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This pktgen sample script is useful for scalability testing a receiver. The script will simply generate one flow per thread (option -t N) using the thread number as part of the source IP-address. The single flow sample (pktgen_sample03_burst_single_flow.sh) have become quite popular, but it is important that developers also make sure to benchmark scalability of multiple receive queues. Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
82 lines
2.2 KiB
Bash
Executable File
82 lines
2.2 KiB
Bash
Executable File
#!/bin/bash
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#
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# Script will generate one flow per thread (-t N)
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# - Same destination IP
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# - Fake source IPs for each flow (fixed based on thread number)
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#
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# Useful for scale testing on receiver, to see whether silo'ing flows
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# works and scales. For optimal scalability (on receiver) each
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# separate-flow should not access shared variables/data. This script
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# helps magnify any of these scaling issues by overloading the receiver.
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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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# Parameter parsing via include
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source ${basedir}/parameters.sh
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# Set some default params, if they didn't get set
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[ -z "$DEST_IP" ] && DEST_IP="198.18.0.42"
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[ -z "$DST_MAC" ] && DST_MAC="90:e2:ba:ff:ff:ff"
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[ -z "$CLONE_SKB" ] && CLONE_SKB="0"
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[ -z "$BURST" ] && BURST=32
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# Base Config
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DELAY="0" # Zero means max speed
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COUNT="0" # Zero means indefinitely
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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 < $THREADS; thread++)); do
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dev=${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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# Base config
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pg_set $dev "flag QUEUE_MAP_CPU"
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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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pg_set $dev "flag NO_TIMESTAMP"
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# Single 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 source IP-addresses based on thread number
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pg_set $dev "src_min 198.18.$((thread+1)).1"
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pg_set $dev "src_max 198.18.$((thread+1)).1"
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# Setup burst, for easy testing -b 0 disable bursting
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# (internally in pktgen default and minimum burst=1)
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if [[ ${BURST} -ne 0 ]]; then
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pg_set $dev "burst $BURST"
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else
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info "$dev: Not using burst"
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fi
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done
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# Run if user hits control-c
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function print_result() {
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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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}
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# trap keyboard interrupt (Ctrl-C)
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trap true SIGINT
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echo "Running... ctrl^C to stop" >&2
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pg_ctrl "start"
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print_result
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