You are here: Home / Projects / OSADL QA Farm Real-time / Latency plots / 
2025-11-20 - 03:19

OSADL QA Farm on Real-time of Mainline Linux

About - Hardware - CPUs - Benchmarks - Graphics - Benchmarks - Kernels - Boards/Distros - Latency monitoring - Latency plots - System data - Profiles - Compare - Awards

Default latency plot of shadow in rack #3, 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 
Special  All - All RT - Optimization - Ethernet - Thumbnails - Next
  TQ-Systems
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 50 highest latencies:
System rack3slot3s.osadl.org (updated Thu Nov 20, 2025 00:43:58)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
347330523160,2sleep23473304-21ssh21:15:102
3373377212855,68sleep30-21swapper/319:07:203
374175821220,2sleep00-21swapper/000:00:020
337339528755,10sleep10-21swapper/119:07:341
337354427555,14sleep00-21swapper/019:09:320
337350627558,10sleep20-21swapper/219:09:032
3373714993830,3cyclictest3464785-21sleep21:10:013
3373714993320,9cyclictest3529418-21turbostat21:50:013
3373714992622,2cyclictest0-21swapper/320:55:003
337371499262,16cyclictest3678780-21taskset23:20:163
3373714992521,2cyclictest0-21swapper/300:20:163
35705562241,16sleep13570677-21irqstats22:15:161
337371499242,14cyclictest3749619-21taskset00:04:503
37569902231,15sleep03757005-21sshd00:08:320
337371499239,10cyclictest0-21swapper/321:20:153
3373714992317,4cyclictest36091762chrt22:38:343
337371499231,17cyclictest3789000-21sleep00:30:003
337371499231,17cyclictest3789000-21sleep00:29:593
337371499228,10cyclictest3478508-21taskset21:15:593
337371499226,10cyclictest3416699-21chrt20:20:403
3373714992219,2cyclictest0-21swapper/322:30:003
337371499221,15cyclictest3671541-21chrt23:15:183
337371499221,15cyclictest3632863-21taskset22:51:563
35030792210,8sleep244-21ksoftirqd/221:31:272
337371499212,13cyclictest3558064-21taskset22:05:193
3373714992119,1cyclictest0-21swapper/323:00:013
3373714992118,2cyclictest0-21swapper/300:10:173
337371499211,16cyclictest3504777-21chrt21:34:073
337371499211,15cyclictest3698375-21chrt23:32:143
337371499211,15cyclictest3505616-21chrt21:35:033
35930382201,7sleep13464771-21diskmemload22:28:341
33815522200,1sleep20-21swapper/219:51:382
337371499208,8cyclictest3584214-21taskset22:22:263
337371499205,11cyclictest3740883-21taskset23:59:033
337371499202,13cyclictest3730684-21taskset23:51:033
337371499202,13cyclictest3529761-21taskset21:50:113
337371499202,12cyclictest3707158-21taskset23:38:073
3373714992017,2cyclictest0-21swapper/300:35:173
3373714992017,1cyclictest0-21swapper/320:50:003
3373714992016,2cyclictest0-21swapper/323:11:373
3373714992016,2cyclictest0-21swapper/322:30:123
3373714992016,2cyclictest0-21swapper/321:40:163
3373714992016,2cyclictest0-21swapper/321:40:153
3373714992016,2cyclictest0-21swapper/300:19:593
3373714992012,4cyclictest37224322sleep323:45:573
3373714992012,4cyclictest0-21swapper/322:40:243
337371499201,14cyclictest3562495-21chrt22:10:113
37487242191,3sleep00-21swapper/000:03:260
35297922191,5sleep03529904-21sh21:50:130
34160152191,11sleep03416061-21ntpq20:20:230
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

Valid XHTML 1.0 Transitional