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2025-12-22 - 09:01

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, slot #3

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.
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 100 highest latencies:
System rack5slot3s.osadl.org (updated Mon Dec 22, 2025 00:44:28)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
251332231164,54sleep10-21swapper/119:09:591
251332231164,54sleep10-21swapper/119:09:591
250502202165,25sleep30-21swapper/319:08:573
250502202165,25sleep30-21swapper/319:08:563
231752201165,25sleep20-21swapper/219:05:092
231752201165,25sleep20-21swapper/219:05:092
250222200162,26sleep00-21swapper/019:08:340
250222200162,26sleep00-21swapper/019:08:340
3064621800,4sleep22522699cyclictest21:45:222
176742660,5sleep32523299cyclictest21:15:253
37432470,3sleep03747-21unixbench_singl23:10:280
187912460,1sleep20-21swapper/220:05:172
14582460,1sleep10-21swapper/119:25:231
2523299393,9cyclictest0-21swapper/319:11:303
2523299370,29cyclictest0-21swapper/323:54:373
2522699371,9cyclictest32736-21kworker/2:123:41:132
319852360,5sleep32523299cyclictest20:35:203
2523299361,7cyclictest2546-21/usr/sbin/munin19:30:133
2523299356,3cyclictest5354-21users22:00:263
2523299352,11cyclictest15372-21/usr/sbin/munin23:40:253
2523299351,6cyclictest0-21swapper/321:05:143
25232993512,3cyclictest25881-21if_enp1s021:35:213
2523299351,21cyclictest835-21runrttasks23:37:273
2522699351,6cyclictest14242-21ntp_states23:35:232
2521599358,12cyclictest2943-21awk20:45:010
2523299349,8cyclictest23945-21awk00:00:003
2523299341,10cyclictest0-21swapper/322:33:363
2522699342,12cyclictest32736-21kworker/2:121:28:332
2522699342,12cyclictest32736-21kworker/2:121:28:332
2522699341,4cyclictest20593-21kernelversion23:50:202
25226993410,3cyclictest27950-21/usr/sbin/munin22:55:252
2522699340,2cyclictest0-21swapper/220:25:162
2523299335,3cyclictest87250irq/129-enp1s0-20:00:143
2523299334,3cyclictest12050irq/123-ahci[0021:50:013
2523299332,3cyclictest30146-21/usr/sbin/munin23:00:243
2523299331,5cyclictest0-21swapper/321:44:223
2523299331,15cyclictest25368-21sshd22:48:103
25232993311,4cyclictest28457-21tr19:15:143
2522699339,4cyclictest25987-21/usr/sbin/munin21:35:212
2522699331,8cyclictest30974-21uname23:00:182
2522699331,4cyclictest14388-21taskset22:23:162
25226993312,3cyclictest19154-21/usr/sbin/munin22:35:262
25232993215,10cyclictest0-21swapper/323:15:103
2523299321,2cyclictest0-21swapper/321:20:223
25232993212,4cyclictest21442-21sshd20:10:283
2523299321,15cyclictest1920-21sed19:25:283
2523299321,10cyclictest0-21swapper/323:05:103
2523299321,10cyclictest0-21swapper/321:13:263
2522699329,4cyclictest13304-21/usr/sbin/munin19:55:012
2522699329,3cyclictest835-21runrttasks19:39:132
2522699329,3cyclictest30793-21/usr/sbin/munin00:15:222
2522699328,3cyclictest12237-21smart_sda23:30:232
2522699322,26cyclictest25012-21grep22:45:262
2522699321,4cyclictest0-21swapper/219:45:222
25226993211,3cyclictest26724-21df00:05:142
25226993210,3cyclictest31194-21hwlatdetect19:20:172
25226993210,3cyclictest13218-21swap21:05:262
2522299321,18cyclictest0-21swapper/120:19:581
2523299313,19cyclictest87050irq/127-enp1s0-21:57:433
2523299311,9cyclictest0-21swapper/322:38:063
2523299311,6cyclictest0-21swapper/322:40:333
2523299311,4cyclictest0-21swapper/323:21:133
2523299311,3cyclictest26404-21grep00:05:133
2523299311,10cyclictest0-21swapper/320:25:293
2523299311,10cyclictest0-21swapper/300:24:063
2523299310,9cyclictest0-21swapper/320:56:503
2522699319,3cyclictest2546-21/usr/sbin/munin19:30:252
2522699319,3cyclictest18312-21latency_hist21:20:012
2522699311,5cyclictest0-21swapper/221:53:192
25226993110,4cyclictest0-21swapper/223:10:122
25226993110,3cyclictest835-21runrttasks22:26:082
25226993110,3cyclictest11722-21latency_hist21:05:012
2522299311,3cyclictest0-21swapper/120:51:261
2522299311,10cyclictest0-21swapper/123:43:181
2523299307,3cyclictest0-21swapper/320:15:233
2523299301,4cyclictest1269-21df20:40:153
2523299300,10cyclictest0-21swapper/320:45:113
2522699308,3cyclictest24161-21/usr/sbin/munin00:00:262
2522699307,3cyclictest5497-21sort00:30:162
2522699301,6cyclictest0-21swapper/222:05:222
2522699301,14cyclictest0-21swapper/220:50:282
2522699301,10cyclictest5889-21grep22:05:022
2522699300,19cyclictest32736-21kworker/2:122:51:282
2522299301,12cyclictest87150irq/128-enp1s0-23:21:541
2523299291,10cyclictest0-21swapper/323:33:473
2523299290,2cyclictest13290-21if_enp1s022:20:183
2523299290,10cyclictest0-21swapper/321:52:423
2522699299,3cyclictest5119-21latency_hist20:50:022
2522699299,3cyclictest24359-21latency_hist20:20:012
2522699299,3cyclictest2389-21wc20:40:272
2522699298,3cyclictest28661-21diskstats19:15:162
2522699297,3cyclictest942-21df00:20:152
25226992911,3cyclictest22208-21cat20:15:012
25226992910,3cyclictest17339-21cut22:30:152
2522299291,14cyclictest0-21swapper/119:23:021
2522299291,13cyclictest0-21swapper/120:11:341
2522299291,11cyclictest0-21swapper/122:43:571
2522299291,10cyclictest0-21swapper/119:18:291
25215992910,16cyclictest4798-21munin-run00:30:010
25232992815,11cyclictest0-21swapper/322:05:043
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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