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test: qdisc_prio_hol - latency testing via {TCP.UDP}_RR
This is an extention to tcp_upload_prio, that uses TCP_RR and UDP_RR for measuring the latency, based on feedback from Eric Dumazet and Tom Herbert. This should be considered a experimental test as it is still under development. Some results will be published under: http://people.netfilter.org/hawk/qdisc/experiment01/ Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
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‎tests/qdisc_prio_hol.conf

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## -*- mode: python; coding: utf-8 -*-
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# [***NOTICE: TEST STILL UNDER DEVELOPMENT MIGHT CHANGE***]
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include("netperf_definitions.inc")
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DESCRIPTION="Qdisc prio testing Head-of-Line latency"
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#
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# This is an extention to tcp_upload_prio, that uses TCP_RR and UDP_RR
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# for measuring the latency.
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#
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# Special care need to be take for using this on the default
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# qdisc MQ which have pfifo_fast assigned to every HW queue.
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#
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# Setup requirements
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# 1. IRQ align CPUs to NIC HW queues
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# E.g. via: set_irq_affinity ethX
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# From: https://github.com/netoptimizer/network-testing/
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#
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# 2. Force netperf-wrapper subcommands to run the same CPU
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# E.g: taskset -c 2 ./netperf-wrapper -H IP qdisc_prio_hol
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#
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# This will force all measurements to go through the same qdisc. This
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# is needed so the ping/latency tests measures the real property of
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# the qdisc and Head-of-Line blocking effect.
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DEFAULTS={'PLOT': 'totals'}
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DATA_SETS = o([
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('TCP upload1',
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{'command': find_netperf("TCP_STREAM", LENGTH, HOST),
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'delay': DELAY,
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'units': 'Mbits/s',
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'runner': 'netperf_demo',}),
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# ('TCP upload2',
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# {'command': find_netperf("TCP_STREAM", LENGTH, HOST),
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# 'delay': DELAY,
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# 'units': 'Mbits/s',
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# 'runner': 'netperf_demo',}),
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# 0x08 => TOS-"throughput" (Kernel: TC_PRIO_BULK qdisc prio band:2 )
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('UDP upload1',
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{'command': find_netperf("UDP_STREAM", LENGTH, HOST,
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marking="0x08,0x08",
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# Avoid sending IP fragments 1500 bytes - 28 bytes (IP+UDP hdr)
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extra_args="-- -m 1472"),
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'delay': DELAY,
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'units': 'Mbits/s',
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'runner': 'netperf_demo',}),
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# With disabled GSO and TSO, it is difficult to saturate
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# 10Gbit/s link bandwidth, but a UDP_STREAM (which default
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# uses) IP fragments it helps. Problem is this will be
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# saturated in case GSO or TSO is enabled, resulting in a
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# empty dataset and possibly an error on command line.
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#
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('UDP upload2',
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{'command': find_netperf("UDP_STREAM", LENGTH, HOST,
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marking="0x08,0x08",
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# Avoid sending IP fragments 1500 bytes - 28 bytes (IP+UDP hdr)
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# extra_args="-- -m 1472"
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),
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'delay': DELAY,
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'units': 'Mbits/s',
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'runner': 'netperf_demo',}),
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('Upload total',
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{'apply_to': [glob("* upload*")],
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'units': 'Mbits/s',
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'runner': 'sum',}),
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('Ping (ms) ICMP',
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{'command': find_ping(IP_VERSION, STEP_SIZE, TOTAL_LENGTH, HOST),
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'units': 'ms',
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'runner': 'ping',}),
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('Ping (ms) ICMP PRIO',
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{'command': find_ping(IP_VERSION, STEP_SIZE, TOTAL_LENGTH, HOST, marking="0x10"),
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'units': 'ms',
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'runner': 'ping',}),
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('Ping (ms) UDP PRIO',
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{'command': find_netperf("UDP_RR", TOTAL_LENGTH, HOST, marking="0x10,0x10"),
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'data_transform': 'rr_to_ms',
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'units': 'ms',
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'runner': 'netperf_demo',}),
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# 0x10 => TOS-"lowdelay" (Kernel: TC_PRIO_INTERACTIVE qdisc prio band:0 )
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('Ping (ms) TCP PRIO',
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{'command': find_netperf("TCP_RR", TOTAL_LENGTH, HOST, marking="0x10,0x10"),
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'data_transform': 'rr_to_ms',
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'units': 'ms',
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'runner': 'netperf_demo',}),
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('Ping (ms) avg',
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{'apply_to': [glob("Ping (ms)*")],
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'units': 'ms',
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'runner': 'average',}),
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])
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PLOTS = o([
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('totals',
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{'description': 'Bandwidth and ping plot',
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'type': 'timeseries',
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'dual_axes': True,
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'axis_labels': ['Bandwidth (Mbit/s)','Latency (ms)'],
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'series': [{'data' : 'TCP upload1',
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'label': 'TCP upload1 (MBit/s)'},
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# {'data' : 'TCP upload2',
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# 'label': 'TCP upload2 (MBit/s)'},
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{'data' : 'UDP upload1',
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'label': 'UDP upload1 (MBit/s)'},
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{'data' : 'UDP upload2',
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'label': 'UDP upload2 (MBit/s)'},
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{'data': 'Upload total',
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'label': 'Total Upload (Mbit/s)',
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'smoothing': 10,
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'color': 'green',
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'linewidth': 3},
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{'data': 'Ping (ms) ICMP',
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'label': 'Ping (ms)',
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'axis': 2},
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{'data': 'Ping (ms) ICMP PRIO',
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'label': 'Ping hi-prio (ms)',
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'axis': 2},
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{'data': 'Ping (ms) UDP PRIO',
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'label': 'UDP-latency (ms) hi-prio',
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'axis': 2},
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{'data': 'Ping (ms) TCP PRIO',
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'label': 'TCP-latency (ms) hi-prio',
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'axis': 2},
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{'data': 'Ping (ms) avg',
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'label': 'Avg Ping (ms)',
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'smoothing': 10,
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'color': 'black',
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'linewidth': 2,
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'axis': 2},
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]
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}
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),
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('ping',
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{'description': 'Ping plot',
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'type': 'timeseries',
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'legend_title': 'Ping (ms)',
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'axis_labels': ['Latency (ms)'],
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'series': [{'data': 'Ping (ms) ICMP',
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'label': 'ICMP'},
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{'data': 'Ping (ms) ICMP PRIO',
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'label': 'Ping hi-prio'},
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{'data': 'Ping (ms) avg',
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'label': 'Avg',
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'smoothing': 10,
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'color': 'black',
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'linewidth': 2},
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{'data': 'Ping (ms) UDP PRIO',
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'label': 'UDP-latency (ms) hi-prio'},
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{'data': 'Ping (ms) TCP PRIO',
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'label': 'TCP-latency (ms) hi-prio'},
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]}),
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('ping_hiprio',
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{'description': 'Ping plot hi-prio',
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'type': 'timeseries',
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'legend_title': 'Ping (ms)',
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'axis_labels': ['Latency (ms)'],
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'series': [
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{'data': 'Ping (ms) ICMP PRIO',
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'label': 'Ping hi-prio'},
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{'data': 'Ping (ms) ICMP PRIO',
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'label': 'Ping hi-prio (smoothed)',
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'smoothing': 10,
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'linewidth': 2},
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{'data': 'Ping (ms) UDP PRIO',
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'label': 'UDP-latency (ms) hi-prio'},
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{'data': 'Ping (ms) TCP PRIO',
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'label': 'TCP-latency (ms) hi-prio'},
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]}),
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('ping_cdf',
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{'description': 'Ping CDF plot',
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'type': 'cdf',
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'axis_labels': ['Latency (ms)'],
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'parent': 'ping',
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'cutoff': (DELAY,DELAY)}),
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('rr_latency',
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{'description': 'Latency derived from TCP_RR and UDP_RR',
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'type': 'timeseries',
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'legend_title': 'Latency (ms)',
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'axis_labels': ['Latency (ms)'],
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'series': [
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{'data': 'Ping (ms) UDP PRIO',
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'label': 'UDP-latency (ms) hi-prio'},
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{'data': 'Ping (ms) TCP PRIO',
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'label': 'TCP-latency (ms) hi-prio'},
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]}),
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('box_totals',
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{'description': 'Box plot of totals',
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'parent': 'totals',
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'type': 'box',}),
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])

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