diff options
Diffstat (limited to 'tools/pkt_gen/ixia')
| -rwxr-xr-x | tools/pkt_gen/ixia/ixia.py | 3 | ||||
| -rwxr-xr-x | tools/pkt_gen/ixia/pass_fail.tcl | 760 |
2 files changed, 2 insertions, 761 deletions
diff --git a/tools/pkt_gen/ixia/ixia.py b/tools/pkt_gen/ixia/ixia.py index cd14a2a7..e36517d6 100755 --- a/tools/pkt_gen/ixia/ixia.py +++ b/tools/pkt_gen/ixia/ixia.py @@ -131,7 +131,8 @@ class Ixia(trafficgen.ITrafficGenerator): Runs different traffic generator tests through an Ixia traffic generator chassis by generating TCL scripts from templates. """ - _script = os.path.join(os.path.dirname(__file__), 'pass_fail.tcl') + _script = os.path.join(settings.getValue('TRAFFICGEN_IXIA_3RD_PARTY'), + 'pass_fail.tcl') _tclsh = tkinter.Tcl() _logger = logging.getLogger(__name__) diff --git a/tools/pkt_gen/ixia/pass_fail.tcl b/tools/pkt_gen/ixia/pass_fail.tcl deleted file mode 100755 index 79b7f10d..00000000 --- a/tools/pkt_gen/ixia/pass_fail.tcl +++ /dev/null @@ -1,760 +0,0 @@ -#!/usr/bin/env tclsh - -# Copyright (c) 2014, Ixia -# Copyright (c) 2015-2016, Intel Corporation -# All rights reserved. -# -# Redistribution and use in source and binary forms, with or without -# modification, are permitted provided that the following conditions -# are met: -# -# 1. Redistributions of source code must retain the above copyright -# notice, this list of conditions and the following disclaimer. -# -# 2. Redistributions in binary form must reproduce the above copyright -# notice, this list of conditions and the following disclaimer in the -# documentation and/or other materials provided with the distribution. -# -# 3. Neither the name of the copyright holder nor the names of its -# contributors may be used to endorse or promote products derived -# from this software without specific prior written permission. -# -# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS -# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT -# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS -# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE -# COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, -# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, -# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; -# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER -# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT -# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN -# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE -# POSSIBILITY OF SUCH DAMAGE. - -# This file is a modified version of a script generated by Ixia -# IxExplorer. - -lappend auto_path [list $lib_path] - -package req IxTclHal - -################################################################### -########################## Configuration ########################## -################################################################### - -# Verify that the IXIA chassis spec is given - -set reqVars [list "host" "card" "port1" "port2"] - -foreach var $reqVars { - set var_ns [namespace which -variable "$var"] - if { [string compare $var_ns ""] == 0 } { - errorMsg "The '$var' variable is undefined. Did you set it?" - return -1 - } -} - -# constants - -set fullHex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set hexToC5 "000102030405060708090A0B0C0D0E0F101112131415161718191A1B1C1D1E1F202122232425262728292A2B2C2D2E2F303132333435363738393A3B3C3D3E3F404142434445464748494A4B4C4D4E4F505152535455565758595A5B5C5D5E5F606162636465666768696A6B6C6D6E6F707172737475767778797A7B7C7D7E7F808182838485868788898A8B8C8D8E8F909192939495969798999A9B9C9D9E9FA0A1A2A3A4A5A6A7A8A9AAABACADAEAFB0B1B2B3B4B5B6B7B8B9BABBBCBDBEBFC0C1C2C3C4C5" - -#set payloadLookup(64) [string range $fullHex 0 11] -set payloadLookup(64) "000102030405" -set payloadLookup(128) "000102030405060708090A0B0C0D0E0F101112131415161718191A1B1C1D1E1F202122232425262728292A2B2C2D2E2F303132333435363738393A3B3C3D3E3F404142434445" -set payloadLookup(256) "$hexToC5" -set payloadLookup(512) "$fullHex$hexToC5" -set payloadLookup(1024) "$fullHex$fullHex$fullHex$hexToC5" - -################################################################### -###################### Chassis Configuration ###################### -################################################################### - -if {[isUNIX]} { - if {[ixConnectToTclServer $host]} { - errorMsg "Error connecting to Tcl Server $host" - return $::TCL_ERROR - } -} - -######### Chassis ######### - -# Now connect to the chassis -if [ixConnectToChassis $host] { - ixPuts $::ixErrorInfo - return 1 -} - -# Get the chassis ID to use in port lists -set chassis [ixGetChassisID $host] - -######### Ports ######### - -set portList [list [list $chassis $card $port1] \ - [list $chassis $card $port2]] - -# Clear ownership of the ports we’ll use -if [ixClearOwnership $portList force] { - ixPuts $::ixErrorInfo - return 1 -} - -# Take ownership of the ports we’ll use -if [ixTakeOwnership $portList] { - ixPuts $::ixErrorInfo - return 1 -} - -foreach portElem $portList { - set chasNum [lindex $portElem 0] - set cardNum [lindex $portElem 1] - set portNum [lindex $portElem 2] - - port setFactoryDefaults $chasNum $cardNum $portNum - port config -speed 10000 - port config -flowControl true - port config -transmitMode portTxModeAdvancedScheduler - port config -receiveMode [expr $::portCapture|$::portRxModeWidePacketGroup] - port config -advertise100FullDuplex false - port config -advertise100HalfDuplex false - port config -advertise10FullDuplex false - port config -advertise10HalfDuplex false - port config -portMode port10GigLanMode - port config -enableTxRxSyncStatsMode true - port config -txRxSyncInterval 2000 - port config -enableTransparentDynamicRateChange true - port config -enableDynamicMPLSMode true - if {[port set $chasNum $cardNum $portNum]} { - errorMsg "Error calling port set $chasNum $cardNum $portNum" - } - - packetGroup setDefault - packetGroup config -numTimeBins 1 - if {[packetGroup setRx $chasNum $cardNum $portNum]} { - errorMsg "Error calling packetGroup setRx $chasNum $cardNum $portNum" - } - - sfpPlus setDefault - sfpPlus config -enableAutomaticDetect false - sfpPlus config -txPreTapControlValue 1 - sfpPlus config -txMainTapControlValue 63 - sfpPlus config -txPostTapControlValue 2 - sfpPlus config -rxEqualizerControlValue 0 - if {[sfpPlus set $chasNum $cardNum $portNum]} { - errorMsg "Error calling sfpPlus set $chasNum $cardNum $portNum" - } - - filter setDefault - filter config -captureTriggerFrameSizeFrom 48 - filter config -captureTriggerFrameSizeTo 48 - filter config -captureFilterFrameSizeFrom 48 - filter config -captureFilterFrameSizeTo 48 - filter config -userDefinedStat1FrameSizeFrom 48 - filter config -userDefinedStat1FrameSizeTo 48 - filter config -userDefinedStat2FrameSizeFrom 48 - filter config -userDefinedStat2FrameSizeTo 48 - filter config -asyncTrigger1FrameSizeFrom 48 - filter config -asyncTrigger1FrameSizeTo 48 - filter config -asyncTrigger2FrameSizeFrom 48 - filter config -asyncTrigger2FrameSizeTo 48 - filter config -userDefinedStat1Enable true - filter config -userDefinedStat2Enable true - filter config -asyncTrigger1Enable true - filter config -asyncTrigger2Enable true - if {[filter set $chasNum $cardNum $portNum]} { - errorMsg "Error calling filter set $chasNum $cardNum $portNum" - } - - filterPallette setDefault - filterPallette config -pattern1 00 - filterPallette config -patternMask1 00 - filterPallette config -patternOffset1 20 - filterPallette config -patternOffset2 20 - if {[filterPallette set $chasNum $cardNum $portNum]} { - errorMsg "Error calling filterPallette set $chasNum $cardNum $portNum" - } - - capture setDefault - capture config -sliceSize 65536 - if {[capture set $chasNum $cardNum $portNum]} { - errorMsg "Error calling capture set $chasNum $cardNum $portNum" - } - - if {[interfaceTable select $chasNum $cardNum $portNum]} { - errorMsg "Error calling interfaceTable select $chasNum $cardNum $portNum" - } - - interfaceTable setDefault - if {[interfaceTable set]} { - errorMsg "Error calling interfaceTable set" - } - - interfaceTable clearAllInterfaces - if {[interfaceTable write]} { - errorMsg "Error calling interfaceTable write" - } - - ixEnablePortIntrinsicLatencyAdjustment $chasNum $cardNum $portNum true -} - -ixWritePortsToHardware portList - -if {[ixCheckLinkState $portList] != 0} { - errorMsg "One or more port links are down" -} - -proc sendTraffic { flowSpec trafficSpec } { - # Send traffic from IXIA. - # - # Transmits traffic from Rx port (port1), and captures traffic at - # Tx port (port2). - # - # Parameters: - # flowSpec - a dict detailing how the packet should be sent. Should be - # of format: - # {type, numpkts, duration, framerate} - # trafficSpec - a dict describing the packet to be sent. Should be - # of format: - # { l2, vlan, l3} - # where each item is in turn a dict detailing the configuration of each - # layer of the packet - # Returns: - # Output from Rx end of Ixia if duration != 0, else 0 - - ################################################## - ################# Initialisation ################# - ################################################## - - # Configure global variables. See documentation on 'global' for more - # information on why this is necessary - # https://www.tcl.tk/man/tcl8.5/tutorial/Tcl13.html - global portList - - # Extract the provided dictionaries to local variables to simplify the - # rest of the script - - # flow spec - - set streamType [dict get $flowSpec type] - set numPkts [dict get $flowSpec numpkts] - set duration [expr {[dict get $flowSpec duration] * 1000}] - set frameRate [dict get $flowSpec framerate] - - # traffic spec - - # extract nested dictionaries - set trafficSpec_l2 [dict get $trafficSpec l2] - set trafficSpec_l3 [dict get $trafficSpec l3] - set trafficSpec_l4 [dict get $trafficSpec l4] - set trafficSpec_vlan [dict get $trafficSpec vlan] - - set frameSize [dict get $trafficSpec_l2 framesize] - set srcMac [dict get $trafficSpec_l2 srcmac] - set dstMac [dict get $trafficSpec_l2 dstmac] - set srcPort [dict get $trafficSpec_l4 srcport] - set dstPort [dict get $trafficSpec_l4 dstport] - - set proto [dict get $trafficSpec_l3 proto] - set srcIp [dict get $trafficSpec_l3 srcip] - set dstIp [dict get $trafficSpec_l3 dstip] - - if {[dict exists $trafficSpec_l3 protocolpadbytes]} { - set protocolPad [dict get $trafficSpec_l4 protocolpad] - set protocolPadBytes [dict get $trafficSpec_l4 protocolpadbytes] - } - - set vlanEnabled [dict get $trafficSpec_vlan enabled] - if {$vlanEnabled == 1 } { - # these keys won't exist if vlan wasn't enabled - set vlanId [dict get $trafficSpec_vlan id] - set vlanUserPrio [dict get $trafficSpec_vlan priority] - set vlanCfi [dict get $trafficSpec_vlan cfi] - } - - ################################################## - ##################### Streams #################### - ################################################## - - streamRegion get $::chassis $::card $::port1 - if {[streamRegion enableGenerateWarningList $::chassis $::card $::port1 false]} { - errorMsg "Error calling streamRegion enableGenerateWarningList $::chassis $::card $::port1 false" - } - - set streamId 1 - - stream setDefault - stream config -ifg 9.6 - stream config -ifgMIN 19.2 - stream config -ifgMAX 25.6 - stream config -ibg 9.6 - stream config -isg 9.6 - stream config -rateMode streamRateModePercentRate - stream config -percentPacketRate $frameRate - stream config -framesize $frameSize - stream config -frameType "08 00" - stream config -sa $srcMac - stream config -da $dstMac - stream config -numSA 16 - stream config -numDA 16 - stream config -asyncIntEnable true - stream config -dma $streamType - stream config -numBursts 1 - stream config -numFrames $numPkts - stream config -patternType incrByte - stream config -dataPattern x00010203 - stream config -pattern "00 01 02 03" - - protocol setDefault - protocol config -name ipV4 - protocol config -ethernetType ethernetII - if {$vlanEnabled == 1} { - protocol config -enable802dot1qTag vlanSingle - } - - if {[info exists protocolPad]} { - protocol config -enableProtocolPad $protocolPad - } - - ip setDefault - ip config -ipProtocol ipV4Protocol[string totitle $proto] - ip config -checksum "f6 75" - ip config -sourceIpAddr $srcIp - ip config -sourceIpAddrRepeatCount 10 - ip config -sourceClass classA - ip config -destIpAddr $dstIp - ip config -destIpAddrRepeatCount 10 - ip config -destClass classA - ip config -destMacAddr $dstMac - ip config -destDutIpAddr 0.0.0.0 - ip config -ttl 64 - if {[ip set $::chassis $::card $::port1]} { - errorMsg "Error calling ip set $::chassis $::card $::port1" - } - - "$proto" setDefault - "$proto" config -checksum "25 81" - if {["$proto" set $::chassis $::card $::port1]} { - errorMsg "Error calling $proto set $::chassis $::card $::port" - } - - if {[info exists protocolPad]} { - protocolPad setDefault - # VxLAN header with VNI 99 (0x63) - # Inner SRC 01:02:03:04:05:06 - # Inner DST 06:05:04:03:02:01 - # IP SRC 192.168.0.2 - # IP DST 192.168.240.9 - # SRC port 3000 (0x0BB8) - # DST port 3001 (0x0BB9) - # length 26 - # UDP Checksum 0x2E93 - - # From encap case capture - protocolPad config -dataBytes "$protocolPadBytes" - if {[protocolPad set $::chassis $::card $::port1]} { - errorMsg "Error calling protocolPad set $::chassis $::card $::port" - set retCode $::TCL_ERROR - } - } - - if {$vlanEnabled == 1 } { - vlan setDefault - vlan config -vlanID $vlanId - vlan config -userPriority $vlanUserPrio - vlan config -cfi $vlanCfi - vlan config -mode vIdle - vlan config -repeat 10 - vlan config -step 1 - vlan config -maskval "0000XXXXXXXXXXXX" - vlan config -protocolTagId vlanProtocolTag8100 - } - - if {[vlan set $::chassis $::card $::port1]} { - errorMsg "Error calling vlan set $::chassis $::card $::port1" - } - - if {[port isValidFeature $::chassis $::card $::port1 $::portFeatureTableUdf]} { - tableUdf setDefault - tableUdf clearColumns - if {[tableUdf set $::chassis $::card $::port1]} { - errorMsg "Error calling tableUdf set $::chassis $::card $::port1" - } - } - - if {[port isValidFeature $::chassis $::card $::port1 $::portFeatureRandomFrameSizeWeightedPair]} { - weightedRandomFramesize setDefault - if {[weightedRandomFramesize set $::chassis $::card $::port1]} { - errorMsg "Error calling weightedRandomFramesize set $::chassis $::card $::port1" - } - } - - if {$proto == "tcp"} { - tcp setDefault - tcp config -sourcePort $srcPort - tcp config -destPort $dstPort - if {[tcp set $::chassis $::card $::port1 ]} { - errorMsg "Error setting tcp on port $::chassis.$::card.$::port1" - } - - if {$vlanEnabled != 1} { - udf setDefault - udf config -repeat 1 - udf config -continuousCount true - udf config -initval {00 00 00 01} - udf config -updown uuuu - udf config -cascadeType udfCascadeNone - udf config -step 1 - - packetGroup setDefault - packetGroup config -insertSequenceSignature true - packetGroup config -sequenceNumberOffset 38 - packetGroup config -signatureOffset 42 - packetGroup config -signature "08 71 18 05" - packetGroup config -groupIdOffset 52 - packetGroup config -groupId $streamId - packetGroup config -allocateUdf true - if {[packetGroup setTx $::chassis $::card $::port1 $streamId]} { - errorMsg "Error calling packetGroup setTx $::chassis $::card $::port1 $streamId" - } - } - } elseif {$proto == "udp"} { - udp setDefault - udp config -sourcePort $srcPort - udp config -destPort $dstPort - set packetSize [dict get $trafficSpec_l3 packetsize] - stream config -framesize $packetSize - if {[udp set $::chassis $::card $::port1]} { - errorMsg "Error setting udp on port $::chassis.$::card.$::port1" - } - errorMsg "frameSize: $frameSize, packetSize: $packetSize, srcMac: $srcMac, dstMac: $dstMac, srcPort: $srcPort, dstPort: $dstPort" - if {[info exists protocolPad]} { - errorMsg "protocolPad: $protocolPad, protocolPadBytes: $protocolPadBytes" - } - } - - if {[stream set $::chassis $::card $::port1 $streamId]} { - errorMsg "Error calling stream set $::chassis $::card $::port1 $streamId" - } - - incr streamId - streamRegion generateWarningList $::chassis $::card $::port1 - ixWriteConfigToHardware portList -noProtocolServer - - if {[packetGroup getRx $::chassis $::card $::port2]} { - errorMsg "Error calling packetGroup getRx $::chassis $::card $::port2" - } - - ################################################## - ######### Traffic Transmit and Results ########### - ################################################## - - # Transmit traffic - - logMsg "Clearing stats for all ports" - ixClearStats portList - - logMsg "Starting packet groups on port $::port2" - ixStartPortPacketGroups $::chassis $::card $::port2 - - logMsg "Starting Capture on port $::port2" - ixStartPortCapture $::chassis $::card $::port2 - - logMsg "Starting transmit on port $::port1" - ixStartPortTransmit $::chassis $::card $::port1 - - # If duration=0 is passed, exit after starting transmit - - if {$duration == 0} { - logMsg "Sending traffic until interrupted" - return - } - - logMsg "Waiting for $duration ms" - - # Wait for duration - 1 second to get traffic rate - - after [expr "$duration - 1"] - - # Get result - - set result [stopTraffic] - - if {$streamType == "contPacket"} { - return $result - } elseif {$streamType == "stopStream"} { - set payError 0 - set seqError 0 - set captureLimit 3000 - - # explode results from 'stopTraffic' for ease of use later - set framesSent [lindex $result 0] - set framesRecv [lindex $result 1] - set bytesSent [lindex $result 2] - set bytesRecv [lindex $result 3] - - if {$framesSent <= $captureLimit} { - captureBuffer get $::chassis $::card $::port2 1 $framesSent - set capturedFrames [captureBuffer cget -numFrames] - - set notCaptured [expr "$framesRecv - $capturedFrames"] - if {$notCaptured != 0} { - errorMsg "'$notCaptured' frames were not captured" - } - - if {$proto == "tcp"} { - for {set z 1} {$z <= $capturedFrames} {incr z} { - captureBuffer getframe $z - set capFrame [captureBuffer cget -frame] - regsub -all " " $capFrame "" frameNoSpaces - set frameNoSpaces - - set startPayload 108 - set endPayload [expr "[expr "$frameSize * 2"] - 9"] - set payload [string range $frameNoSpaces $startPayload $endPayload] - - if {$vlanEnabled != 1} { - set startSequence 76 - set endSequence 83 - set sequence [string range $frameNoSpaces $startSequence $endSequence] - scan $sequence %x seqDecimal - set seqDecimal - if {"$payload" != $::payloadLookup($frameSize)} { - errorMsg "frame '$z' payload: invalid payload" - incr payError - } - # variable z increments from 1 to total number of packets - # captured TCP sequence numbers start at 0, not 1. When - # comparing sequence numbers for captured frames, reduce - # variable z by 1 i.e. frame 1 with sequence 0 is compared - # to expected sequence 0. - if {$seqDecimal != $z-1} { - errorMsg "frame '$z' sequence number: Found '$seqDecimal'. Expected '$z'" - incr seqError - } - } - } - } - logMsg "Sequence Errors: $seqError" - logMsg "Payload Errors: $payError\n" - } else { - errorMsg "Too many packets for capture." - } - - set result [list $framesSent $framesRecv $bytesSent $bytesRecv $payError $seqError] - return $result - } else { - errorMsg "streamtype is not supported: '$streamType'" - } -} - -proc stopTraffic {} { - # Stop sending traffic from IXIA. - # - # Stops Transmit of traffic from Rx port. - # - # Returns: - # Output from Rx end of Ixia. - - ################################################## - ################# Initialisation ################# - ################################################## - - # Configure global variables. See documentation on 'global' for more - # information on why this is necessary - # https://www.tcl.tk/man/tcl8.5/tutorial/Tcl13.html - global portList - - ################################################## - ####### Stop Traffic Transmit and Results ######## - ################################################## - - # Read frame rate of transmission - - if {[stat getRate statAllStats $::chassis $::card $::port1]} { - errorMsg "Error reading stat rate on port $::chassis $::card $::port1" - return $::TCL_ERROR - } - - set sendRate [stat cget -framesSent] - set sendRateBytes [stat cget -bytesSent] - - if {[stat getRate statAllStats $::chassis $::card $::port2]} { - errorMsg "Error reading stat rate on port $::chassis $::card $::port2" - return $::TCL_ERROR - } - - set recvRate [stat cget -framesReceived] - set recvRateBytes [stat cget -bytesReceived] - - # Wait for a second, else we get funny framerate statistics - after 1 - - # Stop transmission of traffic - ixStopTransmit portList - - if {[ixCheckTransmitDone portList] == $::TCL_ERROR} { - return -code error - } else { - logMsg "Transmission is complete.\n" - } - - ixStopPacketGroups portList - ixStopCapture portList - - # Get statistics - - if {[stat get statAllStats $::chassis $::card $::port1]} { - errorMsg "Error reading stat on port $::chassis $::card $::port1" - return $::TCL_ERROR - } - - set bytesSent [stat cget -bytesSent] - set framesSent [stat cget -framesSent] - - if {[stat get statAllStats $::chassis $::card $::port2]} { - errorMsg "Error reading stat on port $::chassis $::card $::port2" - return $::TCL_ERROR - } - - set bytesRecv [stat cget -bytesReceived] - set framesRecv [stat cget -framesReceived] - - set bytesDropped [expr "$bytesSent - $bytesRecv"] - set framesDropped [expr "$framesSent - $framesRecv"] - - logMsg "Frames Sent: $framesSent" - logMsg "Frames Recv: $framesRecv" - logMsg "Frames Dropped: $framesDropped\n" - - logMsg "Bytes Sent: $bytesSent" - logMsg "Bytes Recv: $bytesRecv" - logMsg "Bytes Dropped: $bytesDropped\n" - - logMsg "Frame Rate Sent: $sendRate" - logMsg "Frame Rate Recv: $recvRate\n" - - set result [list $framesSent $framesRecv $bytesSent $bytesRecv $sendRate $recvRate $sendRateBytes $recvRateBytes] - - return $result -} - -proc rfcThroughputTest { testSpec trafficSpec } { - # Execute RFC tests from IXIA. - # - # Wraps the sendTraffic proc, repeatedly calling it, storing the result and - # performing an iterative binary search to find the highest possible RFC - # transmission rate. Abides by the specification of RFC2544 as given by the - # IETF: - # - # https://www.ietf.org/rfc/rfc2544.txt - # - # Parameters: - # testSpec - a dict detailing how the test should be run. Should be - # of format: - # {numtrials, duration, lossrate} - # trafficSpec - a dict describing the packet to be sent. Should be - # of format: - # { l2, l3} - # where each item is in turn a dict detailing the configuration of each - # layer of the packet - # Returns: - # Highest rate with acceptable packet loss. - - ################################################## - ################# Initialisation ################# - ################################################## - - # Configure global variables. See documentation on 'global' for more - # information on why this is necessary - # https://www.tcl.tk/man/tcl8.5/tutorial/Tcl13.html - global portList - - # Extract the provided dictionaries to local variables to simplify the - # rest of the script - - # testSpec - - # RFC2544 to IXIA terminology mapping (it affects Ixia configuration below): - # Test => Trial - # Trial => Iteration - set numTrials [dict get $testSpec tests] ;# we don't use this yet - set duration [dict get $testSpec duration] - set lossRate [dict get $testSpec lossrate] - set multipleStream [dict get $testSpec multipleStreams] ;# we don't use this yet - - # variables used for binary search of results - set min 1 - set max 100 - set diff [expr "$max - $min"] - - set result [list 0 0 0 0 0 0 0 0] ;# best result found so far - set percentRate 100 ;# starting throughput percentage rate - - ################################################## - ######### Traffic Transmit and Results ########### - ################################################## - - # iterate a maximum of 20 times, sending packets at a set rate to - # find fastest possible rate with acceptable packetloss - # - # As a reminder, the binary search works something like this: - # - # percentRate < idealValue --> min = percentRate - # percentRate > idealValue --> max = percentRate - # percentRate = idealValue --> max = min = percentRate - # - for {set i 0} {$i < 20} {incr i} { - dict set flowSpec type "contPacket" - dict set flowSpec numpkts 100 ;# this can be bypassed - dict set flowSpec duration $duration - dict set flowSpec framerate $percentRate - - set flowStats [sendTraffic $flowSpec $trafficSpec] - - # explode results from 'sendTraffic' for ease of use later - set framesSent [lindex $flowStats 0] - set framesRecv [lindex $flowStats 1] - set sendRate [lindex $flowStats 4] - - set framesDropped [expr "$framesSent - $framesRecv"] - if {$framesSent > 0} { - set framesDroppedRate [expr "double($framesDropped) / $framesSent"] - } else { - set framesDroppedRate 100 - } - - # check if we've already found the rate before 10 iterations, i.e. - # 'percentRate = idealValue'. This is as accurate as we can get with - # integer values. - if {[expr "$max - $min"] <= 0.5 } { - break - } - - # handle 'percentRate <= idealValue' case - if {$framesDroppedRate <= $lossRate} { - logMsg "Frame sendRate of '$sendRate' pps succeeded ('$framesDropped' frames dropped)" - - set result $flowStats - set min $percentRate - - set percentRate [expr "$percentRate + ([expr "$max - $min"] * 0.5)"] - # handle the 'percentRate > idealValue' case - } else { - if {$framesDropped == $framesSent} { - errorMsg "Dropped all frames!" - } - - errorMsg "Frame sendRate of '$sendRate' pps failed ('$framesDropped' frames dropped)" - - set max $percentRate - set percentRate [expr "$percentRate - ([expr "$max - $min"] * 0.5)"] - } - } - - set bestRate [lindex $result 4] - - logMsg "$lossRate% packet loss rate: $bestRate" - - return $result -} |