mirror of
https://github.com/torvalds/linux.git
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98 lines
3.0 KiB
Bash
98 lines
3.0 KiB
Bash
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#!/bin/bash
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#
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# Multiqueue: Using pktgen threads for sending on multiple CPUs
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# * adding devices to kernel threads which are in the same NUMA node
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# * bound devices queue's irq affinity to the threads, 1:1 mapping
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# * notice the naming scheme for keeping device names unique
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# * nameing scheme: dev@thread_number
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# * flow variation via random UDP source port
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#
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basedir=`dirname $0`
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source ${basedir}/functions.sh
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root_check_run_with_sudo "$@"
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#
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# Required param: -i dev in $DEV
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source ${basedir}/parameters.sh
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# Base Config
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DELAY="0" # Zero means max speed
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[ -z "$COUNT" ] && COUNT="20000000" # Zero means indefinitely
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[ -z "$CLONE_SKB" ] && CLONE_SKB="0"
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# Flow variation random source port between min and max
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UDP_MIN=9
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UDP_MAX=109
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node=`get_iface_node $DEV`
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irq_array=(`get_iface_irqs $DEV`)
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cpu_array=(`get_node_cpus $node`)
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[ $THREADS -gt ${#irq_array[*]} -o $THREADS -gt ${#cpu_array[*]} ] && \
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err 1 "Thread number $THREADS exceeds: min (${#irq_array[*]},${#cpu_array[*]})"
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# (example of setting default params in your script)
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if [ -z "$DEST_IP" ]; then
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[ -z "$IP6" ] && DEST_IP="198.18.0.42" || DEST_IP="FD00::1"
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fi
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[ -z "$DST_MAC" ] && DST_MAC="90:e2:ba:ff:ff:ff"
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# General cleanup everything since last run
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pg_ctrl "reset"
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# Threads are specified with parameter -t value in $THREADS
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for ((i = 0; i < $THREADS; i++)); do
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# The device name is extended with @name, using thread number to
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# make then unique, but any name will do.
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# Set the queue's irq affinity to this $thread (processor)
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# if '-f' is designated, offset cpu id
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thread=${cpu_array[$((i+F_THREAD))]}
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dev=${DEV}@${thread}
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echo $thread > /proc/irq/${irq_array[$i]}/smp_affinity_list
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info "irq ${irq_array[$i]} is set affinity to `cat /proc/irq/${irq_array[$i]}/smp_affinity_list`"
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# Add remove all other devices and add_device $dev to thread
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pg_thread $thread "rem_device_all"
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pg_thread $thread "add_device" $dev
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# select queue and bind the queue and $dev in 1:1 relationship
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queue_num=$i
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info "queue number is $queue_num"
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pg_set $dev "queue_map_min $queue_num"
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pg_set $dev "queue_map_max $queue_num"
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# Notice config queue to map to cpu (mirrors smp_processor_id())
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# It is beneficial to map IRQ /proc/irq/*/smp_affinity 1:1 to CPU number
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pg_set $dev "flag QUEUE_MAP_CPU"
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# Base config of dev
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pg_set $dev "count $COUNT"
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pg_set $dev "clone_skb $CLONE_SKB"
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pg_set $dev "pkt_size $PKT_SIZE"
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pg_set $dev "delay $DELAY"
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# Flag example disabling timestamping
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pg_set $dev "flag NO_TIMESTAMP"
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# Destination
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pg_set $dev "dst_mac $DST_MAC"
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pg_set $dev "dst$IP6 $DEST_IP"
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# Setup random UDP port src range
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pg_set $dev "flag UDPSRC_RND"
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pg_set $dev "udp_src_min $UDP_MIN"
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pg_set $dev "udp_src_max $UDP_MAX"
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done
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# start_run
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echo "Running... ctrl^C to stop" >&2
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pg_ctrl "start"
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echo "Done" >&2
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# Print results
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for ((i = 0; i < $THREADS; i++)); do
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thread=${cpu_array[$((i+F_THREAD))]}
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dev=${DEV}@${thread}
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echo "Device: $dev"
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cat /proc/net/pktgen/$dev | grep -A2 "Result:"
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done
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