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2026-06-08 - 22:29

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #9, slot #4

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 highest latencies:
System rack9slot4s (updated Mon Jun 08, 2026 12:59:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
54479911811168,8cyclictest31061-21perl09:55:171
54479911091086,20cyclictest0-21swapper/107:25:161
54469910911068,6cyclictest6057-21perl07:25:170
36732563518,29sleep10-21swapper/107:20:071
52142548501,32sleep00-21swapper/007:23:090
121002970,8sleep0544699cyclictest11:55:290
5446998171,7cyclictest0-21swapper/009:55:170
120422770,5sleep0111rcuc/009:05:130
81922750,5sleep0111rcuc/010:20:170
25842560,8sleep0544699cyclictest08:40:130
143182470,9sleep0544699cyclictest07:45:160
5447994014,4cyclictest22-21ksoftirqd/109:11:191
197802380,9sleep0544699cyclictest08:00:090
122632381,5sleep10-21swapper/111:55:321
5447993625,6cyclictest28632-21/usr/sbin/munin11:15:131
544799345,25cyclictest29312-21iostat_ios09:50:191
544699349,13cyclictest30088-21munin-run11:20:000
544699342,10cyclictest81rcu_preempt10:18:080
544699341,12cyclictest81rcu_preempt10:39:100
107512342,28sleep110843-21awk07:35:231
5446993320,7cyclictest19785-21ntp_states10:50:260
5446993311,18cyclictest17375-21apt-get07:54:490
253862331,28sleep125422-21ntp_states11:05:241
199102331,5sleep119917-21iostat_ios09:25:191
544799324,7cyclictest81rcu_preempt09:40:121
5447993226,4cyclictest22-21ksoftirqd/112:50:261
5447993225,4cyclictest22-21ksoftirqd/111:00:011
5447993225,4cyclictest22-21ksoftirqd/110:20:011
5447993225,4cyclictest22-21ksoftirqd/108:30:191
5447993225,4cyclictest22-21ksoftirqd/108:15:011
544699325,12cyclictest11565-21gdbus09:45:230
544699321,4cyclictest81rcu_preempt11:10:100
221452322,4sleep10-21swapper/109:30:261
5447993125,4cyclictest22-21ksoftirqd/111:45:251
5447993124,4cyclictest22-21ksoftirqd/112:40:261
5447993124,4cyclictest22-21ksoftirqd/111:40:001
5447993124,4cyclictest22-21ksoftirqd/111:20:311
5447993124,4cyclictest22-21ksoftirqd/110:35:011
5447993124,4cyclictest22-21ksoftirqd/110:20:221
5447993124,4cyclictest22-21ksoftirqd/110:10:011
5447993124,4cyclictest22-21ksoftirqd/108:30:001
5447993124,4cyclictest22-21ksoftirqd/108:05:011
5447993124,4cyclictest22-21ksoftirqd/107:55:171
5447993124,4cyclictest22-21ksoftirqd/107:45:141
5447993124,4cyclictest22-21ksoftirqd/107:30:041
5447993123,5cyclictest137450irq/90-eth008:40:121
5447993123,4cyclictest22-21ksoftirqd/108:17:281
5447993117,6cyclictest22-21ksoftirqd/112:30:141
5447993116,12cyclictest22-21ksoftirqd/111:04:491
5446993121,5cyclictest11484-21wget10:30:120
5446993119,8cyclictest10050irq/91-xhci_hcd10:45:000
5446993114,5cyclictest2384-21ntpq11:30:240
544699311,25cyclictest6010-21latency_hist08:50:000
544699311,14cyclictest6845-21chrt11:41:520
544699311,11cyclictest81rcu_preempt12:08:430
248282311,5sleep00-21swapper/008:11:500
163052310,5sleep0111rcuc/009:15:220
107042311,26sleep010739-21ntp_states09:00:230
5447993024,4cyclictest22-21ksoftirqd/111:15:011
5447993024,4cyclictest22-21ksoftirqd/109:20:271
5447993023,4cyclictest22-21ksoftirqd/112:50:001
5447993023,4cyclictest22-21ksoftirqd/110:10:201
5447993023,4cyclictest22-21ksoftirqd/110:00:281
5447993023,4cyclictest22-21ksoftirqd/107:40:281
5447993015,8cyclictest23671-21iostat_ios09:35:211
5447993015,4cyclictest22-21ksoftirqd/110:44:451
5447993015,12cyclictest22-21ksoftirqd/108:47:121
5447993014,4cyclictest22-21ksoftirqd/112:05:011
5447993014,4cyclictest22-21ksoftirqd/108:24:101
544699302,15cyclictest11565-21gdbus09:27:170
544699301,4cyclictest81rcu_preempt12:38:150
544699301,26cyclictest2070-21kworker/0:012:50:480
313462301,5sleep00-21swapper/012:47:080
240342301,5sleep10-21swapper/112:29:411
96672291,5sleep00-21swapper/007:33:130
94262291,5sleep00-21swapper/008:56:530
5447992923,4cyclictest22-21ksoftirqd/112:05:001
5447992923,4cyclictest22-21ksoftirqd/110:50:221
5447992922,5cyclictest137450irq/90-eth012:20:131
5447992922,4cyclictest22-21ksoftirqd/109:00:221
5447992922,4cyclictest22-21ksoftirqd/108:50:131
5447992922,4cyclictest22-21ksoftirqd/107:50:271
5447992916,3cyclictest22-21ksoftirqd/110:25:111
5447992914,12cyclictest22-21ksoftirqd/111:44:571
5447992914,12cyclictest22-21ksoftirqd/108:59:241
544699298,7cyclictest14003-21fschecks_count09:10:160
544699297,18cyclictest3820-21df11:35:130
544699294,18cyclictest29402-21memory09:50:210
544699292,14cyclictest0-21swapper/007:59:070
544699291,4cyclictest81rcu_preempt12:33:200
544699291,4cyclictest81rcu_preempt10:58:340
544699291,4cyclictest81rcu_preempt10:04:410
544699291,4cyclictest81rcu_preempt09:33:320
544699291,4cyclictest81rcu_preempt08:17:420
5446992911,6cyclictest30089-21python08:25:270
5446992910,6cyclictest11106-21sort07:35:290
544699290,4cyclictest81rcu_preempt07:40:510
284982291,5sleep00-21swapper/008:20:450
266552291,5sleep00-21swapper/009:44:500
240912291,5sleep00-21swapper/011:01:270
221812291,5sleep00-21swapper/012:24:560
200482291,4sleep00-21swapper/012:17:240
146332291,5sleep10-21swapper/110:36:011
13342291,5sleep00-21swapper/011:29:360
544799282,23cyclictest40250irq/92-i91512:11:361
5447992821,4cyclictest22-21ksoftirqd/112:15:271
5447992821,4cyclictest22-21ksoftirqd/111:50:281
5447992821,4cyclictest22-21ksoftirqd/110:45:591
5447992821,4cyclictest22-21ksoftirqd/109:45:261
544699284,17cyclictest23758-21memory09:35:220
5446992819,5cyclictest17108-21taskset10:45:110
544699281,23cyclictest25768-21tail11:05:290
544699281,18cyclictest0-21swapper/008:06:390
544699281,15cyclictest6829-21/usr/sbin/munin08:50:220
5446992811,5cyclictest2397-21perl10:05:160
52842281,5sleep00-21swapper/010:11:370
31822281,5sleep10-21swapper/111:33:111
309922280,3sleep041ktimersoftd/008:30:110
273892281,5sleep10-21swapper/112:35:341
183132281,5sleep00-21swapper/012:13:560
17632281,5sleep00-21swapper/008:36:400
112622281,5sleep00-21swapper/010:29:580
5447992721,3cyclictest15813-21cstates09:15:131
5447992720,4cyclictest770-21fschecks_time08:35:171
5447992712,4cyclictest22-21ksoftirqd/108:09:021
544699272,13cyclictest10376-21grep11:50:280
544699271,6cyclictest18015-21if_eth009:20:170
544699271,5cyclictest81rcu_preempt12:40:210
5446992711,14cyclictest0-21swapper/012:01:560
131982271,5sleep10-21swapper/109:06:541
5447992616,7cyclictest22-21ksoftirqd/111:25:261
544699261,4cyclictest81rcu_preempt11:23:570
544699261,12cyclictest7617-21entropy11:45:160
5446992515,6cyclictest23492-21wc12:25:350
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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