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OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, slot #2

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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ARM Broadcom BCM2711 @1500 MHz, Linux 5.10.52-rt47-v7l (Profile)

Latency plot of shadow in rack #7, slot #2
Data to construct the above plot have been generated using the RT test utility cyclictest.

Command line: cyclictest -l100000000 -m -Sp99 -i200 -h400 -q
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 rack7slot2s.osadl.org (updated Mon Jul 11, 2022 18:45:05)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
307021450,3sleep30-21swapper/317:25:503
686121430,3sleep30-21swapper/317:41:213
3237721380,3sleep30-21swapper/317:16:493
435121250,2sleep30-21swapper/317:27:273
2285321140,3sleep10-21swapper/118:17:001
310021110,3sleep00-21swapper/017:25:550
59772850,2sleep10-21swapper/117:32:551
59762830,3sleep00-21swapper/017:32:540
2909299781,73cyclictest0-21swapper/218:01:512
267772750,2sleep00-21swapper/017:37:290
2909299731,69cyclictest0-21swapper/217:28:232
2909299731,68cyclictest12489-21wc17:41:312
2909299731,3cyclictest0-21swapper/217:25:222
2909299721,5cyclictest5108-21fschecks_count17:31:542
2909299721,3cyclictest20023-21irqstats18:06:562
2909199711,51cyclictest14894-21irqstats17:47:011
2909299701,65cyclictest0-21swapper/218:19:112
2909299701,4cyclictest24331-21diskstats18:21:522
2909299701,3cyclictest28858-21diskstats18:36:542
2909299700,3cyclictest600-21ntp_states17:16:582
2909299700,3cyclictest26278-21nfs_client18:26:582
2909299691,6cyclictest27799-21tr18:32:002
2909299681,3cyclictest0-21swapper/217:48:372
2909299680,2cyclictest0-21swapper/217:51:542
45482670,9sleep121-21ksoftirqd/117:29:421
2909299671,3cyclictest29818-21/usr/sbin/munin17:06:592
2909299671,2cyclictest0-21swapper/218:11:502
2909299671,2cyclictest0-21swapper/217:13:222
2909299671,2cyclictest0-21swapper/217:13:222
23852670,5sleep12384-21ntp_kernel_err17:21:581
2909299651,3cyclictest0-21swapper/217:56:512
2909299650,2cyclictest0-21swapper/217:42:012
2909199651,26cyclictest6449-21spawn17:36:511
2909199650,35cyclictest17760-21taskset17:59:481
289912652,22sleep00-21swapper/017:06:350
294212640,2sleep129527-21timerandwakeup18:37:021
2909099621,19cyclictest14534-21apt-get17:46:550
2909099600,35cyclictest4575-21fstime17:30:330
2909399591,53cyclictest30057-21latency_hist18:41:383
2909399581,54cyclictest5082-21df_inode17:31:533
2909099581,52cyclictest30178-21taskset17:07:030
2909399571,11cyclictest27086-21cat18:31:393
2909199571,52cyclictest32522-21uname17:16:541
2909199571,41cyclictest32219-21latency_hist17:16:391
2909199571,41cyclictest32219-21latency_hist17:16:391
29093995650,4cyclictest32064-21latency_hist17:16:393
29093995650,4cyclictest32064-21latency_hist17:16:393
2909399561,50cyclictest687-21runrttasks18:02:033
2909199561,36cyclictest30075-21sed17:07:021
2909199551,35cyclictest20554-21/usr/sbin/munin18:07:021
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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