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2022-08-19 - 12:17

ARM Freescale i.MX6 Quad @996 MHz, Linux 5.16.2-rt19 (Profile)

Latency plot of system in rack #b, slot #7
Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
Command line: cyclictest -l100000000 -m -Sp99 -i200 -h400 -q
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 100, highest latencies:
System rackbslot7 (updated Fri Aug 19, 2022 00:44:18)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1189210417,36sleep20-21swapper/218:57:352
1189210417,36sleep20-21swapper/218:57:352
2118999431,9cyclictest0-21swapper/119:31:581
2118998520,17cyclictest0-21swapper/120:46:581
2111998562,15cyclictest4471-21unixbench_singl23:37:350
2118998349,16cyclictest25-21ksoftirqd/123:41:571
2118998246,28cyclictest25-21ksoftirqd/123:47:001
211199824,46cyclictest6633-21ssh23:42:250
211199815,33cyclictest0-21swapper/019:12:160
211199815,33cyclictest0-21swapper/019:12:160
100427914,33sleep10-21swapper/118:57:291
100427914,33sleep10-21swapper/118:57:291
2111997844,10cyclictest276-21systemd-journal00:26:590
2111997844,10cyclictest276-21systemd-journal00:26:590
2134997759,11cyclictest22115-21munin-plugin-st20:01:573
2118997753,17cyclictest7594-21grep22:47:321
2118997753,17cyclictest7594-21grep22:47:321
2118997741,12cyclictest25-21ksoftirqd/120:32:301
2134997659,11cyclictest4230-21fschecks_count21:47:183
2134997659,11cyclictest4230-21fschecks_count21:47:183
211899767,22cyclictest0-21swapper/119:12:161
211899767,22cyclictest0-21swapper/119:12:161
2111997542,23cyclictest0-21swapper/021:07:000
2111997535,21cyclictest141rcu_preempt19:07:230
2123997456,12cyclictest25276-21unixbench_multi23:17:332
2123997423,20cyclictest11367-21ssh21:58:212
2111997435,24cyclictest141rcu_preempt22:52:260
2123997323,43cyclictest30654-21sh21:37:302
2118997350,16cyclictest11803-40mandb23:52:011
2111997336,8cyclictest141rcu_preempt00:16:590
2111997336,8cyclictest141rcu_preempt00:16:590
2111997332,20cyclictest141rcu_preempt21:22:160
2118997255,10cyclictest5048-21unixbench_singl21:47:321
2118997255,10cyclictest5048-21unixbench_singl21:47:321
2118997246,16cyclictest28192-21unixbench_singl20:17:331
2118997246,16cyclictest28192-21unixbench_singl20:17:331
2111997257,8cyclictest0-21swapper/019:32:200
2111997257,10cyclictest11780-40ogrotate23:51:570
2111997229,12cyclictest141rcu_preempt22:37:000
2111997229,12cyclictest141rcu_preempt22:37:000
300862710,5chrt1-21systemd21:36:592
2123997151,13cyclictest23731-21basename20:06:582
2123997150,13cyclictest2609-21runrttasks19:02:222
2123997126,17cyclictest31849-21taskset23:29:432
2123997115,19cyclictest355-21/usr/sbin/munin22:36:582
2123997115,19cyclictest355-21/usr/sbin/munin22:36:582
2111997127,23cyclictest10823-21in:imklog20:47:260
91822700,5sleep0161rcuc/019:22:000
2123997027,17cyclictest3361-21sh22:41:582
2118997046,16cyclictest31024-21unixbench_multi23:27:341
211199704,12cyclictest12-21ksoftirqd/023:22:330
2111997025,20cyclictest141rcu_preempt20:32:310
2134996938,7cyclictest141rcu_preempt22:16:053
2134996933,19cyclictest276-21systemd-journal22:19:063
2123996921,19cyclictest18778-21cat23:07:202
2123996918,19cyclictest14077-21taskset22:02:372
2123996918,19cyclictest14077-21taskset22:02:372
211899699,32cyclictest117-21pr/ttymxc023:54:361
211899699,32cyclictest117-21pr/ttymxc023:54:361
2118996937,9cyclictest25-21ksoftirqd/123:57:231
2118996935,12cyclictest25-21ksoftirqd/122:42:321
2118996935,12cyclictest25-21ksoftirqd/122:42:321
2111996936,13cyclictest141rcu_preempt19:02:160
211199693,41cyclictest12-21ksoftirqd/020:02:380
2111996933,12cyclictest10823-21in:imklog22:22:280
2123996848,13cyclictest15139-21sendmail21:11:582
2123996842,17cyclictest9135-21diskmemload00:07:322
2118996846,16cyclictest5730-21idleruntime-cro19:11:581
2111996846,15cyclictest9123-21modprobe21:01:570
2111996846,15cyclictest9123-21modprobe21:01:570
2111996842,7cyclictest141rcu_preempt00:07:160
2111996835,17cyclictest12589-21kworker/u8:023:07:210
2111996823,8cyclictest141rcu_preempt23:52:250
2111996823,8cyclictest141rcu_preempt23:52:250
2134996750,11cyclictest276-21systemd-journal23:07:193
2134996743,15cyclictest5850-21kworker/u8:221:46:583
2134996726,17cyclictest117-21pr/ttymxc019:18:233
2134996718,16cyclictest2222-21unixbench_singl20:37:313
2123996721,14cyclictest0-21swapper/222:22:182
2118996738,16cyclictest0-21swapper/121:01:581
2118996738,16cyclictest0-21swapper/121:01:581
2111996752,9cyclictest15312-21latency_hist23:02:000
2111996741,16cyclictest0-21swapper/021:51:570
2111996741,16cyclictest0-21swapper/021:51:570
2111996727,10cyclictest141rcu_preempt00:31:590
36462662,5sleep00-21swapper/020:42:310
256702660,7sleep00-21swapper/021:28:070
2134996642,14cyclictest365-21dbus-daemon22:51:583
2134996642,14cyclictest365-21dbus-daemon22:51:583
213499663,34cyclictest0-21swapper/319:32:203
2134996631,20cyclictest10823-21in:imklog23:33:173
2123996622,17cyclictest4988-21ntp_kernel_err20:47:242
2118996648,11cyclictest26847-21munin-plugin-st23:21:571
2118996640,17cyclictest27182-21latency_hist22:27:001
2118996615,31cyclictest0-21swapper/119:32:151
211199667,21cyclictest0-21swapper/020:37:300
2111996640,8cyclictest141rcu_preempt20:12:320
2111996638,8cyclictest141rcu_preempt19:27:240
2111996633,10cyclictest141rcu_preempt23:17:310
2111996624,25cyclictest0-21swapper/022:02:130
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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