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2026-03-21 - 05:51

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #4, slot #1

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 rack4slot1s.osadl.org (updated Sat Mar 21, 2026 00:44:12)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
236722850,4sleep016-21ksoftirqd/021:26:520
236722850,4sleep016-21ksoftirqd/021:26:520
178652810,2chrt17869-21sed22:36:561
178652810,2chrt17869-21sed22:36:561
297902800,3sleep30-21swapper/320:16:523
297902800,3sleep30-21swapper/320:16:523
107202780,2chrt0-21swapper/320:51:543
107202780,2chrt0-21swapper/320:51:543
265522730,2sleep20-21swapper/220:06:582
265522730,2sleep20-21swapper/220:06:582
87902670,3chrt0-21swapper/323:41:463
87902670,3chrt0-21swapper/323:41:463
231802640,3chrt0-21swapper/300:19:093
231802640,3chrt0-21swapper/300:19:093
266722610,2chrt26673-21grep21:36:461
266722610,2chrt26673-21grep21:36:461
213812570,3sleep30-21swapper/319:56:343
213812570,3sleep30-21swapper/319:56:343
175742570,2sleep30-21swapper/322:36:543
175742570,2sleep30-21swapper/322:36:543
310092550,3chrt0-21swapper/300:41:403
310092550,3chrt0-21swapper/300:41:403
238802530,3chrt0-21swapper/220:01:482
238802530,3chrt0-21swapper/220:01:482
123862530,2sleep00-21swapper/023:51:450
123862530,2sleep00-21swapper/023:51:450
228832520,1chrt0-21swapper/019:57:200
228832520,1chrt0-21swapper/019:57:200
291642510,2sleep30-21swapper/300:36:413
318722500,4sleep031875-21fschecks_time23:16:470
318722500,4sleep031875-21fschecks_time23:16:470
249912480,2sleep30-21swapper/321:31:453
249912480,2sleep30-21swapper/321:31:453
166452480,2chrt16643-21sed00:01:490
166452480,2chrt16643-21sed00:01:490
57982470,4sleep05800-21mailstats23:31:540
57982470,4sleep05800-21mailstats23:31:540
517099452,36cyclictest16036-21sed00:01:400
517099452,36cyclictest16036-21sed00:01:400
517099452,36cyclictest16036-21sed00:01:400
89452440,3chrt0-21swapper/320:46:553
89452440,3chrt0-21swapper/320:46:553
5180993932,4cyclictest28978-21cron00:36:341
186592370,3sleep30-21swapper/300:06:513
186592370,3sleep30-21swapper/300:06:513
518299361,25cyclictest16038-21chrt00:01:403
518299361,25cyclictest16038-21chrt00:01:403
518299361,25cyclictest16038-21chrt00:01:403
5170993629,5cyclictest28269-21cut23:06:460
5170993629,5cyclictest28269-21cut23:06:460
5170993627,7cyclictest18351-21gltestperf00:06:480
5170993627,7cyclictest18351-21gltestperf00:06:480
5180993527,6cyclictest16265-21fschecks_count00:01:461
5180993527,6cyclictest16265-21fschecks_count00:01:461
10772350,3sleep20-21swapper/223:21:392
10772350,3sleep20-21swapper/223:21:392
518199342,23cyclictest16014-21chrt00:01:392
518199342,23cyclictest16014-21chrt00:01:392
518199342,23cyclictest16014-21chrt00:01:392
5170993328,3cyclictest90-1pr/ttyS022:39:300
5170993328,3cyclictest90-1pr/ttyS022:39:300
5170993327,5cyclictest30639-21processes23:11:520
5170993326,5cyclictest547-21rs:main0
5170993326,5cyclictest547-21rs:main0
5170993326,5cyclictest547-21rs:main0
5180993224,6cyclictest6977-21fschecks_time23:36:471
5180993224,6cyclictest6977-21fschecks_time23:36:471
5180993223,6cyclictest15744-21latency_hist19:41:341
5180993223,6cyclictest15744-21latency_hist19:41:341
518099322,25cyclictest16730-21memory00:01:501
518099322,25cyclictest16730-21memory00:01:501
5170993225,5cyclictest14426-21gltestperf19:36:470
5170993225,5cyclictest14426-21gltestperf19:36:470
247002320,2sleep30-21swapper/320:01:573
247002320,2sleep30-21swapper/320:01:573
5180993126,4cyclictest5169-21cyclictest20:46:541
5180993126,4cyclictest5169-21cyclictest20:46:541
5180993124,5cyclictest13796-21processes22:26:541
5180993124,5cyclictest13796-21processes22:26:541
517099312,4cyclictest201rcuc/021:25:280
517099312,4cyclictest201rcuc/021:25:280
5170993124,5cyclictest5169-21cyclictest23:51:070
5170993124,5cyclictest5169-21cyclictest22:04:560
5170993124,5cyclictest5169-21cyclictest22:04:560
5170993124,5cyclictest5169-21cyclictest22:04:560
74752300,3sleep30-21swapper/322:11:453
74752300,3sleep30-21swapper/322:11:453
5180993025,3cyclictest4949-21ntp_offset20:36:531
5180993025,3cyclictest4949-21ntp_offset20:36:531
5180993025,3cyclictest4949-21ntp_offset20:36:531
5180993024,3cyclictest0-21swapper/121:16:341
5180993022,6cyclictest19012-21threads00:06:561
5180993022,6cyclictest19012-21threads00:06:561
5180993021,7cyclictest3018-21needreboot20:31:511
5180993021,7cyclictest3018-21needreboot20:31:511
5180993021,7cyclictest2350-21unixbench_multi23:21:571
5180993021,7cyclictest2350-21unixbench_multi23:21:571
5180993020,8cyclictest9324-21processes19:21:531
5170993022,6cyclictest22737-21threads00:16:560
5170993022,6cyclictest22737-21threads00:16:560
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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