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2023-01-30 - 05:42

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 50 highest latencies:
System rackbslot7 (updated Mon Jan 30, 2023 00:44:18)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
422421100,4chrt4223-21ntp_states21:17:203
224999910920,12cyclictest0-21swapper/023:51:460
22330210413,49sleep322366-21munin-run19:06:453
22499991022,18cyclictest21084-21grep20:37:350
22499991022,18cyclictest21084-21grep20:37:350
22404210214,60sleep222357-21latency_hist19:06:482
22511991003,62cyclictest28166-21ssh21:57:131
22499999922,11cyclictest0-21swapper/021:17:120
2249999973,11cyclictest8622-21/usr/sbin/munin23:12:240
22499999729,11cyclictest0-21swapper/023:26:470
2249999968,32cyclictest0-21swapper/023:11:460
2249999968,32cyclictest0-21swapper/023:11:460
22499999532,55cyclictest0-21swapper/000:02:110
22499999532,55cyclictest0-21swapper/000:02:110
2249999943,13cyclictest20064-21latency_hist20:36:470
2249999933,33cyclictest7293-21latency_hist22:16:470
22499999320,8cyclictest0-21swapper/022:22:090
2249999923,14cyclictest11650-21/usr/sbin/munin23:17:080
2251199912,60cyclictest8811-21latency_hist00:06:471
2251199912,60cyclictest8811-21latency_hist00:06:471
2249999912,16cyclictest3459-21cpuspeed23:57:090
2249999912,13cyclictest3472-21ssh21:16:470
2249999912,13cyclictest3472-21ssh21:16:470
22499999121,19cyclictest0-21swapper/019:57:180
22499999115,17cyclictest25412-21cat19:12:210
2249999903,29cyclictest0-21swapper/021:22:250
22499999018,15cyclictest0-21swapper/000:12:100
2249999893,19cyclictest18437-21ntpq23:27:300
22499998924,10cyclictest0-21swapper/022:31:480
2249999883,10cyclictest15757-21ssh21:37:000
22499998821,9cyclictest30937-21kworker/u8:220:26:440
22533998710,37cyclictest23205-21df_inode22:42:153
2249999874,11cyclictest0-21swapper/022:01:470
2249999872,28cyclictest29601-21diskmemload21:09:350
2249999864,27cyclictest0-21swapper/022:04:030
2249999864,27cyclictest0-21swapper/022:04:030
2249999863,22cyclictest20081-21fschecks_count22:37:110
2251199853,56cyclictest26080-21apt-get22:47:081
2249999853,17cyclictest29588-21/usr/sbin/munin19:27:190
22499998522,9cyclictest0-21swapper/023:02:140
22499998516,13cyclictest0-21swapper/020:17:220
22499998516,13cyclictest0-21swapper/020:17:220
2251199842,48cyclictest394-21apt19:37:001
2249999844,29cyclictest0-21swapper/019:56:470
22533998359,15cyclictest18906-21unixbench_singl23:27:383
2249999836,28cyclictest0-21swapper/019:11:480
2249999834,22cyclictest22489-21cyclictest19:06:490
2249999833,14cyclictest27991-21modprobe21:01:450
2249999833,14cyclictest27991-21modprobe21:01:450
2249999832,33cyclictest26484-21fschecks_time22:47:260
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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