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2026-05-29 - 18:22

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 May 29, 2026 12:44:17)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
315882750,3sleep20-21swapper/212:28:012
315882750,3sleep20-21swapper/212:28:012
255422720,3sleep20-21swapper/212:12:582
255422720,3sleep20-21swapper/212:12:582
309522650,3sleep10-21swapper/107:52:511
309522650,3sleep10-21swapper/107:52:511
34162620,2sleep13418-21latency_hist12:42:391
34162620,2sleep13418-21latency_hist12:42:391
223142610,2chrt21515-21/usr/sbin/munin09:12:591
223142610,2chrt21515-21/usr/sbin/munin09:12:591
223142610,2chrt21515-21/usr/sbin/munin09:12:591
224482600,3sleep30-21swapper/310:37:593
224482600,3sleep30-21swapper/310:37:593
113722590,3sleep0171ktimers/008:42:390
236222570,2sleep20-21swapper/207:22:572
52092540,3chrt0-21swapper/311:17:593
52092540,3chrt0-21swapper/311:17:593
307392540,3sleep130744-21gltestperf12:27:521
204532530,3sleep30-21swapper/309:07:583
204532530,3sleep30-21swapper/309:07:583
204532530,3sleep30-21swapper/309:07:583
26962500,3sleep10-21swapper/109:47:561
26962500,3sleep10-21swapper/109:47:561
276832450,3sleep20-21swapper/212:18:002
276832450,3sleep20-21swapper/212:18:002
96742410,3sleep20-21swapper/210:05:102
96742410,3sleep20-21swapper/210:05:102
96742410,3sleep20-21swapper/210:05:102
213102410,1sleep121468-21if_eth012:02:521
213102410,1sleep121468-21if_eth012:02:521
213102410,1sleep121468-21if_eth012:02:521
286502400,2sleep11346-21avahi-daemon10:55:181
286502400,2sleep11346-21avahi-daemon10:55:181
20890994031,7cyclictest14678-21systemd-journal10:05:241
20890994031,7cyclictest14678-21systemd-journal10:05:241
20890994031,7cyclictest14678-21systemd-journal10:05:241
251562390,3sleep00-21swapper/012:12:510
251562390,3sleep00-21swapper/012:12:510
235272390,3sleep10-21swapper/109:17:491
235272390,3sleep10-21swapper/109:17:491
148012390,2chrt14802-21/usr/sbin/munin08:52:571
148012390,2chrt14802-21/usr/sbin/munin08:52:571
20890993829,7cyclictest6731-21netstat11:22:571
20890993829,7cyclictest6731-21netstat11:22:571
169832370,4chrt0-21swapper/308:58:013
169832370,4chrt0-21swapper/308:58:013
289612360,4sleep00-21swapper/009:32:480
289612360,4sleep00-21swapper/009:32:480
20890993627,7cyclictest32760-21kernelversion12:32:541
20890993627,7cyclictest32760-21kernelversion12:32:541
20883993630,5cyclictest2390-21fschecks_count08:07:500
20883993630,5cyclictest2390-21fschecks_count08:07:500
20883993628,6cyclictest648-21gltestperf11:07:520
20883993628,6cyclictest648-21gltestperf11:07:520
43572350,4sleep20-21swapper/211:17:502
43572350,4sleep20-21swapper/211:17:502
20890993529,4cyclictest674-21gpm11:52:521
20890993529,4cyclictest674-21gpm11:52:521
20890993429,2cyclictest0-21swapper/108:02:381
20890993429,2cyclictest0-21swapper/108:02:381
20890993427,5cyclictest30520-21fschecks_count12:27:511
291532330,2sleep20-21swapper/212:22:552
291532330,2sleep20-21swapper/212:22:552
291532330,2sleep20-21swapper/212:22:552
269832330,2sleep30-21swapper/307:37:393
269832330,2sleep30-21swapper/307:37:393
20890993327,4cyclictest16661-21needreboot10:22:551
20890993327,4cyclictest16661-21needreboot10:22:551
20890993327,4cyclictest16661-21needreboot10:22:551
20883993328,3cyclictest0-21swapper/011:02:380
20883993328,3cyclictest0-21swapper/011:02:380
20883993328,3cyclictest0-21swapper/011:02:380
20883993328,3cyclictest0-21swapper/011:02:380
20890993224,6cyclictest21912-21gltestperf10:37:521
20890993224,6cyclictest21912-21gltestperf10:37:521
20890993222,8cyclictest27450-21cut09:27:521
20890993222,8cyclictest27450-21cut09:27:521
20890993222,7cyclictest19934-21fschecks_time09:07:521
20890993222,7cyclictest19934-21fschecks_time09:07:521
20890993222,7cyclictest19934-21fschecks_time09:07:521
20890993215,5cyclictest29-21ksoftirqd/108:02:511
20890993215,5cyclictest29-21ksoftirqd/108:02:511
20883993224,6cyclictest32526-21fschecks_time12:32:520
20883993224,6cyclictest32526-21fschecks_time12:32:520
2089099317,5cyclictest281ktimers/107:51:481
2089099317,5cyclictest281ktimers/107:51:481
20890993124,5cyclictest692-21gltestperf09:42:521
20890993124,5cyclictest10733-21timerandwakeup08:37:591
20890993118,4cyclictest181rcu_preempt10:10:591
20890993118,4cyclictest181rcu_preempt10:10:591
20890993118,4cyclictest181rcu_preempt10:10:591
20890993116,3cyclictest181rcu_preempt11:37:531
20890993116,3cyclictest181rcu_preempt11:37:531
20883993124,5cyclictest8075-21wc08:27:590
20883993124,5cyclictest8075-21wc08:27:590
20883993124,5cyclictest8075-21wc08:27:590
20883993123,6cyclictest15281-21latency_hist11:47:440
20883993123,6cyclictest15281-21latency_hist11:47:440
20890993026,2cyclictest0-21swapper/108:37:381
20890993026,2cyclictest0-21swapper/108:37:381
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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