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2024-07-27 - 14:19

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #b, slot #6

Rack #0/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #1/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #2/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #3/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #4/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #5/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #6/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #7/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #8/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #9/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #a/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #b/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #c/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #d/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #e/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #f/#0 #1 #2 #3 #4 #5 #6 #7 #8 
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Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rackbslot6s.osadl.org (updated Sat Jul 27, 2024 00:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
32725911220,8ptp4l2003-21kworker/1:100:47:301
220022950,9sleep0424199cyclictest04:02:430
184032870,7sleep0424199cyclictest03:18:580
3272591840,1ptp4l241ktimersoftd/105:54:281
424199790,8cyclictest9503-21ssh04:25:370
424199790,8cyclictest6539-21ssh04:23:010
424199780,8cyclictest629-21ssh05:31:540
424199780,8cyclictest25180-21ssh06:01:020
424199750,7cyclictest4709-21/usr/sbin/munin04:58:380
424199750,6cyclictest23778-21diskmemload05:05:060
424199730,8cyclictest550-21hddtemp_smartct02:58:360
424199730,7cyclictest18996-21ssh05:14:060
3272591730,1ptp4l241ktimersoftd/103:21:251
424199720,6cyclictest29707-21seq06:07:140
424199720,6cyclictest28623-21ssh05:26:260
424199710,6cyclictest540-21runrttasks06:10:190
424199710,6cyclictest13046-21runrttasks01:05:380
424199700,6cyclictest27811-21seq04:47:410
424199690,4cyclictest23778-21diskmemload05:55:340
424699646,16cyclictest7213-21snmp_o5powerctl05:38:511
424199641,43cyclictest3590-21ssh04:57:180
39312644,10sleep00-21swapper/000:45:350
424199635,47cyclictest13109-21apt-get05:08:320
424199633,49cyclictest5952-21apt-get05:38:330
424199632,7cyclictest3474-21ssh03:39:460
424199624,48cyclictest30650-21apt-get01:48:290
424199620,6cyclictest5622-21bc03:43:320
424699618,14cyclictest28455-21apt-get04:48:321
4241996120,36cyclictest21807-21ps03:23:400
424199611,7cyclictest28831-21ssh03:32:270
424199611,47cyclictest13257-21taskset05:46:580
424199610,7cyclictest23778-21diskmemload03:08:240
424699603,17cyclictest3837-21ssh06:14:071
4246995910,17cyclictest1078-21ssh06:11:281
424199595,43cyclictest1720-21apt-get05:33:330
424199592,9cyclictest31800-21snmpd01:43:230
424699584,17cyclictest29439-21awk01:43:421
424699583,17cyclictest862-21ssh04:15:131
424199586,42cyclictest7118-21apt-get02:08:300
424199580,6cyclictest31257-21ssh04:51:130
424199580,6cyclictest12508-21snmp_o5powerctl02:18:510
424699574,16cyclictest12969-21df_inode03:13:341
424699572,16cyclictest15106-21apt-get04:33:201
424199575,42cyclictest9818-21apt-get03:48:280
424199575,42cyclictest9818-21apt-get03:48:280
424199573,43cyclictest17672-21apt-get02:33:310
424199572,7cyclictest23140-21snmp_o5powerctl01:28:510
424199570,8cyclictest32687-21ssh03:36:440
424199570,8cyclictest27461-21ssh02:52:160
424199570,7cyclictest5845-21unixbench_multi00:48:540
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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