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2026-04-29 - 22:15

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 50 highest latencies:
System rack4slot1s.osadl.org (updated Wed Apr 29, 2026 12:44:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
247232970,1chrt24726-21fschecks_time10:02:241
247232970,1chrt24726-21fschecks_time10:02:241
74552790,2sleep17458-21grep07:47:331
74552790,2sleep17458-21grep07:47:331
41572700,2sleep04160-21grep09:07:240
41572700,2sleep04160-21grep09:07:240
134172630,4sleep013418-21fschecks_count09:32:240
230162620,3chrt0-21swapper/209:57:272
230162620,3chrt0-21swapper/209:57:272
230162620,3chrt0-21swapper/209:57:272
55482610,3chrt0-21swapper/209:12:122
55482610,3chrt0-21swapper/209:12:122
204332560,3chrt20437-21gltestperf11:17:251
204332560,3chrt20437-21gltestperf11:17:251
204332560,3chrt20437-21gltestperf11:17:251
261092510,2sleep00-21swapper/011:32:250
261092510,2sleep00-21swapper/011:32:250
185622510,2sleep018565-21mailstats12:37:320
185622510,2sleep018565-21mailstats12:37:320
39362500,3sleep20-21swapper/211:57:342
39362500,3sleep20-21swapper/211:57:342
28022500,3sleep20-21swapper/209:02:312
28022500,3sleep20-21swapper/209:02:312
21002440,3chrt0-21swapper/307:33:403
21002440,3chrt0-21swapper/307:33:403
127022440,3sleep20-21swapper/208:02:302
127022440,3sleep20-21swapper/208:02:302
82882430,3chrt0-21swapper/309:17:283
82882430,3chrt0-21swapper/309:17:283
181192420,3sleep30-21swapper/308:17:263
240002410,3sleep20-21swapper/211:27:232
316112400,2sleep031615-21switchtime08:52:320
316112400,2sleep031615-21switchtime08:52:320
307392380,2sleep20-21swapper/208:52:222
307392380,2sleep20-21swapper/208:52:222
214022370,3sleep30-21swapper/308:27:233
214022370,3sleep30-21swapper/308:27:233
262262360,5sleep026229-21grep08:37:330
262262360,5sleep026229-21grep08:37:330
25873993630,4cyclictest4323-21idleruntime-cro12:02:110
25873993630,4cyclictest4323-21idleruntime-cro12:02:110
25875993527,6cyclictest729-21dbus-daemon12:02:111
25875993527,6cyclictest729-21dbus-daemon12:02:111
25873993530,4cyclictest90-1pr/ttyS012:09:440
25873993530,4cyclictest90-1pr/ttyS012:09:440
25873993427,5cyclictest484-21threads10:22:330
25873993427,5cyclictest484-21threads10:22:330
137142340,3sleep20-21swapper/209:32:262
25875993315,5cyclictest90-1pr/ttyS011:42:231
25875993315,5cyclictest90-1pr/ttyS011:42:231
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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