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2026-08-15 - 15:15

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #2, slot #7

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 100 highest latencies:
System rack2slot7s.osadl.org (updated Sat Aug 15, 2026 12:43:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1256934995532,21cyclictest1256930-21cyclictest10:55:592
1256932995229,15cyclictest12650irq/32-eth007:11:000
125693499513,40cyclictest1403086-21ssh12:11:042
1256933995039,6cyclictest1282444-21kworker/u8:2-xprtiod10:00:011
1256934994939,6cyclictest1344716-21wc10:35:022
1256933994938,7cyclictest1393852-21needreboot11:55:571
1256932994941,5cyclictest151ktimers/010:01:030
1256932994941,5cyclictest151ktimers/010:01:030
125693499484,40cyclictest1348919-21ssh10:41:012
1256934994843,2cyclictest0-21swapper/209:31:052
1256933994839,6cyclictest1392787-21systemd-run11:55:011
1256933994838,4cyclictest0-21swapper/109:36:011
1256934994739,5cyclictest1335610-21awk10:20:012
1256933994730,12cyclictest1405876-21needreboot12:15:541
1256933994638,4cyclictest0-21swapper/111:36:001
1256933994637,4cyclictest0-21swapper/109:15:551
125693499452,16cyclictest1369863-21ssh11:16:022
1256932994525,14cyclictest12650irq/32-eth011:30:590
1256932994522,15cyclictest12650irq/32-eth010:56:000
1256934994434,6cyclictest1285427-21sh08:45:012
1256934994434,5cyclictest1290851-21kworker/u8:4-rpciod10:00:522
1256934994434,5cyclictest1290851-21kworker/u8:4-rpciod10:00:522
1256934994429,11cyclictest1345557-21kernelversion10:35:522
125693499441,20cyclictest1385035-21ssh11:41:032
1256932994411,15cyclictest14-21ksoftirqd/009:15:550
1256934994335,4cyclictest0-21swapper/209:46:042
125693499432,8cyclictest1309479-21ssh09:36:002
1256934994325,14cyclictest0-21swapper/211:31:102
1256934994320,19cyclictest0-21swapper/212:26:042
125693499431,4cyclictest1336781-21ssh10:20:582
125693499431,18cyclictest1363826-21ntpq11:05:552
1256932994336,4cyclictest1419917-21systemd-run12:40:020
1256932994335,6cyclictest421-21dbus-daemon07:20:010
125693499422,6cyclictest1351883-21ntpq10:45:592
125693499422,6cyclictest1277398-21ntpq08:16:022
1256934994218,21cyclictest1276412-21ls08:15:012
125693499421,14cyclictest1318531-21ntpq09:50:582
125693499421,11cyclictest1278783-21ntpq08:20:552
1256933994233,5cyclictest1003-21mta-sts-daemon10:01:001
1256933994233,5cyclictest1003-21mta-sts-daemon10:01:001
1256933994231,7cyclictest420-21avahi-daemon09:55:021
1256934994127,11cyclictest0-21swapper/212:40:012
125693499412,6cyclictest1393978-21ntpq11:56:022
125693499412,5cyclictest1375978-21ntpq11:26:002
125693499412,15cyclictest1300292-21ntpq09:20:592
125693499411,9cyclictest1265281-21ntpq07:35:562
125693499411,9cyclictest1263869-21ntpq07:30:592
125693499411,9cyclictest1263869-21ntpq07:30:592
125693499411,5cyclictest1287779-21ntpq08:50:562
125693499411,10cyclictest1286395-21ntpq08:46:042
1256933994132,6cyclictest1399559-21fschecks_count12:05:491
125693499403,9cyclictest1408982-21ssh12:20:572
125693499403,27cyclictest1321611-21rm09:55:592
1256934994032,5cyclictest1291445-21systemd-run09:05:012
1256934994029,7cyclictest265-21systemd-journal09:20:012
1256934994027,8cyclictest265-21systemd-journal12:15:132
125693499402,5cyclictest1266842-21ntpq07:40:572
125693499402,30cyclictest1400037-21ssh12:05:592
125693499402,15cyclictest1360836-21ntpq11:00:562
125693499402,14cyclictest1312475-21ntpq09:41:012
125693499401,5cyclictest1330732-21ntpq10:10:582
125693499401,5cyclictest1268411-21ntpq07:46:022
125693499401,11cyclictest1355812-21ssh10:52:162
125693499401,10cyclictest1258223-21timerwakeupswit07:11:072
1256933994031,6cyclictest1-21systemd11:05:011
1256933994030,6cyclictest459389-21cups-browsed12:29:051
1256933994029,7cyclictest459389-21cups-browsed09:28:161
1256932994024,14cyclictest1275994-21systemctl08:11:030
1256932994010,7cyclictest0-21swapper/009:56:000
125693499393,7cyclictest1294156-21ntpq09:11:002
125693499393,6cyclictest1260811-21ntpq07:20:572
125693499392,5cyclictest1281855-21ntpq08:30:592
125693499391,9cyclictest1269788-21ntpq07:50:572
125693499391,12cyclictest1327725-21ntpq10:05:592
125693499391,12cyclictest1327725-21ntpq10:05:592
125693499391,11cyclictest1387966-21ssh11:46:002
125693499391,10cyclictest1366585-21irqstats11:10:522
125693499391,10cyclictest1366585-21irqstats11:10:522
1256933993933,3cyclictest0-21swapper/112:34:141
1256933993932,3cyclictest0-21swapper/110:21:041
1256933993930,6cyclictest1384712-21latency11:40:531
1256932993934,3cyclictest1316034-21unixbench-2d09:46:100
1256932993933,4cyclictest1368697-21idleruntime-cro11:15:000
1256932993933,4cyclictest1368697-21idleruntime-cro11:15:000
1256932993932,4cyclictest1003-21mta-sts-daemon09:11:030
1256932993922,14cyclictest12650irq/32-eth012:10:570
125693299391,33cyclictest1342826-21ssh10:30:590
125693499382,7cyclictest1303308-21ssh09:26:002
125693499381,9cyclictest1381882-21ntpq11:35:572
125693499381,7cyclictest1258911-21/usr/sbin/munin07:15:492
1256934993817,18cyclictest459389-21cups-browsed08:09:592
125693499381,13cyclictest1292886-21users09:06:112
125693499381,12cyclictest1415980-21ssh12:32:122
1256933993826,9cyclictest1312473-21ntp_kernel_pll_09:41:021
1256933993826,9cyclictest1286111-21latency08:45:551
1256932993832,4cyclictest1291421-21cron09:05:010
1256932993831,4cyclictest1282492-21latency_hist08:35:020
1256932993824,7cyclictest171rcu_preempt11:35:560
1256932993824,11cyclictest1407816-21munin-run12:20:010
1256932993824,11cyclictest1386754-21cron11:45:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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