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2026-09-07 - 01:49

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 Mon Sep 07, 2026 00:44:14)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
238342930,2sleep0201rcuc/000:04:270
205372880,3sleep00-21swapper/022:29:240
205372880,3sleep00-21swapper/022:29:240
242412870,2chrt24242-21idleruntime-cro21:14:100
242412870,2chrt24242-21idleruntime-cro21:14:100
33442760,2sleep03343-21needreboot23:09:280
148692750,2sleep20-21swapper/222:14:262
76232660,2sleep20-21swapper/223:19:352
76232660,2sleep20-21swapper/223:19:352
210532650,2chrt0-21swapper/321:04:243
221522610,2chrt22151-21/usr/sbin/munin19:39:310
221522610,2chrt22151-21/usr/sbin/munin19:39:310
194842610,2sleep019513-21strings20:59:280
194842610,2sleep019513-21strings20:59:280
211942590,3sleep00-21swapper/021:04:250
148272580,1chrt13979-21/usr/sbin/munin23:39:310
148272580,1chrt13979-21/usr/sbin/munin23:39:310
148272580,1chrt13979-21/usr/sbin/munin23:39:310
176562560,3sleep017649-21gzip20:54:280
206862510,3sleep3431rcuc/321:04:163
206862510,3sleep3431rcuc/321:04:163
39202500,3sleep30-21swapper/320:19:223
320622490,2sleep00-21swapper/021:34:240
234682490,3chrt201rcuc/019:44:250
234682490,3chrt201rcuc/019:44:250
1220999482,21cyclictest233412/usr/sbin/munin00:04:331
8002470,4chrt0-21swapper/320:09:293
8002470,4chrt0-21swapper/320:09:293
40572470,3sleep30-21swapper/321:44:323
31372460,3sleep20-21swapper/200:34:322
125902460,3chrt0-21swapper/223:34:262
125902460,3chrt0-21swapper/223:34:262
288092450,3sleep30-21swapper/322:49:333
288092450,3sleep30-21swapper/322:49:333
15502450,2sleep11734-21grep21:39:251
15502450,2sleep11734-21grep21:39:251
15502450,2sleep11734-21grep21:39:251
258212400,2sleep125924-21systemctl19:49:301
320142390,4sleep30-21swapper/322:59:263
320142390,4sleep30-21swapper/322:59:263
1221099391,30cyclictest23249-21chrt00:04:172
1221099391,30cyclictest23249-21chrt00:04:172
1221099391,30cyclictest23249-21chrt00:04:172
158082380,2sleep30-21swapper/320:49:293
158082380,2sleep30-21swapper/320:49:293
12209993832,4cyclictest18095-21sendmail22:24:111
12209993832,4cyclictest18095-21sendmail22:24:111
276252370,3chrt0-21swapper/219:54:282
138922370,3sleep30-21swapper/320:44:263
138922370,3sleep30-21swapper/320:44:263
39452350,3sleep00-21swapper/021:44:290
12209993527,6cyclictest4683-21netstat00:39:291
12209993527,6cyclictest4683-21netstat00:39:291
12209993527,6cyclictest4683-21netstat00:39:291
240112340,3sleep30-21swapper/321:11:203
240112340,3sleep30-21swapper/321:11:203
287452330,2sleep30-21swapper/319:59:163
12209993327,4cyclictest9688-21fschecks_time20:34:231
12208993327,4cyclictest19979-21latency_hist22:29:110
12208993327,4cyclictest19979-21latency_hist22:29:110
12208993327,4cyclictest19362-21latency_hist23:54:110
12208993327,3cyclictest0-21swapper/000:04:170
12208993327,3cyclictest0-21swapper/000:04:170
12208993327,3cyclictest0-21swapper/000:04:170
12208993326,5cyclictest4991-21threads00:39:330
12208993326,5cyclictest4991-21threads00:39:330
12208993326,5cyclictest4991-21threads00:39:330
9122320,2sleep032680-21/usr/sbin/munin00:29:290
9122320,2sleep032680-21/usr/sbin/munin00:29:290
162952320,12sleep0171ktimers/020:49:340
162952320,12sleep0171ktimers/020:49:340
12209993226,4cyclictest5485-21latency_hist20:24:101
12208993225,5cyclictest2094-21netstat21:39:290
12208993225,5cyclictest2094-21netstat21:39:290
12208993225,5cyclictest2094-21netstat21:39:290
12208993127,3cyclictest6817-21latency_hist21:54:100
12208993127,3cyclictest6817-21latency_hist21:54:100
12208993123,6cyclictest31154-21latency_hist22:59:100
70322300,2sleep30-21swapper/323:19:283
70322300,2sleep30-21swapper/323:19:283
12209993025,3cyclictest2156-21fschecks_time20:14:231
12209993025,3cyclictest2156-21fschecks_time20:14:231
12209993024,4cyclictest20506-21gltestperf22:29:241
12209993024,4cyclictest20506-21gltestperf22:29:241
12209993023,5cyclictest29595-21sshd21:25:421
12209993021,7cyclictest1037-21fschecks_time23:04:251
12209993021,7cyclictest1037-21fschecks_time23:04:251
12208993025,3cyclictest12452-21latency_hist22:09:100
12208993025,3cyclictest12452-21latency_hist22:09:100
165172290,4chrt0-21swapper/223:44:272
165172290,4chrt0-21swapper/223:44:272
12209992924,4cyclictest4923-21idleruntime-cro21:49:101
12209992924,4cyclictest17889-21fschecks_count23:49:221
12209992924,3cyclictest19515-21needreboot20:59:271
12209992924,3cyclictest19515-21needreboot20:59:271
12209992923,4cyclictest6082-21gltestperf20:24:261
12209992923,4cyclictest6082-21gltestperf20:24:261
12209992923,4cyclictest32232-21sendmail_mailqu22:59:301
12209992923,4cyclictest32232-21sendmail_mailqu22:59:301
12209992923,4cyclictest31118-21gltestperf00:24:241
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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