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2026-08-14 - 04:34

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #4, slot #1

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 here to display the system's profile data or here to proceed to next system.
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, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack4slot1s.osadl.org (updated Fri Aug 14, 2026 00:44:13)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
183062860,2sleep018309-21latency_hist21:13:530
183062860,2sleep018309-21latency_hist21:13:530
174962790,2chrt0-21swapper/119:44:011
180062690,1chrt171ktimers/000:04:060
272462670,3sleep127370-21mailstats20:09:071
228852570,2chrt22887-21head22:49:131
191682560,3chrt0-21swapper/122:39:121
191682560,3chrt0-21swapper/122:39:121
191682560,3chrt0-21swapper/122:39:121
6282995422,6cyclictest700-21192.168.115.40-manager00:11:551
6282995422,6cyclictest700-21192.168.115.40-manager00:11:551
219922500,3sleep20-21swapper/200:14:092
219922500,3sleep20-21swapper/200:14:092
316392460,3sleep20-21swapper/200:39:132
316392460,3sleep20-21swapper/200:39:132
6281994510,18cyclictest10404-21sshd20:50:080
6281994510,18cyclictest10404-21sshd20:50:080
102142440,3sleep20-21swapper/223:44:012
102142440,3sleep20-21swapper/223:44:012
314172430,3chrt0-21swapper/223:14:032
314172430,3chrt0-21swapper/223:14:032
65292420,3sleep06531-21grep20:39:120
6281994110,10cyclictest27241-21seq21:34:590
6281994012,10cyclictest4571-21latency_hist22:03:530
6281994012,10cyclictest4571-21latency_hist22:03:530
6281994012,10cyclictest4571-21latency_hist22:03:530
628199399,11cyclictest5632-21taskset23:31:170
6281993914,13cyclictest31817-21taskset00:41:040
6281993914,13cyclictest31817-21taskset00:41:040
6281993910,10cyclictest24312-21cut22:54:100
6281993910,10cyclictest24312-21cut22:54:100
110442390,3sleep111235-21tail20:54:011
628299389,12cyclictest1937-21taskset23:22:201
628299389,12cyclictest1937-21taskset23:22:201
628299388,11cyclictest24029-21taskset19:59:351
628299388,11cyclictest24029-21taskset19:59:351
6282993811,10cyclictest4159-21taskset23:28:561
628199389,10cyclictest28063-21chrt00:30:390
6281993812,10cyclictest31742-21taskset20:22:350
6281993812,10cyclictest31742-21taskset20:22:350
628299379,11cyclictest6710-21taskset20:41:071
628199379,11cyclictest3587-21chrt23:24:180
628199379,11cyclictest3587-21chrt23:24:180
628199378,11cyclictest2233-21seq21:54:170
6281993711,11cyclictest23565-21seq21:25:350
6281993711,11cyclictest22964-21chrt22:49:480
6281993711,10cyclictest4702-21runrttasks20:34:410
6281993710,9cyclictest13588-21chrt22:25:120
6281993710,11cyclictest31507-21seq21:48:580
6281993710,11cyclictest31507-21seq21:48:580
6281993710,10cyclictest22281-21sshd19:56:010
6281993710,10cyclictest22281-21sshd19:56:010
262992370,2sleep0171ktimers/022:59:100
262992370,2sleep0171ktimers/022:59:100
628299369,10cyclictest9258-21taskset23:39:361
628299369,10cyclictest9258-21taskset23:39:361
628299368,10cyclictest22386-21taskset19:57:231
628299368,10cyclictest22386-21taskset19:57:231
628299364,14cyclictest30104-21seq00:37:581
628299364,14cyclictest30104-21seq00:37:581
6282993630,4cyclictest1-21systemd00:43:481
6282993630,4cyclictest1-21systemd00:43:481
6282993612,16cyclictest32743-21unixbench_singl21:49:131
6282993612,16cyclictest32743-21unixbench_singl21:49:131
6282993610,10cyclictest22631-21taskset00:18:001
6282993610,10cyclictest22631-21taskset00:18:001
628199369,11cyclictest28671-21taskset23:06:080
628199369,11cyclictest11704-21seq22:20:180
628199369,11cyclictest11704-21seq22:20:180
628199369,10cyclictest21101-21taskset22:44:460
628199368,11cyclictest17379-21taskset22:35:050
628199368,11cyclictest17379-21taskset22:35:050
628199366,20cyclictest0-21swapper/020:27:170
628199366,20cyclictest0-21swapper/020:27:170
628199366,13cyclictest16758-21seq23:59:390
628199366,13cyclictest16758-21seq23:59:390
628199366,13cyclictest16758-21seq23:59:390
628199366,11cyclictest21593-21runrttasks21:19:320
628199366,11cyclictest21593-21runrttasks21:19:320
6281993629,5cyclictest9602-21latency_hist23:43:480
6281993629,5cyclictest9602-21latency_hist23:43:480
6281993612,10cyclictest18464-21taskset19:44:490
6281993611,9cyclictest30984-21chrt21:44:560
6281993611,9cyclictest30984-21chrt21:44:560
6281993611,6cyclictest19929-21seq21:17:060
6281993611,6cyclictest19929-21seq21:17:060
6281993611,11cyclictest3028-21taskset20:32:080
6281993611,10cyclictest7475-21chrt23:35:590
6281993611,10cyclictest6100-21chrt22:05:260
6281993611,10cyclictest16076-21seq21:05:370
6281993610,7cyclictest11436-21seq23:48:260
6281993610,7cyclictest11436-21seq23:48:260
6281993610,14cyclictest13178-21chrt23:51:510
6281993610,14cyclictest13178-21chrt23:51:510
6281993610,11cyclictest30095-21chrt00:37:500
6281993610,11cyclictest30095-21chrt00:37:500
6281993610,11cyclictest22820-21awk19:58:590
6281993610,11cyclictest22820-21awk19:58:590
6281993610,10cyclictest9960-21taskset22:16:480
6281993610,10cyclictest28324-21chrt20:13:550
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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