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2026-09-20 - 17:56

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 Sun Sep 20, 2026 12:59:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
89279912551230,22cyclictest9177-21wget07:25:131
89269911291084,33cyclictest9446-21fschecks_count07:25:150
86902639556,40sleep10-21swapper/107:23:051
85562474425,32sleep00-21swapper/007:21:410
574821010,9sleep0892699cyclictest10:05:120
297072750,3sleep00-21swapper/012:35:120
892699581,20cyclictest32278-21taskset08:23:440
892699564,8cyclictest22748-21diskstats10:50:160
892699563,8cyclictest16757-21diskstats12:00:150
8926995513,15cyclictest3-21ksoftirqd/010:56:250
892699551,15cyclictest8664-21processes08:45:260
303362550,2sleep030338-21fschecks_count11:10:160
892699543,17cyclictest578-21ntp_states09:50:240
892699532,13cyclictest19895-21unixbench_multi10:40:290
892699531,12cyclictest29417-21awk09:40:260
892699525,14cyclictest0-21swapper/009:15:110
892699502,14cyclictest4256-21df08:35:140
892699502,14cyclictest12013-21ntp_states10:20:250
892699502,13cyclictest15873-21iostat09:05:200
892699501,14cyclictest17242-21grep10:35:160
892699482,14cyclictest27392-21ntp_states09:35:260
892699481,13cyclictest5353-21cron10:05:000
892699481,13cyclictest13909-21/usr/sbin/munin09:00:180
892699472,13cyclictest29381-21iostat08:15:200
892699472,13cyclictest29381-21iostat08:15:200
40972420,4sleep1201rcuc/111:25:241
246762400,9sleep1892799cyclictest12:20:211
8927993617,7cyclictest30725-21fschecks_count09:45:171
892699364,16cyclictest9528-21iostat_ios11:40:190
8926993512,11cyclictest3-21ksoftirqd/008:50:280
892699347,12cyclictest11565-21gdbus12:05:030
8927993312,8cyclictest2225-21dbus-daemon10:10:121
892699332,19cyclictest15927-21df07:40:120
185522331,28sleep018714-21awk07:45:290
892799325,16cyclictest40250irq/92-i91508:48:181
892799321,13cyclictest161632grep09:05:271
892699322,15cyclictest11038-21snmpd07:33:230
892699321,4cyclictest81rcu_preempt09:10:280
281962321,4sleep10-21swapper/109:39:151
892799314,4cyclictest81rcu_preempt12:49:041
892799314,4cyclictest81rcu_preempt09:19:151
892799312,4cyclictest81rcu_preempt08:58:481
8927993120,6cyclictest30531-21munin-run08:20:001
8927993120,6cyclictest30531-21munin-run08:20:001
892699316,13cyclictest14316-21taskset11:54:080
8926993116,11cyclictest12272-21sshd11:47:240
8926993110,11cyclictest3-21ksoftirqd/011:34:150
892799307,9cyclictest0-21swapper/109:13:021
892799305,9cyclictest29408-21sendmail_mailqu09:40:261
892799303,14cyclictest18634-21diskstats12:05:151
8927993020,7cyclictest32572-21cut08:25:121
8927993012,5cyclictest3286-21runrttasks10:53:331
892699305,16cyclictest0-21swapper/008:04:020
892699303,13cyclictest3207-21ntpd12:40:220
892699303,13cyclictest3207-21ntpd12:40:220
892699302,15cyclictest3226-21diskstats12:50:140
892699301,4cyclictest81rcu_preempt12:45:370
8926993010,6cyclictest7396-21runrttasks08:43:070
56202300,9sleep1892799cyclictest11:30:161
210302300,9sleep1892799cyclictest09:20:111
892799299,7cyclictest22854-21aten_r4power_en09:25:131
892799294,4cyclictest81rcu_preempt11:13:551
892799294,4cyclictest81rcu_preempt10:24:561
892799294,18cyclictest25339-21diskstats08:05:161
892799292,14cyclictest0-21swapper/112:36:041
8927992920,6cyclictest5709-21munin-plugin-st08:40:001
8927992919,6cyclictest7522-21chrt11:35:171
8927992915,11cyclictest22-21ksoftirqd/112:15:191
892799291,4cyclictest81rcu_preempt11:47:301
892799291,4cyclictest81rcu_preempt10:43:411
8927992912,14cyclictest22-21ksoftirqd/111:57:591
8927992910,5cyclictest6213-21missed_timers10:05:211
892699293,14cyclictest22177-21runrttasks10:48:540
892699293,14cyclictest0-21swapper/010:17:220
892699292,12cyclictest2244-21irqstats09:55:190
892699291,15cyclictest3640-21taskset08:33:140
892699291,15cyclictest27579-21cron12:30:000
8926992910,6cyclictest8143-21strings10:10:230
8926992910,5cyclictest27421-21http_loadtime08:10:190
49322291,5sleep10-21swapper/110:00:401
42652291,5sleep10-21swapper/112:50:591
292702291,5sleep10-21swapper/112:33:111
224912291,5sleep00-21swapper/009:23:250
13722291,5sleep10-21swapper/109:54:071
131062291,5sleep10-21swapper/107:32:421
892799285,4cyclictest81rcu_preempt10:15:571
892799283,4cyclictest81rcu_preempt11:40:081
892799281,15cyclictest0-21swapper/107:38:251
892799280,4cyclictest81rcu_preempt12:02:591
892699282,14cyclictest32313-21perl11:15:160
892699282,14cyclictest0-21swapper/008:08:420
892699282,13cyclictest21567-21diskstats07:55:150
892699281,4cyclictest81rcu_preempt09:46:530
8926992812,5cyclictest11564-21packagekitd12:19:240
892699281,16cyclictest0-21swapper/008:25:220
892699281,14cyclictest26250-21wget11:00:110
892699281,14cyclictest23514-21sort09:25:240
892699281,14cyclictest19691-21diskstats07:50:140
892699281,13cyclictest12539-21/usr/sbin/munin08:55:280
36042281,5sleep10-21swapper/108:32:551
323002281,5sleep10-21swapper/108:24:001
29502281,5sleep10-21swapper/111:23:271
234582281,5sleep10-21swapper/108:00:151
219102281,5sleep10-21swapper/110:46:061
165822281,5sleep10-21swapper/110:34:261
112262281,5sleep10-21swapper/108:53:521
892799275,4cyclictest81rcu_preempt11:50:481
892799274,4cyclictest81rcu_preempt11:02:131
892799274,4cyclictest81rcu_preempt10:25:211
892799273,8cyclictest24979-21diskstats09:30:131
892799272,18cyclictest17520-21/usr/sbin/munin07:45:311
8927992718,5cyclictest17499-21cat10:35:231
8927992711,12cyclictest19611-21cpuspeed_turbos07:50:131
892699272,5cyclictest81rcu_preempt12:30:130
892699272,13cyclictest7619-21iostat11:35:190
892699272,13cyclictest20498-21df12:10:160
892699272,12cyclictest24979-21diskstats09:30:140
892699271,4cyclictest81rcu_preempt10:32:220
892699271,13cyclictest4930-21sshd11:29:240
892699271,13cyclictest2444-21timerwakeupswit11:20:260
72432271,5sleep10-21swapper/108:41:321
31572271,5sleep10-21swapper/109:57:031
296172271,5sleep10-21swapper/111:08:011
282012271,5sleep10-21swapper/108:10:351
227972271,5sleep10-21swapper/107:58:061
148332271,5sleep10-21swapper/109:02:041
892799269,5cyclictest81rcu_preempt07:40:121
892799261,4cyclictest81rcu_preempt11:17:391
892799261,4cyclictest81rcu_preempt10:57:241
892799261,12cyclictest0-21swapper/112:27:381
892699269,5cyclictest25250-21/usr/sbin/munin12:20:280
892699262,12cyclictest14982-21apt-get07:37:210
8926992617,5cyclictest13109-21aten_r4power_en10:25:120
892699261,14cyclictest28212-21egrep11:05:130
8927992517,5cyclictest22-21ksoftirqd/112:43:011
8927992517,5cyclictest22-21ksoftirqd/112:43:011
8927992510,4cyclictest40250irq/92-i91512:10:151
892699251,6cyclictest3286-21runrttasks11:58:470
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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