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Add the pktgen samples script pktgen_sample02_multiqueue.sh that demonstrates generating packets on multiqueue NICs. Specifically notice the options "-t" that specifies how many kernel threads to activate. Also notice the flag QUEUE_MAP_CPU, which cause the SKB TX queue to be mapped to the CPU running the kernel thread. For best scalability people are also encourage to map NIC IRQ /proc/irq/*/smp_affinity to CPU number. Usage example with "-t" 4 threads and help: ./pktgen_sample02_multiqueue.sh -i eth4 -m 00:1B:21:3C:9D:F8 -t 4 Usage: ./pktgen_sample02_multiqueue.sh [-vx] -i ethX -i : ($DEV) output interface/device (required) -s : ($PKT_SIZE) packet size -d : ($DEST_IP) destination IP -m : ($DST_MAC) destination MAC-addr -t : ($THREADS) threads to start -c : ($SKB_CLONE) SKB clones send before alloc new SKB -b : ($BURST) HW level bursting of SKBs -v : ($VERBOSE) verbose -x : ($DEBUG) debug Removing pktgen.conf-2-1 and pktgen.conf-2-2 as these examples should be covered now. Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
76 lines
2.1 KiB
Bash
Executable File
76 lines
2.1 KiB
Bash
Executable File
#!/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
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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 ${basedir}/parameters.sh
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# Base Config
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DELAY="0" # Zero means max speed
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COUNT="100000" # Zero means indefinitely
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[ -z "$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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# (example of setting default params in your script)
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[ -z "$DEST_IP" ] && DEST_IP="198.18.0.42"
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[ -z "$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 ((thread = 0; thread < $THREADS; thread++)); do
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# The device name is extended with @name, using thread number to
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# make then unique, but any name will do.
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dev=${DEV}@${thread}
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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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# 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 $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 ((thread = 0; thread < $THREADS; thread++)); do
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dev=${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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