (mirrors smp_processor_id())
# It is beneficial to map IRQ /proc/irq/*/smp_affinity 1:1 to CPU number
pg_set $dev "flag QUEUE_MAP_CPU"
# Base config of dev
pg_set $dev "count $COUNT"
pg_set $dev "clone_skb $CLONE_SKB"
pg_set $dev "pkt_size $PKT_SIZE"
pg_set $dev "delay $DELAY"
# Flag example disabling timestamping
pg_set $dev "flag NO_TIMESTAMP"
# Destination
pg_set $dev "dst_mac $DST_MAC"
pg_set $dev "dst${IP6}_min $DST_MIN"
pg_set $dev "dst${IP6}_max $DST_MAX"
if [ -n "$DST_PORT" ]; then
# Single destination port or random port range
pg_set $dev "flag UDPDST_RND"
pg_set $dev "udp_dst_min $UDP_DST_MIN"
pg_set $dev "udp_dst_max $UDP_DST_MAX"
fi
[ ! -z "$UDP_CSUM" ] && pg_set $dev "flag UDPCSUM"
# Setup random UDP port src range
pg_set $dev "flag UDPSRC_RND"
pg_set $dev "udp_src_min $UDP_SRC_MIN"
pg_set $dev "udp_src_max $UDP_SRC_MAX"
done
# Run if user hits control-c
function print_result() {
# Print results
for ((i = 0; i < $THREADS; i++)); do
thread=${cpu_array[$((i+F_THREAD))]}
dev=${DEV}@${thread}
echo "Device: $dev"
cat /proc/net/pktgen/$dev | grep -A2 "Result:"
done
}
# trap keyboard interrupt (Ctrl-C)
trap true SIGINT
# start_run
if [ -z "$APPEND" ]; then
echo "Running... ctrl^C to stop" >&2
pg_ctrl "start"
echo "Done" >&2
print_result
else
echo "Append mode: config done. Do more or use 'pg_ctrl start' to run"
fi