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2026-07-07 - 01:31

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #b, 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.

Note that this system runs a non-RT kernel.
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 50 highest latencies:
System rackbslot7s.osadl.org (updated Mon Jul 06, 2026 12:43:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
79652132769,13251sleep24876-21kworker/u8:011:04:552
79652132769,13251sleep24876-21kworker/u8:011:04:552
3182921036621,10300sleep127179-21kworker/1:108:54:421
3182921036621,10300sleep127179-21kworker/1:108:54:421
261442173114,1703sleep326126-21apt-get10:19:333
261442173114,1703sleep326126-21apt-get10:19:333
189252122317,1189sleep018916-21apt-get08:14:300
26143298217,943sleep24876-21kworker/u8:010:19:322
26143298217,943sleep24876-21kworker/u8:010:19:322
1636925737,532sleep116410-21ntpq11:29:381
16272249527,431sleep116302-21unin-run09:49:141
13468249310,466sleep032679-1kworker/0:0H09:39:440
408423886,370sleep14095-21fschecks_count12:34:321
21899235544,207sleep122044-21unixbench_multi10:04:451
1944223317,286sleep119585-21latency_hist09:59:151
9718232937,174sleep10-21swapper/107:44:341
6640232316,291sleep36681-21ntpq07:34:393
26343231926,260sleep1364-21snmpd12:01:001
2958231710,293sleep12423-21/usr/sbin/munin12:29:481
3203023050,17sleep130275-21cyclictest07:14:161
15155227141,123sleep115302-21unixbench_singl11:24:461
412122649,240sleep14200-21systemctl09:09:441
2903722547,235sleep128642-21/usr/sbin/munin12:09:361
14649225442,197sleep114693-21ntp_kernel_pll_07:59:371
19747223310,204sleep119774-21fschecks_count09:59:321
16938223128,191sleep116975-21ntpq09:49:381
6597223078,138sleep16637-21processes10:59:411
1892622049,158sleep118997-21/usr/sbin/munin08:14:311
23307219517,162sleep123310-21cron08:29:131
31257218435,99sleep131319-21uname10:34:411
14530218111,12sleep00-21swapper/011:24:320
21826217912,149sleep021896-21find10:04:440
65021726,86sleep10-21swapper/112:24:141
21121216768,84sleep10-21swapper/111:44:401
18873216229,93sleep118915-21latency_hist11:39:151
24434216045,90sleep10-21swapper/111:54:461
2439621608,115sleep124421-21fschecks_count10:14:301
11417216026,95sleep111569-21latency_hist09:34:151
984321579,132sleep19909-21date09:29:151
30687214214,55sleep10-21swapper/112:14:411
3251214119,45sleep10-21swapper/109:08:271
26131213533,52sleep10-21swapper/110:19:271
26131213533,52sleep10-21swapper/110:19:271
27291213410,109sleep127317-21fschecks_time12:04:521
5371213133,79sleep15390-21apt-get09:14:241
1312213133,87sleep11360-21unin-run07:19:141
1312213133,87sleep11360-21unin-run07:19:141
423021306,112sleep00-21swapper/007:27:000
24285213015,96sleep024422-21grep08:29:450
2346921298,105sleep123481-21munin-run11:54:131
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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