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2025-11-27 - 11:59

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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Click on a legend element to toggle display of that core, ctrl-click inverts display, shift-click enables all.

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 100 highest latencies:
System rackeslot6s.osadl.org (updated Thu Nov 27, 2025 00:44:43)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2197390997928,36cyclictest0-21swapper/219:55:012
219738499711,23cyclictest21050irq/252-8000000.ethernet19:15:010
2197390996324,33cyclictest2251443-21/usr/sbin/munin00:30:192
2197390996319,19cyclictest2231919-21/usr/sbin/munin22:35:202
219739099622,38cyclictest0-21swapper/219:55:012
2197384996128,25cyclictest0-21swapper/023:15:110
219739099600,26cyclictest0-21swapper/220:20:022
219739099594,18cyclictest2248059-21/usr/sbin/munin00:10:182
219739099589,25cyclictest0-21swapper/222:15:012
219739099585,30cyclictest2219926-21/usr/sbin/munin21:25:172
219738699584,6cyclictest2238461-21kworker/u8:3+events_power_efficient23:35:011
2197390995732,15cyclictest2199694-21apt-get19:20:192
2197390995512,18cyclictest2198290-21munin-node22:30:012
2197390995510,19cyclictest0-21swapper/222:55:022
2197386995543,8cyclictest2223108-21munin-plugin-st21:45:001
2197390995437,11cyclictest0-21swapper/219:15:022
219739099538,13cyclictest2211708-21apt-get20:35:012
219739099538,13cyclictest2211708-21apt-get20:35:012
2197390995232,14cyclictest0-21swapper/200:00:122
2197390995129,12cyclictest0-21swapper/220:50:242
2197390995124,15cyclictest0-21swapper/223:25:142
2197390995123,15cyclictest0-21swapper/219:25:132
2197390995037,7cyclictest2245278-21grep23:50:322
2197390995034,11cyclictest2221608-21apt-get21:35:142
2197390995032,13cyclictest2247221-21apt-get00:05:152
219739099501,36cyclictest0-21swapper/221:50:002
2197390994933,11cyclictest2215621-21apt-get21:00:162
2197390994925,14cyclictest0-21swapper/222:30:152
2197384994930,12cyclictest131ktimers/021:40:120
2197384994922,21cyclictest21050irq/252-8000000.ethernet20:05:240
2197390994824,11cyclictest0-21swapper/219:35:122
2197390994820,15cyclictest0-21swapper/223:15:132
219739099481,24cyclictest0-21swapper/200:25:002
2197390994729,12cyclictest0-21swapper/223:45:122
2197390994727,11cyclictest2225588-21grep21:55:282
2197390994722,14cyclictest0-21swapper/223:00:142
219738699471,23cyclictest0-21swapper/119:15:011
2197384994735,8cyclictest2229008-21munin-plugin-st22:20:000
2197384994734,9cyclictest0-21swapper/021:25:280
2197390994624,11cyclictest0-21swapper/223:30:142
2197390994535,6cyclictest2226393-21grep22:00:302
2197390994529,12cyclictest2236998-21apt-get23:05:142
2197390994528,9cyclictest2212244-21apt-get20:40:112
2197390994526,12cyclictest2218877-21sendmail21:19:592
2197390994526,10cyclictest2233385-21unixbench_singl22:40:272
2197390994525,10cyclictest0-21swapper/220:20:272
2197386994533,7cyclictest0-21swapper/119:55:301
2197386994531,9cyclictest0-21swapper/121:35:181
2197386994531,9cyclictest0-21swapper/119:10:011
2197384994539,3cyclictest12-21ksoftirqd/019:25:100
2197384994536,5cyclictest2221299-21grep21:30:280
219738499452,37cyclictest0-21swapper/000:25:130
2197390994436,4cyclictest2201370-21apt-get19:30:122
2197390994432,9cyclictest2252276-21sshd00:35:082
2197390994432,7cyclictest2251208-21grep00:25:292
2197390994430,5cyclictest2219085-21/usr/sbin/munin21:20:282
2197390994423,11cyclictest0-21swapper/221:50:142
2197390994421,13cyclictest2207925-21grep20:05:292
2197390994419,16cyclictest2229752-21unixbench_multi22:20:272
2197386994431,9cyclictest0-21swapper/121:25:281
2197386994429,9cyclictest0-21swapper/122:55:291
2197384994433,6cyclictest24150irq/422-mmc120:14:590
2197384994432,8cyclictest0-21swapper/021:15:000
2197390994330,9cyclictest2214762-21apt-get20:55:152
2197390994329,8cyclictest0-21swapper/223:35:192
2197390994327,10cyclictest2235063-21grep22:50:302
2197390994325,12cyclictest0-21swapper/223:40:132
2197390994321,18cyclictest0-21swapper/220:15:012
2197390994321,14cyclictest2228843-21/usr/sbin/munin22:15:262
2197386994332,7cyclictest0-21swapper/100:05:281
2197386994316,15cyclictest2215417-21basename21:00:001
2197390994232,5cyclictest0-21swapper/223:55:282
2197390994227,9cyclictest0-21swapper/219:45:112
2197390994224,11cyclictest0-21swapper/223:20:192
2197390994219,17cyclictest2238589-21latency_hist23:15:002
2197386994234,5cyclictest22-21rcuc/121:15:011
2197386994232,6cyclictest2214562-21munin-plugin-st20:55:001
2197386994229,9cyclictest0-21swapper/100:00:291
2197386994225,12cyclictest0-21swapper/123:55:281
2197386994222,12cyclictest0-21swapper/122:10:291
2197386994222,11cyclictest0-21swapper/120:45:281
2197384994230,7cyclictest0-21swapper/000:20:290
2197390994134,3cyclictest2216460-21apt-get21:05:132
2197390994123,12cyclictest2199614-21grep19:20:022
2197390994123,12cyclictest2199614-21grep19:20:022
2197390994114,20cyclictest2197495-21latency_hist19:10:012
2197386994129,6cyclictest0-21swapper/123:10:281
2197386994128,8cyclictest0-21swapper/123:15:201
2197386994127,9cyclictest2241049-21grep23:25:301
2197386994127,8cyclictest0-21swapper/120:20:271
2197386994125,9cyclictest0-21swapper/123:45:281
2197386994124,10cyclictest0-21swapper/119:35:301
2197386994123,10cyclictest0-21swapper/123:50:321
2197384994132,5cyclictest2235041-21grep22:50:290
219738499412,11cyclictest2238647-21latency_hist23:15:020
2197384994120,17cyclictest0-21swapper/021:00:270
219738499411,38cyclictest0-21swapper/019:40:210
2197384994113,26cyclictest2239963-21phc2sys-jitter23:20:250
2197390994034,3cyclictest2226683-21apt-get22:05:152
2197390994031,4cyclictest2220770-21apt-get21:30:142
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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