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2026-04-26 - 22:11

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 792 highest latencies:
System rack9slot4s (updated Sun Apr 26, 2026 12:59:03)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
326809912491207,38cyclictest3523-21strings09:40:230
326819911351087,30cyclictest3286-21runrttasks07:25:131
326809910901058,15cyclictest443-21wget07:25:130
324172569524,30sleep10-21swapper/107:22:501
322632564517,32sleep00-21swapper/007:21:100
3268199238220,15cyclictest3531-21ssh09:40:231
921721100,3sleep112232-21kworker/1:011:38:371
139842850,5sleep113985-21ssh09:15:261
272402820,3sleep0111rcuc/010:45:130
219732820,3sleep041ktimersoftd/011:15:280
122722720,4sleep00-21swapper/012:19:230
242472520,4sleep03268099cyclictest08:25:150
257852500,6sleep03-21ksoftirqd/010:05:300
183132490,6sleep03268099cyclictest11:11:120
314852470,3sleep041ktimersoftd/009:35:240
136812470,5sleep113675-21cron10:30:001
191322460,5sleep019134-21aten_r4power_vo11:50:110
115762450,8sleep03268099cyclictest10:26:270
32680994225,6cyclictest3-21ksoftirqd/011:43:420
32680994125,5cyclictest3-21ksoftirqd/009:16:470
32680994117,8cyclictest3-21ksoftirqd/011:01:140
308042401,35sleep130810-21ssh10:11:251
3268199399,8cyclictest8383-21diskmemload11:58:311
32680993823,5cyclictest3-21ksoftirqd/007:40:400
32680993816,7cyclictest3-21ksoftirqd/012:23:250
32680993815,8cyclictest3-21ksoftirqd/012:12:150
32680993815,8cyclictest3-21ksoftirqd/011:30:470
32680993815,8cyclictest3-21ksoftirqd/009:47:080
32680993815,8cyclictest3-21ksoftirqd/008:37:160
263052380,4sleep03268099cyclictest12:35:140
32680993716,7cyclictest3-21ksoftirqd/009:09:250
32680993715,7cyclictest3-21ksoftirqd/012:41:390
32680993714,8cyclictest3-21ksoftirqd/011:35:020
32680993714,8cyclictest3-21ksoftirqd/010:02:490
32680993714,8cyclictest3-21ksoftirqd/007:32:250
5172361,5sleep112232-21kworker/1:011:28:531
32680993619,6cyclictest21961-21df_inode12:30:150
32680993619,6cyclictest21961-21df_inode12:30:140
32680993613,8cyclictest3-21ksoftirqd/010:58:370
3268199352,15cyclictest2221-21cron11:44:001
32680993519,6cyclictest11565-21gdbus09:24:020
32680993513,8cyclictest3-21ksoftirqd/012:25:170
32680993512,8cyclictest3-21ksoftirqd/010:33:050
32680993512,12cyclictest825-21python12:05:280
3268199345,25cyclictest0-21swapper/111:20:501
32681993412,19cyclictest0-21swapper/112:54:431
3268099349,12cyclictest3-21ksoftirqd/011:25:060
32680993412,7cyclictest3-21ksoftirqd/011:55:440
3268099341,19cyclictest16668-21ntp_states09:55:250
210072341,29sleep121017-21ssh12:29:231
3268199337,23cyclictest0-21swapper/111:00:431
3268199334,25cyclictest0-21swapper/112:24:041
3268099339,13cyclictest3-21ksoftirqd/012:47:130
32680993318,5cyclictest23246-21grep09:25:300
32680993318,5cyclictest23246-21grep09:25:290
32680993318,5cyclictest22965-21df_inode10:40:120
32680993317,5cyclictest2986-21aten_r4power_vo08:55:110
32680993316,6cyclictest27710-21/usr/sbin/munin09:30:300
32680993314,5cyclictest12244-21ssh09:50:230
32680993313,6cyclictest3-21ksoftirqd/011:21:360
32680993313,6cyclictest3-21ksoftirqd/010:53:510
32680993313,6cyclictest29990-21python10:10:280
32680993312,7cyclictest3-21ksoftirqd/007:39:150
32680993311,12cyclictest5480-21missed_timers09:00:200
31702331,4sleep03180-21ssh10:17:010
234182331,13sleep112232-21kworker/1:011:17:301
32680993218,5cyclictest12484-21runrttasks07:54:590
32680993216,6cyclictest19083-21ssh10:35:220
32680993214,5cyclictest12525-21sh09:14:320
32680993212,6cyclictest3-21ksoftirqd/011:07:230
32680993211,6cyclictest3-21ksoftirqd/008:22:520
32680993210,13cyclictest0-21swapper/008:15:240
32680993210,12cyclictest32678-21cyclictest10:22:130
156132321,3sleep015624-21ntp_states11:45:250
32681993121,6cyclictest21323-21taskset10:38:121
3268199312,15cyclictest23199-21hddtemp_smartct10:40:161
3268099319,8cyclictest8761-21ssh12:51:250
3268099319,12cyclictest3-21ksoftirqd/007:58:410
32680993114,6cyclictest0-21swapper/008:05:230
291932311,4sleep129203-21ssh12:38:301
256092311,5sleep10-21swapper/108:29:301
16852311,4sleep11695-21ssh09:39:011
81992301,5sleep10-21swapper/109:08:151
74942301,4sleep17525-21memory07:40:231
3268199301,4cyclictest81rcu_preempt09:47:081
32681993014,12cyclictest3924-21sh12:45:371
3268199301,15cyclictest22004-21chrt10:01:191
32681993011,15cyclictest201072chrt11:14:151
32681993010,16cyclictest2225-21dbus-daemon09:56:331
3268099309,7cyclictest3-21ksoftirqd/007:48:120
3268099307,8cyclictest3-21ksoftirqd/012:02:180
32680993014,5cyclictest26320-21hddtemp_smartct08:30:170
14272301,5sleep10-21swapper/111:30:111
63652291,5sleep10-21swapper/110:58:091
3702291,5sleep00-21swapper/008:46:220
3702291,5sleep00-21swapper/008:46:220
3268199298,17cyclictest0-21swapper/110:05:121
3268199295,21cyclictest0-21swapper/109:14:131
32681992920,5cyclictest14837-21awk10:30:231
32681992919,6cyclictest17507-21timerandwakeup08:05:291
32681992918,7cyclictest5534-21strings09:00:211
32681992915,10cyclictest22-21ksoftirqd/111:08:151
3268199291,4cyclictest81rcu_preempt12:41:391
3268199291,4cyclictest81rcu_preempt12:12:141
3268199291,4cyclictest81rcu_preempt08:37:161
3268199291,23cyclictest28131-21ssh09:31:111
32681992910,16cyclictest201rcuc/108:31:091
32681992910,15cyclictest45902chrt10:19:241
32681992910,15cyclictest0-21swapper/109:26:091
32681992910,15cyclictest0-21swapper/109:26:081
32680992916,5cyclictest0-21swapper/008:40:190
32680992910,11cyclictest0-21swapper/008:11:290
25692291,5sleep10-21swapper/108:54:171
247912291,5sleep10-21swapper/112:33:251
247912291,5sleep10-21swapper/112:33:241
42632281,5sleep10-21swapper/108:56:301
3268199288,16cyclictest0-21swapper/110:24:191
3268199286,18cyclictest0-21swapper/110:46:171
3268199285,4cyclictest81rcu_preempt10:53:511
3268199281,4cyclictest81rcu_preempt11:52:161
3268199281,23cyclictest14704-21ssh11:45:121
3268199281,14cyclictest30498-21ssh12:02:411
32681992810,5cyclictest8480-21sh12:15:071
3268099289,9cyclictest0-21swapper/008:53:570
3042281,5sleep10-21swapper/112:05:201
197902281,5sleep10-21swapper/108:12:471
158622281,5sleep00-21swapper/008:00:550
5912271,5sleep10-21swapper/108:48:381
5912271,5sleep10-21swapper/108:48:371
3268199273,9cyclictest18171-21iostat09:20:201
3268199273,3cyclictest81rcu_preempt07:34:381
3268199273,20cyclictest0-21swapper/108:40:201
218262271,5sleep10-21swapper/108:19:241
151222270,7sleep10-21swapper/108:00:191
124292271,5sleep10-21swapper/107:54:251
3268199265,17cyclictest0-21swapper/109:52:311
3268199264,4cyclictest81rcu_preempt08:22:511
3268199263,18cyclictest9463-21strings07:45:221
32681992617,5cyclictest13407-21cut07:55:231
3268199261,4cyclictest81rcu_preempt07:39:151
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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