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2025-11-08 - 13:17

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 Nov 08, 2025 00:44:09)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2367221410,3sleep022869-21/usr/sbin/munin23:23:450
2367221410,3sleep022869-21/usr/sbin/munin23:23:450
9902870,2chrt0-21swapper/322:23:463
149802870,3sleep30-21swapper/323:03:223
149802870,3sleep30-21swapper/323:03:223
149802870,3sleep30-21swapper/323:03:223
59712850,2chrt0-21swapper/100:03:381
59712850,2chrt0-21swapper/100:03:381
269732840,2sleep00-21swapper/020:43:300
99372830,2sleep30-21swapper/300:13:413
99372830,2sleep30-21swapper/300:13:413
47442690,2sleep04764-21gzip21:08:390
308252690,3chrt0-21swapper/320:53:303
308252690,3chrt0-21swapper/320:53:303
76602680,2sleep17847-21head00:08:371
76602680,2sleep17847-21head00:08:371
294162680,3sleep30-21swapper/322:13:413
37572660,1chrt3758-21latency_hist22:33:280
37572660,1chrt3758-21latency_hist22:33:280
148392650,1chrt0-21swapper/320:08:473
50202630,2sleep0201rcuc/023:58:500
50202630,2sleep0201rcuc/023:58:500
254322610,2chrt0-21swapper/323:28:423
254322610,2chrt0-21swapper/323:28:423
59102590,2chrt0-21swapper/019:48:220
216762570,2sleep30-21swapper/320:28:373
216762570,2sleep30-21swapper/320:28:373
138622540,2sleep30-21swapper/321:33:373
138622540,2sleep30-21swapper/321:33:373
2522399512,32cyclictest11696-21taskset21:28:342
2522399512,32cyclictest11696-21taskset21:28:342
201292510,4sleep30-21swapper/323:13:483
201292510,4sleep30-21swapper/323:13:483
25222995036,7cyclictest0-21swapper/120:48:341
25222995036,7cyclictest0-21swapper/120:48:341
182932500,3chrt0-21swapper/320:18:443
127022500,3sleep30-21swapper/322:53:493
17962490,3sleep30-21swapper/323:53:313
17962490,3sleep30-21swapper/323:53:313
95782480,3sleep0171ktimers/000:13:390
95782480,3sleep0171ktimers/000:13:390
304202480,2sleep10-21swapper/123:43:331
304202480,2sleep10-21swapper/123:43:331
28502470,5sleep01864-21/usr/sbin/munin23:53:480
28502470,5sleep01864-21/usr/sbin/munin23:53:480
149102470,3sleep30-21swapper/300:28:253
149102470,3sleep30-21swapper/300:28:253
2522399463,28cyclictest458-21chrt19:33:332
2522399463,28cyclictest458-21chrt19:33:332
254232450,3sleep20-21swapper/223:28:412
254232450,3sleep20-21swapper/223:28:412
2522399453,27cyclictest3767-21chrt23:58:362
2522399453,27cyclictest3767-21chrt23:58:362
131322450,3sleep30-21swapper/300:23:293
131322450,3sleep30-21swapper/300:23:293
2522299431,37cyclictest394-21snmpd20:28:331
2522299431,37cyclictest394-21snmpd20:28:331
181392430,2sleep118142-21unixbench_multi00:33:491
181392430,2sleep118142-21unixbench_multi00:33:491
171712430,2chrt0-21swapper/300:33:393
171712430,2chrt0-21swapper/300:33:393
2522299380,29cyclictest5772-21cat22:38:311
25221993721,8cyclictest55150irq/47-eth000:23:350
25221993721,8cyclictest55150irq/47-eth000:23:350
270882360,3sleep20-21swapper/220:43:362
270882360,3sleep20-21swapper/220:43:362
2522399362,21cyclictest17555-21chrt20:18:352
216342360,2sleep00-21swapper/023:18:420
122972350,2sleep024788-21kworker/u9:2+xprtiod22:53:460
100552350,2sleep20-21swapper/219:58:372
100552350,2sleep20-21swapper/219:58:372
292602330,2sleep20-21swapper/220:48:382
292602330,2sleep20-21swapper/220:48:382
25221993320,11cyclictest0-21swapper/020:58:350
25221993320,11cyclictest0-21swapper/020:58:350
2522499323,22cyclictest30888-21chrt20:53:343
2522499323,22cyclictest30888-21chrt20:53:343
25222993226,4cyclictest14502-21ntp_kernel_pll_20:08:441
203822320,1sleep120523-21/usr/sbin/munin20:23:461
203822320,1sleep120523-21/usr/sbin/munin20:23:461
294112310,3sleep029414-21mailstats23:38:440
25222993126,3cyclictest8194-21gltestperf21:18:381
25222993126,3cyclictest8194-21gltestperf21:18:381
25222993125,3cyclictest0-21swapper/121:33:341
25222993122,7cyclictest13511-21fschecks_time22:58:371
25222993122,7cyclictest13511-21fschecks_time22:58:371
25222993122,7cyclictest13511-21fschecks_time22:58:371
25221993125,4cyclictest16236-21needreboot21:38:440
25221993125,4cyclictest16236-21needreboot21:38:440
25221993124,5cyclictest10562-21threads22:48:500
2522399302,21cyclictest4116-21taskset21:08:322
25221993025,3cyclictest0-21swapper/020:08:480
25221993024,5cyclictest28010-21threads20:43:470
25221993024,5cyclictest28010-21threads20:43:470
25221993024,5cyclictest14893-21kworker/u9:1+xprtiod00:38:320
25221993024,5cyclictest14893-21kworker/u9:1+xprtiod00:38:320
25221993024,4cyclictest9554-21latency_hist21:23:220
25221993024,4cyclictest9554-21latency_hist21:23:220
25221993023,5cyclictest20545-21sshd23:16:060
25221993023,5cyclictest20545-21sshd23:16:060
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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