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2026-04-29 - 14:20

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 376 highest latencies:
System rack9slot4s (updated Wed Apr 29, 2026 00:59:03)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
303679911871148,33cyclictest305012sleep019:25:040
303689911611131,9cyclictest4409-21cut19:40:011
303689911401131,6cyclictest0-21swapper/119:25:061
300732551507,29sleep10-21swapper/119:22:281
299272477398,64sleep00-21swapper/019:20:550
85202880,9sleep13036899cyclictest22:19:151
294142710,4sleep00-21swapper/023:47:170
206532660,8sleep13036899cyclictest23:05:121
42392580,7sleep03036799cyclictest23:20:420
167192560,8sleep03036799cyclictest20:10:240
3036899528,6cyclictest22-21ksoftirqd/121:50:151
3036899507,13cyclictest22-21ksoftirqd/100:26:151
3036899502,19cyclictest0-21swapper/100:39:461
3036899497,6cyclictest22-21ksoftirqd/121:59:091
30368994916,6cyclictest22-21ksoftirqd/121:36:081
3036899488,5cyclictest2225-21dbus-daemon20:55:211
3036899488,12cyclictest22-21ksoftirqd/122:59:111
3036899485,6cyclictest22-21ksoftirqd/100:17:551
281342481,28sleep028236-21/usr/sbin/munin22:05:280
3036899466,15cyclictest22-21ksoftirqd/100:00:351
3036899465,11cyclictest22-21ksoftirqd/100:12:331
3036899464,11cyclictest22-21ksoftirqd/123:13:511
3036899463,6cyclictest22-21ksoftirqd/122:48:381
3036899458,6cyclictest22-21ksoftirqd/121:45:251
3036899454,14cyclictest22-21ksoftirqd/123:52:021
3036899454,11cyclictest22-21ksoftirqd/122:28:131
3036899453,6cyclictest22-21ksoftirqd/123:24:331
3036899453,6cyclictest22-21ksoftirqd/122:31:201
3036899452,6cyclictest22-21ksoftirqd/121:31:061
3036899452,6cyclictest22-21ksoftirqd/121:22:441
3036899452,6cyclictest22-21ksoftirqd/100:23:031
3036899452,13cyclictest22-21ksoftirqd/122:10:351
30368994512,4cyclictest81rcu_preempt21:18:461
3036899449,6cyclictest22-21ksoftirqd/120:30:271
3036899448,5cyclictest9319-21/usr/sbin/munin22:20:231
3036899443,6cyclictest22-21ksoftirqd/123:45:381
3036899443,6cyclictest22-21ksoftirqd/123:27:381
3036899442,6cyclictest22-21ksoftirqd/100:49:281
30368994417,4cyclictest22-21ksoftirqd/123:17:561
30368994413,6cyclictest22-21ksoftirqd/121:40:411
30368994413,5cyclictest22-21ksoftirqd/121:29:071
136052440,7sleep03036799cyclictest00:38:050
3036899438,6cyclictest22-21ksoftirqd/123:30:221
3036899438,6cyclictest22-21ksoftirqd/100:44:251
3036899438,6cyclictest22-21ksoftirqd/100:30:281
3036899432,6cyclictest22-21ksoftirqd/121:12:071
230342430,7sleep13036899cyclictest22:00:211
3036899429,5cyclictest22-21ksoftirqd/100:05:201
3036899428,6cyclictest6864-21idleruntime19:45:171
3036899428,6cyclictest22-21ksoftirqd/120:20:091
3036899428,6cyclictest22-21ksoftirqd/120:14:241
3036899428,6cyclictest22-21ksoftirqd/119:34:161
3036899428,5cyclictest30471-21watchsnmpd22:41:001
3036899428,5cyclictest22-21ksoftirqd/100:51:021
3036899427,5cyclictest25883-21irqstats20:35:211
3036899426,6cyclictest28464-21sshd20:40:351
3036899426,6cyclictest28464-21sshd20:40:351
3036899426,6cyclictest22-21ksoftirqd/123:40:011
3036899426,6cyclictest22-21ksoftirqd/123:35:531
129792420,8sleep03036799cyclictest23:30:210
3036899418,6cyclictest22-21ksoftirqd/119:41:041
3036899418,5cyclictest4736-21irqstats23:55:201
3036899417,6cyclictest22-21ksoftirqd/123:00:041
3036899408,5cyclictest3286-21runrttasks20:15:151
30368994024,4cyclictest22-21ksoftirqd/120:25:141
3036899401,4cyclictest0-21swapper/122:37:061
3036899399,4cyclictest81rcu_preempt22:05:241
3036899398,6cyclictest22-21ksoftirqd/122:50:141
3036899386,6cyclictest8827-21idleruntime19:50:191
3036899383,5cyclictest22-21ksoftirqd/120:05:101
3036899377,6cyclictest13113-21smartctl-wrappe20:00:271
3036899377,6cyclictest13113-21smartctl-wrappe20:00:271
3036899373,6cyclictest22-21ksoftirqd/121:05:251
30368993723,4cyclictest22-21ksoftirqd/121:00:241
3036799372,11cyclictest0-21swapper/021:27:290
3036799371,24cyclictest0-21swapper/019:40:010
3036899366,10cyclictest22-21ksoftirqd/119:59:181
30368993622,4cyclictest22-21ksoftirqd/120:45:191
3036799361,23cyclictest19301-21/usr/sbin/munin00:10:220
3036799361,22cyclictest28502-21taskset23:13:010
3036899358,6cyclictest22-21ksoftirqd/120:51:221
3036799357,13cyclictest2697-21grep21:40:010
3036799353,11cyclictest81rcu_preempt19:54:300
3036799351,10cyclictest4309-21sort22:15:010
30367993510,12cyclictest13548-21/usr/sbin/munin21:50:250
59572341,4sleep05968-21ssh21:42:450
3036799344,4cyclictest81rcu_preempt00:00:230
3036799341,21cyclictest5076-21ntpq21:05:250
3036799341,21cyclictest14853-21irqstats22:25:210
291642341,4sleep029183-21ntp_states00:20:250
199982341,29sleep019660-21/usr/sbin/munin20:20:170
3036799335,4cyclictest81rcu_preempt23:09:030
3036799334,4cyclictest81rcu_preempt23:15:130
3036799334,4cyclictest81rcu_preempt22:21:490
3036799334,4cyclictest81rcu_preempt00:05:470
3036799333,14cyclictest22902-21ntp_states23:40:260
3036799332,4cyclictest0-21swapper/022:46:410
3036799332,20cyclictest27091-21users21:30:310
3036799331,20cyclictest10177-21basename19:55:110
3036799331,19cyclictest919-21df_inode00:25:130
30367993310,12cyclictest18231-21fschecks_time20:15:150
59212321,9sleep00-21swapper/019:42:250
3036799328,4cyclictest81rcu_preempt23:35:130
3036799328,12cyclictest2225-21dbus-daemon20:34:580
3036799324,4cyclictest81rcu_preempt22:59:120
3036799324,4cyclictest81rcu_preempt00:32:080
30367993222,6cyclictest7707-21ssh21:45:030
3036799322,15cyclictest8270-21memory23:25:220
3036799321,19cyclictest17854-21ssh23:01:330
3036799321,19cyclictest14292-21df20:05:130
3036799321,19cyclictest12885-21/usr/sbin/munin20:00:230
3036799321,19cyclictest12885-21/usr/sbin/munin20:00:220
30367993210,10cyclictest0-21swapper/021:22:480
3036799312,4cyclictest81rcu_preempt22:43:240
3036799312,4cyclictest81rcu_preempt00:48:080
3036799312,14cyclictest24911-21iostat_ios00:50:190
30367993116,11cyclictest2731-21fschecks_time21:00:160
3036799305,13cyclictest0-21swapper/021:15:270
3036799304,4cyclictest81rcu_preempt22:34:340
3036799303,4cyclictest81rcu_preempt22:54:330
3036799302,4cyclictest81rcu_preempt22:00:340
3036799301,4cyclictest81rcu_preempt21:55:080
3036799301,12cyclictest0-21swapper/022:19:130
80032291,5sleep00-21swapper/019:49:350
3036799296,11cyclictest31107-21cat20:50:120
3036799291,4cyclictest81rcu_preempt22:35:310
3036799291,4cyclictest81rcu_preempt00:18:340
230852291,5sleep00-21swapper/020:28:210
173012291,5sleep00-21swapper/000:41:270
306422281,5sleep00-21swapper/020:48:420
3036799285,4cyclictest81rcu_preempt21:10:440
3036799285,4cyclictest81rcu_preempt20:40:350
3036799285,4cyclictest81rcu_preempt20:40:350
3036799281,4cyclictest81rcu_preempt23:50:100
3036799281,12cyclictest11565-21gdbus19:30:380
30367992810,6cyclictest5742-21rm23:55:510
3036799280,26cyclictest111-21usb-storage20:35:500
3036799261,9cyclictest0-21swapper/020:55:560
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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