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2026-01-07 - 00:05

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 Tue Jan 06, 2026 12:44:12)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
168022810,4sleep20-21swapper/207:30:352
168022810,4sleep20-21swapper/207:30:352
252492750,3chrt25233-21timerandwakeup12:10:460
249062650,2sleep025025-21tune2fs10:45:360
249062650,2sleep025025-21tune2fs10:45:360
323882640,4sleep20-21swapper/212:30:422
323882640,4sleep20-21swapper/212:30:422
9472580,3sleep00-21swapper/009:40:390
9472580,3sleep00-21swapper/009:40:390
128522580,2chrt12851-21latency08:45:401
307352570,3sleep30-21swapper/311:00:383
307352570,3sleep30-21swapper/311:00:383
188022570,2sleep20-21swapper/207:35:372
188022570,2sleep20-21swapper/207:35:372
229992540,3chrt0-21swapper/212:05:422
229992540,3chrt0-21swapper/212:05:422
92672530,3chrt9270-21grep08:35:420
92672530,3chrt9270-21grep08:35:420
59872500,2sleep20-21swapper/211:20:392
59872500,2sleep20-21swapper/211:20:392
281852480,3sleep20-21swapper/212:20:372
281852480,3sleep20-21swapper/212:20:372
281852480,3sleep20-21swapper/212:20:372
99442440,3sleep09252-21cyclictest11:30:420
99442440,3sleep09252-21cyclictest11:30:420
75222440,2sleep17528-21processes08:30:441
75222440,2sleep17528-21processes08:30:441
200182440,12sleep1271rcuc/110:30:451
200182440,12sleep1271rcuc/110:30:451
193602440,3sleep20-21swapper/209:03:032
193602440,3sleep20-21swapper/209:03:032
44242420,3chrt2045-21kworker/0:2+events09:50:360
44242420,3chrt2045-21kworker/0:2+events09:50:360
187882420,2sleep00-21swapper/011:55:400
187882420,2sleep00-21swapper/011:55:400
187882420,2sleep00-21swapper/011:55:400
161282410,3sleep20-21swapper/210:20:412
161282410,3sleep20-21swapper/210:20:412
54792390,3sleep20-21swapper/209:50:462
54792390,3sleep20-21swapper/209:50:462
9255993631,4cyclictest9252-21cyclictest12:00:441
9255993631,4cyclictest9252-21cyclictest12:00:441
260282360,3chrt0-21swapper/310:45:463
260282360,3chrt0-21swapper/310:45:463
9255993528,6cyclictest7742-21sendmail10:00:251
9255993528,6cyclictest7742-21sendmail10:00:251
9255993427,5cyclictest26312-21fschecks_time12:15:361
9255993427,5cyclictest26312-21fschecks_time12:15:361
9255993427,5cyclictest26312-21fschecks_time12:15:361
9254993426,6cyclictest27045-21latency_hist09:25:240
9254993426,6cyclictest27045-21latency_hist09:25:240
9255993325,6cyclictest525-21rsyslogd11:45:281
9255993325,6cyclictest525-21rsyslogd11:45:281
9254993329,3cyclictest9252-21cyclictest11:00:250
9254993329,3cyclictest9252-21cyclictest11:00:250
9254993326,5cyclictest9252-21cyclictest12:38:490
9254993326,5cyclictest9252-21cyclictest12:38:490
9254993226,4cyclictest1648-21ntpd10:39:060
9254993226,4cyclictest1648-21ntpd10:39:060
9254993226,4cyclictest1648-21ntpd10:39:060
9254993223,7cyclictest31484-21kernelversion09:35:400
9254993223,7cyclictest31484-21kernelversion09:35:400
9254993223,7cyclictest14970-21processes08:50:450
9254993223,7cyclictest14970-21processes08:50:450
30352320,2sleep30-21swapper/309:45:403
30352320,2sleep30-21swapper/309:45:403
9255993122,7cyclictest17016-21gltestperf11:50:371
9255993122,7cyclictest17016-21gltestperf11:50:371
9254993124,5cyclictest24295-21fschecks_count07:50:370
311572310,2sleep131252-21/usr/sbin/munin11:00:451
311572310,2sleep131252-21/usr/sbin/munin11:00:451
250282310,3sleep1271rcuc/110:45:361
250282310,3sleep1271rcuc/110:45:361
9255993025,3cyclictest2723-21cron08:20:241
9255993025,3cyclictest2723-21cron08:20:241
9255993025,3cyclictest2723-21cron08:20:241
9255993023,5cyclictest9026-21latency_hist11:30:241
9255993023,5cyclictest9026-21latency_hist11:30:241
9255993023,5cyclictest6812-21sshd11:21:031
9255993023,5cyclictest6812-21sshd11:21:031
9254993025,3cyclictest17687-21cut10:25:380
9254993025,3cyclictest17687-21cut10:25:380
89122300,2sleep10-21swapper/110:00:471
89122300,2sleep10-21swapper/110:00:471
192962300,2sleep019359-21fschecks_count10:30:370
192962300,2sleep019359-21fschecks_count10:30:370
9255992924,3cyclictest32256-21needreboot08:10:411
9255992924,3cyclictest32256-21needreboot08:10:411
9255992922,5cyclictest31493-21kernelversion09:35:401
9255992922,5cyclictest31493-21kernelversion09:35:401
9255992922,5cyclictest29887-21fschecks_count08:05:361
9255992922,5cyclictest29887-21fschecks_count08:05:361
9255992922,5cyclictest18931-21sshd10:30:031
9255992922,5cyclictest18931-21sshd10:30:031
9255992922,5cyclictest16189-21cut08:55:371
9255992922,5cyclictest16189-21cut08:55:371
9255992921,6cyclictest13161-21fschecks_time07:20:381
9255992921,6cyclictest10776-21sshd11:34:031
9255992921,6cyclictest10776-21sshd11:34:031
9254992922,4cyclictest0-21swapper/008:10:370
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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