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2025-11-28 - 02:09

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.

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 Fri Nov 28, 2025 00:39:42)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1819671995344,6cyclictest1851200-21systemd-run20:55:012
1819670995142,6cyclictest422-21dbus-daemon22:20:011
1819669995039,7cyclictest1954914-21awk23:20:010
1819669994935,10cyclictest0-21swapper/023:10:010
1819671994839,5cyclictest1966422-21latency_hist23:35:022
1819669994727,13cyclictest12450irq/32-eth023:34:210
1819670994638,5cyclictest1939700-21sh23:00:011
1819669994637,7cyclictest1976462-21sh23:49:120
1819669994637,7cyclictest1976462-21sh23:49:120
1819671994432,7cyclictest0-21swapper/200:39:222
1819670994435,3cyclictest0-21swapper/121:39:231
1819669994436,3cyclictest0-21swapper/023:40:020
1819669994435,2cyclictest0-21swapper/022:15:010
1819669994434,6cyclictest1859753-21cron21:15:010
1819671994336,4cyclictest1935905-21grep22:55:012
1819670994334,6cyclictest1943511-21latency_hist23:05:021
1819669994330,5cyclictest453-21systemd-logind19:35:030
1819671994235,5cyclictest351ktimers/200:20:092
1819671994235,5cyclictest351ktimers/200:20:092
1819670994234,5cyclictest4168385-21cups-browsed21:10:121
1819670994234,5cyclictest2009180-21sh00:34:371
1819670994234,5cyclictest2009180-21sh00:34:371
1819670994234,5cyclictest1928398-21ssh22:45:021
1819669994234,5cyclictest2012614-21latency_hist00:40:020
181966999422,32cyclictest151ktimers/021:44:150
181967199414,27cyclictest1885573-21ssh21:49:222
1819671994132,6cyclictest1997655-21aten_r2power_cu00:19:062
1819670994135,3cyclictest0-21swapper/123:10:011
1819670994133,5cyclictest2002747-21latency_hist00:25:011
1819670994133,5cyclictest2002747-21latency_hist00:25:011
1819670994133,5cyclictest1984972-21sh00:00:011
1819670994133,5cyclictest1855692-21diskmemload22:49:241
1819670994133,5cyclictest1846680-21cron20:40:011
1819670994133,5cyclictest1839756-21fschecks_time20:19:091
1819670994133,5cyclictest1830194-21latency_hist19:45:021
1819670994126,10cyclictest1969022-21latency23:39:101
1819670994033,4cyclictest1828640-21cron19:40:011
1819669994033,4cyclictest1984975-21ssh00:00:010
1819671993931,5cyclictest1950710-21sed23:14:282
1819671993929,8cyclictest1821165-21sh19:15:012
1819671993929,6cyclictest1923953-21mailstats22:39:292
1819671993925,10cyclictest1994621-21latency00:14:122
181967099393,32cyclictest1917013-21sh22:30:011
181967199383,29cyclictest4168385-21cups-browsed19:54:162
1819671993829,6cyclictest4168385-21cups-browsed22:24:322
1819671993829,5cyclictest1930800-21fschecks_time22:49:102
1819671993829,4cyclictest0-21swapper/223:04:212
181967199382,30cyclictest1900774-21ssh22:09:202
181967199382,27cyclictest1976733-21ssh23:49:172
181967199382,27cyclictest1976733-21ssh23:49:172
181967099384,28cyclictest1957935-21ssh23:24:211
1819670993831,4cyclictest1890294-21latency_hist21:55:031
1819670993830,5cyclictest1935628-21head22:54:281
181967099380,11cyclictest28-21ksoftirqd/119:29:161
1819669993830,5cyclictest422-21dbus-daemon00:31:030
1819669993830,5cyclictest422-21dbus-daemon00:31:030
1819669993830,5cyclictest1939083-21mailstats22:59:260
1819669993830,4cyclictest0-21swapper/022:46:570
1819669993829,4cyclictest0-21swapper/000:24:180
1819669993829,4cyclictest0-21swapper/000:24:180
1819671993729,5cyclictest1984982-21munin-run00:00:012
1819671993729,5cyclictest1845226-21latency_hist20:35:022
1819671993726,7cyclictest1961354-21/usr/sbin/munin23:29:122
1819670993730,4cyclictest1924593-21ssh22:40:011
1819670993730,4cyclictest1869008-21kworker/u8:3-rpciod21:47:271
1819670993729,5cyclictest1849695-21munin-plugin-st20:50:011
1819670993729,4cyclictest0-21swapper/121:19:151
1819670993728,6cyclictest4168358-21cupsd23:33:471
1819670993727,6cyclictest4168358-21cupsd23:12:501
1819670993726,8cyclictest1977065-21switchtime23:49:271
1819670993726,8cyclictest1977065-21switchtime23:49:271
181967099370,13cyclictest1852121-21ntpq20:59:171
1819669993730,4cyclictest151ktimers/019:49:110
1819669993729,5cyclictest1985041-21cups-browsed00:29:250
1819669993729,5cyclictest1985041-21cups-browsed00:29:250
1819669993729,5cyclictest1-21systemd00:20:020
1819669993728,5cyclictest4168385-21cups-browsed22:17:460
1819669993722,11cyclictest0-21swapper/023:25:020
1819671993628,5cyclictest421-21avahi-daemon21:35:322
1819671993628,5cyclictest1834611-21head19:59:262
1819671993628,4cyclictest0-21swapper/200:29:062
1819671993628,4cyclictest0-21swapper/200:29:062
181967099364,11cyclictest28-21ksoftirqd/123:29:171
1819670993628,5cyclictest1893991-21munin-plugin-st22:00:011
1819670993628,5cyclictest1893991-21munin-plugin-st22:00:011
1819670993627,6cyclictest1833164-21true19:55:011
1819670993626,7cyclictest1988047-21mailstats00:04:281
1819670993625,8cyclictest1881451-21missed_timers21:44:121
1819670993614,5cyclictest28-21ksoftirqd/122:24:211
181966999363,24cyclictest1995032-21ssh00:14:240
1819669993628,5cyclictest266-21systemd-journal19:45:010
1819669993625,8cyclictest0-21swapper/023:54:110
1819671993528,4cyclictest0-21swapper/221:45:012
1819671993526,6cyclictest1907979-21/usr/sbin/munin22:19:082
1819671993526,4cyclictest0-21swapper/221:24:142
1819671993525,7cyclictest698-21cron20:50:012
1819669993526,5cyclictest151ktimers/023:44:200
181966999352,28cyclictest1927437-21ssh22:44:160
1819671993426,5cyclictest1893992-21sendmail22:00:022
1819671993426,5cyclictest1893992-21sendmail22:00:022
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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