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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 Mon Jul 13, 2026 12:59:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
162199911631141,18cyclictest18093-21invoke-rc.d07:30:001
150552509457,37sleep10-21swapper/107:20:201
160522488442,31sleep00-21swapper/007:23:510
16218997758,15cyclictest20231-21kworker/0:207:30:000
19612650,2sleep012046-21kworker/0:412:25:290
243992610,4sleep1211ktimersoftd/110:35:151
239352490,3sleep10-21swapper/110:35:001
1621999435,4cyclictest21986-21chrt11:55:131
1621999425,5cyclictest355-21smartctl08:05:181
1621999411,8cyclictest22-21ksoftirqd/109:29:181
1621999406,6cyclictest10328-21runrttasks11:24:241
1621999402,8cyclictest2695-21snmpd08:44:331
1621999401,8cyclictest0-21swapper/112:25:131
1621999401,8cyclictest0-21swapper/111:35:111
1621999401,8cyclictest0-21swapper/111:05:281
1621999401,8cyclictest0-21swapper/110:50:131
1621999401,8cyclictest0-21swapper/110:40:091
1621999401,8cyclictest0-21swapper/107:55:141
1621999398,5cyclictest12087-21ntpq08:35:241
1621999393,11cyclictest0-21swapper/110:59:291
1621899391,19cyclictest8834-21hddtemp_smartct12:45:180
1621999388,4cyclictest40250irq/92-i91510:01:471
1621999387,5cyclictest30186-21ntpq12:15:251
1621999387,5cyclictest20781-21ntpq11:50:251
1621999387,5cyclictest19726-21ntpq07:30:251
1621999384,9cyclictest3286-21runrttasks07:45:151
1621999381,9cyclictest0-21swapper/110:25:221
1621999381,8cyclictest0-21swapper/111:10:101
16219993817,10cyclictest20499-21cron09:00:001
252162376,27sleep00-21swapper/012:02:410
1621999377,5cyclictest7964-21ntpq09:50:241
1621999377,5cyclictest19267-21ntpq10:20:241
1621899371,17cyclictest5925-21diskstats08:20:150
1621999367,5cyclictest27284-21ntpq07:50:251
1621999367,5cyclictest24438-21/usr/sbin/munin09:10:211
1621999367,5cyclictest2254-21smartctl08:10:171
1621999363,13cyclictest3286-21runrttasks11:19:451
1621999361,8cyclictest0-21swapper/110:09:481
1621999361,8cyclictest0-21swapper/109:57:151
1621899362,21cyclictest17925-21munin-run11:45:000
250162350,9sleep01621899cyclictest10:35:260
1621999358,7cyclictest22-21ksoftirqd/109:39:411
1621999358,5cyclictest21646-21ntpq07:35:241
1621999357,5cyclictest3496-21ntpq12:30:251
1621999357,4cyclictest81rcu_preempt08:24:211
1621999356,5cyclictest13261-21ntpq11:30:281
1621999356,18cyclictest19766-21sshd11:49:441
1621999352,12cyclictest3286-21runrttasks12:37:321
1621999351,8cyclictest0-21swapper/112:23:001
1621999351,8cyclictest0-21swapper/111:03:241
1621999351,8cyclictest0-21swapper/110:46:291
1621999351,8cyclictest0-21swapper/109:00:471
1621999351,8cyclictest0-21swapper/108:15:131
1621999351,8cyclictest0-21swapper/108:00:541
1621999350,12cyclictest17938-21pidof11:45:001
1621999348,5cyclictest27140-21ntpq09:15:271
1621999348,5cyclictest23535-21ntpq07:40:231
1621999348,5cyclictest10849-21diskstats11:25:141
1621999347,5cyclictest16044-21smartctl08:45:291
1621999346,5cyclictest9361-21smartctl12:45:281
1621999344,6cyclictest22-21ksoftirqd/108:50:351
1621999341,8cyclictest0-21swapper/112:05:261
1621899342,20cyclictest14930-21cut11:35:190
1621899341,21cyclictest8193-21memory08:25:220
1621899341,13cyclictest0-21swapper/010:57:160
259182331,9sleep00-21swapper/007:46:040
1621999339,5cyclictest9557-21cpuspeed_turbos08:30:131
1621999337,6cyclictest27707-21cstates12:10:131
1621999337,6cyclictest22-21ksoftirqd/112:42:081
1621999337,6cyclictest22-21ksoftirqd/109:43:301
1621999337,5cyclictest6285-21smartctl09:45:281
1621999336,6cyclictest22-21ksoftirqd/112:53:191
1621999336,6cyclictest22-21ksoftirqd/112:01:431
1621999336,6cyclictest22-21ksoftirqd/110:16:481
1621999336,6cyclictest22-21ksoftirqd/109:20:451
1621999336,5cyclictest2695-21snmpd10:13:111
16219993312,3cyclictest22-21ksoftirqd/109:07:191
1621899336,5cyclictest81rcu_preempt12:05:180
234392321,27sleep011564-21packagekitd11:58:550
1621999327,6cyclictest22-21ksoftirqd/108:25:241
1621999326,5cyclictest32255-21diskstats09:30:141
1621899328,20cyclictest30896-21sed10:50:290
1621899327,12cyclictest28883-21switchtime10:45:300
1621899325,4cyclictest81rcu_preempt08:10:350
1621899324,3cyclictest81rcu_preempt09:03:080
1621899321,5cyclictest81rcu_preempt09:43:390
1621899321,4cyclictest81rcu_preempt11:49:440
1621899321,4cyclictest81rcu_preempt10:42:180
1621899321,4cyclictest81rcu_preempt08:03:280
16218993210,11cyclictest81rcu_preempt12:20:160
16218993113,5cyclictest11565-21gdbus09:15:330
1621899311,19cyclictest10345-21cpu12:50:140
1621899311,17cyclictest17887-21mailstats08:50:280
1621899311,14cyclictest12123-21awk10:00:310
1621899310,4cyclictest81rcu_preempt12:35:170
1621899310,4cyclictest81rcu_preempt08:09:120
1621899310,4cyclictest81rcu_preempt07:30:570
1621899309,17cyclictest2225-21dbus-daemon09:11:150
1621899302,15cyclictest11565-21gdbus12:17:360
1621899302,14cyclictest28847-21diskstats07:55:160
1621899301,4cyclictest81rcu_preempt11:30:360
1621899301,4cyclictest81rcu_preempt11:15:280
1621899301,4cyclictest81rcu_preempt08:17:030
1621899301,4cyclictest81rcu_preempt07:51:180
1621899301,14cyclictest12085-21ntpq08:35:240
1621899296,12cyclictest81rcu_preempt07:40:120
1621899293,9cyclictest9564-21cpuspeed_turbos08:30:130
1621899293,13cyclictest0-21swapper/011:50:240
16218992922,4cyclictest20231-21kworker/0:208:45:130
1621899291,4cyclictest81rcu_preempt11:28:230
1621899291,4cyclictest81rcu_preempt11:03:360
1621899291,14cyclictest5369-21cut11:10:150
1621899291,10cyclictest81rcu_preempt07:37:140
1621899290,4cyclictest81rcu_preempt09:08:040
1621899290,4cyclictest81rcu_preempt08:58:210
1621899285,11cyclictest0-21swapper/008:40:260
1621899283,12cyclictest9046-21fschecks_count11:20:160
1621899282,13cyclictest7735-21iostat09:50:190
1621899282,13cyclictest14765-21aten_r4power_vo10:10:120
1621899281,14cyclictest2432-21/usr/sbin/munin09:35:260
1621899281,14cyclictest2225-21dbus-daemon10:18:260
1621899281,14cyclictest2225-21dbus-daemon09:33:390
16218992811,4cyclictest0-21swapper/010:34:450
16218992810,6cyclictest20624-21diskstats10:25:150
16218992810,15cyclictest0-21swapper/009:25:470
106722281,4sleep00-21swapper/009:59:280
66712271,5sleep00-21swapper/009:46:510
295142271,5sleep00-21swapper/009:20:490
1621899279,6cyclictest3923-21unixbench_singl12:30:320
1621899278,6cyclictest2695-21snmpd12:40:220
1621899271,13cyclictest27930-21fschecks_time12:10:160
1621899271,12cyclictest3849-21grep11:05:240
1621899261,22cyclictest0-21swapper/010:20:030
143442261,4sleep00-21swapper/010:08:230
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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