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2026-06-04 - 01:14

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 Wed Jun 03, 2026 12:59:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
6469912471229,15cyclictest0-21swapper/107:25:121
6469911951159,31cyclictest23795-21perl12:40:171
4902666619,31sleep10-21swapper/107:23:581
326322562516,31sleep00-21swapper/007:20:340
64599165142,16cyclictest788-21/usr/sbin/munin07:25:120
2151921110,8sleep064599cyclictest09:40:290
645999076,11cyclictest0-21swapper/012:40:160
201912840,9sleep064599cyclictest12:30:200
248792570,8sleep064599cyclictest09:50:240
64699442,11cyclictest25046-21latency08:25:221
64699417,5cyclictest22-21ksoftirqd/107:52:311
64699411,8cyclictest0-21swapper/111:12:011
64699411,19cyclictest3207-21ntpd09:35:221
64699408,5cyclictest28124-21/usr/sbin/munin08:35:291
64699407,5cyclictest22-21ksoftirqd/107:36:111
64699401,9cyclictest0-21swapper/110:05:211
64699401,8cyclictest0-21swapper/111:36:081
64699401,8cyclictest0-21swapper/110:20:121
64699398,5cyclictest17684-21ntpq08:05:261
64699398,5cyclictest17684-21ntpq08:05:251
64699391,8cyclictest0-21swapper/112:05:111
64699391,8cyclictest0-21swapper/111:55:181
64699391,8cyclictest0-21swapper/111:05:541
64699391,8cyclictest0-21swapper/110:30:111
64699391,8cyclictest0-21swapper/109:45:111
64699391,8cyclictest0-21swapper/109:45:111
64699391,8cyclictest0-21swapper/107:33:301
645993912,14cyclictest21426-21ntp_states08:15:240
64699388,6cyclictest15111-21/usr/sbin/munin09:25:171
64699387,5cyclictest30843-21ntpq08:40:241
64699381,8cyclictest0-21swapper/112:15:121
64699381,8cyclictest0-21swapper/110:10:211
64699381,8cyclictest0-21swapper/108:20:141
64699381,8cyclictest0-21swapper/107:45:211
94492370,6sleep1201rcuc/109:10:151
64699377,5cyclictest22-21ksoftirqd/111:20:181
64699371,12cyclictest6191-21cat11:54:551
645993716,6cyclictest29137-21python08:35:280
64599371,15cyclictest0-21swapper/010:43:290
64699368,6cyclictest22-21ksoftirqd/108:31:241
64699367,6cyclictest22-21ksoftirqd/112:29:011
64699366,6cyclictest22-21ksoftirqd/108:58:291
64699365,18cyclictest2457-21sshd10:17:301
64699364,6cyclictest22-21ksoftirqd/110:39:291
646993626,6cyclictest2695-21snmpd09:31:161
64599367,4cyclictest81rcu_preempt10:35:000
64599361,12cyclictest0-21swapper/011:15:360
170922361,4sleep017148-21/usr/sbin/munin10:55:270
64699358,6cyclictest22-21ksoftirqd/110:42:081
64699358,6cyclictest16616-21ntpq12:20:221
64699358,5cyclictest6226-21smartctl09:00:281
64699358,5cyclictest2695-21snmpd10:04:111
64699358,5cyclictest22430-21smartctl12:35:271
64699357,6cyclictest22-21ksoftirqd/110:55:551
64699357,6cyclictest22-21ksoftirqd/108:52:401
64699351,8cyclictest0-21swapper/110:27:021
64699351,8cyclictest0-21swapper/110:27:011
64599359,13cyclictest5679-21fschecks_count07:35:160
64599356,26cyclictest30883-21runrttasks11:33:410
64599351,11cyclictest81rcu_preempt11:25:520
64699348,7cyclictest22-21ksoftirqd/109:55:261
64699348,6cyclictest30317-21smartctl11:30:261
64699348,5cyclictest2695-21snmpd08:18:481
64699348,5cyclictest12850-21ntpq12:10:271
64699348,5cyclictest11343-21smartctl09:15:191
64699347,6cyclictest22-21ksoftirqd/112:50:091
64699347,6cyclictest22-21ksoftirqd/111:25:071
64699347,6cyclictest22-21ksoftirqd/111:16:201
64699347,6cyclictest22-21ksoftirqd/110:51:171
64699347,6cyclictest22-21ksoftirqd/109:53:161
64699347,6cyclictest22-21ksoftirqd/108:02:491
64699347,6cyclictest14099-21smartctl07:55:291
64699347,5cyclictest20556-21smartctl12:30:271
64699341,20cyclictest0-21swapper/109:24:161
64599341,21cyclictest704-21users08:45:310
64599341,13cyclictest0-21swapper/012:15:300
645993410,11cyclictest17749-21/usr/sbin/munin12:25:130
320072341,29sleep032054-21grep11:35:240
217512341,5sleep10-21swapper/109:42:421
64699339,12cyclictest7915-21runrttasks09:05:241
64699338,5cyclictest8271-21ntpq07:40:241
64699338,5cyclictest3448-21ntpq11:45:251
64699338,5cyclictest26228-21smartctl12:45:261
64699338,5cyclictest18521-21hddtemp_smartct11:00:181
64699337,6cyclictest22-21ksoftirqd/108:49:161
64699337,5cyclictest22-21ksoftirqd/110:45:111
64699336,7cyclictest22-21ksoftirqd/111:40:171
64699328,5cyclictest8558-21diskstats12:00:141
64699327,6cyclictest22-21ksoftirqd/108:11:191
64599327,13cyclictest2225-21dbus-daemon11:22:080
64599321,9cyclictest11358-21grep07:50:130
64599321,4cyclictest81rcu_preempt11:51:000
64599321,4cyclictest81rcu_preempt09:12:400
64599321,18cyclictest7904-21fschecks_time07:40:180
64599318,11cyclictest81rcu_preempt08:50:170
64599311,13cyclictest911-21/usr/sbin/munin11:40:150
645993110,8cyclictest18028-21/usr/sbin/munin11:00:270
59072311,26sleep06065-21unixbench_singl10:25:300
59072311,26sleep06065-21unixbench_singl10:25:300
64599307,11cyclictest22856-21timerandwakeup11:10:290
64599301,5cyclictest81rcu_preempt08:20:300
64599301,4cyclictest81rcu_preempt12:47:010
64599301,4cyclictest81rcu_preempt11:05:450
64599301,4cyclictest81rcu_preempt10:16:290
64599301,4cyclictest81rcu_preempt10:13:180
64599301,4cyclictest81rcu_preempt09:48:190
64599301,4cyclictest81rcu_preempt09:48:180
64599301,4cyclictest81rcu_preempt09:35:490
64599300,4cyclictest81rcu_preempt09:28:500
64599300,4cyclictest81rcu_preempt09:22:300
64599297,5cyclictest15005-21aten_r4power_en08:00:110
64599296,4cyclictest81rcu_preempt08:44:560
64599292,14cyclictest28075-21df_inode10:00:140
64599292,14cyclictest11565-21gdbus12:50:180
64599291,4cyclictest81rcu_preempt12:23:480
64599291,4cyclictest81rcu_preempt12:04:280
645992911,5cyclictest13205-21ntp_states10:45:240
645992910,6cyclictest19525-21/usr/sbin/munin08:10:240
64599290,3cyclictest81rcu_preempt07:32:540
64599289,15cyclictest177802chrt09:30:330
64599284,5cyclictest0-21swapper/010:08:400
64599283,4cyclictest81rcu_preempt08:55:030
64599282,4cyclictest81rcu_preempt08:30:190
64599281,4cyclictest81rcu_preempt12:05:230
64599281,4cyclictest81rcu_preempt07:48:580
645992812,5cyclictest26173-21df09:55:130
64599281,18cyclictest0-21swapper/010:51:510
64599281,18cyclictest0-21swapper/008:27:460
214012281,5sleep00-21swapper/012:35:040
64599276,7cyclictest6861-21hddtemp_smartct11:55:170
64599276,18cyclictest147882chrt07:59:590
64599272,4cyclictest81rcu_preempt10:20:570
64599271,4cyclictest81rcu_preempt09:00:500
64599271,14cyclictest16894-21aten_r4power_en08:05:120
64599271,14cyclictest16894-21aten_r4power_en08:05:110
64599271,13cyclictest9362-21taskset10:35:220
42252271,5sleep00-21swapper/011:48:590
124492271,5sleep00-21swapper/009:18:550
64599262,12cyclictest7916-21ntp_states09:05:240
64599261,6cyclictest0-21swapper/012:10:310
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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