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2025-10-19 - 20:24

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, 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.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rackeslot6s.osadl.org (updated Sun Oct 19, 2025 12:44:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
221103699861,33cyclictest2263370-21/usr/sbin/munin12:15:211
221103699861,33cyclictest2263370-21/usr/sbin/munin12:15:211
2211036997134,8cyclictest0-21swapper/111:09:591
2211036996834,8cyclictest0-21swapper/111:00:311
221103699671,26cyclictest2235410-21/usr/sbin/munin09:30:221
2211033996453,2cyclictest0-21swapper/009:35:020
2211033996453,2cyclictest0-21swapper/009:35:020
2211036996227,10cyclictest0-21swapper/107:55:241
2211036996128,28cyclictest0-21swapper/109:10:311
2211036996027,9cyclictest0-21swapper/107:35:301
2211033996028,29cyclictest131ktimers/011:00:010
2211033995545,5cyclictest2261493-21munin-plugin-st12:05:000
2211033995446,5cyclictest2251274-21munin-plugin-st11:05:010
221103399542,26cyclictest2228034-21/usr/sbin/munin08:45:260
2211033995349,2cyclictest0-21swapper/011:10:020
2211033995349,2cyclictest0-21swapper/011:10:010
2211033995345,4cyclictest2258117-21munin-plugin-st11:45:010
2211037995244,5cyclictest2248731-21munin-plugin-st10:50:012
2211037995244,5cyclictest2248731-21munin-plugin-st10:50:012
2211036995244,4cyclictest2218063-21unixbench_singl07:45:291
2211036995244,4cyclictest2218063-21unixbench_singl07:45:291
221103399526,24cyclictest15-21rcuc/009:45:010
2211033995143,4cyclictest20750irq/251-8000000.ethernet08:00:290
2211037995042,4cyclictest2241972-21munin-plugin-st10:10:012
2211033995040,5cyclictest2244480-21head10:20:330
2211036994934,11cyclictest0-21swapper/112:25:281
2211033994924,21cyclictest20750irq/251-8000000.ethernet10:15:120
2211037994836,7cyclictest2212904-21unixbench_singl07:15:292
2211037994831,11cyclictest0-21swapper/207:40:222
2211033994811,31cyclictest0-21swapper/008:20:300
2211037994734,9cyclictest0-21swapper/208:35:232
2211037994720,11cyclictest2220872-21/usr/sbin/munin08:05:192
2211036994733,9cyclictest0-21swapper/110:20:321
2211033994717,15cyclictest131ktimers/011:50:160
2211037994623,14cyclictest0-21swapper/209:50:302
2211037994623,14cyclictest0-21swapper/209:50:302
2211033994640,4cyclictest0-21swapper/007:20:130
2211033994635,5cyclictest0-21swapper/011:45:260
221103399461,39cyclictest0-21swapper/010:10:170
2211036994537,4cyclictest168350irq/127-8000000.ethernet-tx107:10:321
2211036994530,9cyclictest0-21swapper/109:45:281
2211036994527,13cyclictest1656-21lldpd08:35:171
2211033994537,5cyclictest2223288-21sendmail08:20:010
2211033994537,5cyclictest2223288-21sendmail08:20:010
2211033994532,8cyclictest0-21swapper/009:05:000
2211033994530,10cyclictest0-21swapper/011:55:290
2211033994527,14cyclictest131ktimers/012:20:130
2211037994429,10cyclictest0-21swapper/208:25:302
221103399446,35cyclictest0-21swapper/010:50:230
2211033994433,8cyclictest2222253-21grep08:10:300
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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