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2022-07-06 - 05:10

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 
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ARM Freescale i.MX6 Quad @996 MHz, Linux 5.15.26-xenomai (Profile)

Latency plot of shadow in rack #b, slot #7
Note that this system runs a non-RT kernel.
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 100, Linux 4.9.20-rt16, x86_64 highest latencies:
System rackbslot7s (updated Wed Jul 06, 2022 00:43:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
18017294598,9440sleep217098-21kworker/2:100:30:112
3748211456,1126sleep2194-21jbd2/mmcblk2p2-20:19:372
3195528987,876sleep232002-21ntpq20:04:562
24535254272,453sleep124537-21ntp_states21:24:571
2408125236,505sleep224122-21unin-run23:09:322
2682250175,407sleep22748-21fschecks_time21:59:512
7691230610,280sleep2956-21kworker/u8:423:59:462
215662292100,150sleep20-21swapper/219:30:032
31843225812,228sleep231875-21awk23:34:312
22527225717,226sleep322576-21unin-run23:04:323
17661222816,196sleep317691-21fschecks_count19:19:513
26890221332,169sleep226915-21munin-run21:34:312
3912220920,169sleep03995-21latency_hist22:04:330
31719220716,174sleep331850-21ls21:49:343
24632220154,56sleep20-21swapper/223:09:562
23844220045,21sleep20-21swapper/219:39:482
23844220045,21sleep20-21swapper/219:39:482
24056219010,165sleep224070-21find21:24:422
4236218920,60sleep20-21swapper/223:49:332
14343218912,161sleep314410-21/usr/sbin/munin00:19:583
32307218538,130sleep332346-21/usr/sbin/munin21:50:033
1888521797,156sleep219028-21date19:24:342
6655217210,147sleep26811-21date20:29:352
20466217276,81sleep220618-21latency_hist19:29:352
3204721717,154sleep2369-21snmpd21:49:532
15272216516,129sleep215329-21latency_hist19:14:332
27949216411,134sleep227467-21/usr/sbin/munin23:19:572
13954216421,21sleep20-21swapper/222:34:592
18457215911,76sleep118606-21sed00:34:341
857215117,95sleep20-21swapper/220:09:522
31641215118,114sleep131721-21tune2fs20:04:511
3054621498,103sleep230615-21switchtime19:59:592
23757214816,116sleep123761-21apt-key21:24:331
23757214816,116sleep123761-21apt-key21:24:331
2664621477,124sleep226790-21latency_hist19:49:332
2664621477,124sleep226790-21latency_hist19:49:332
30480214611,122sleep130542-21sendmail_mailst19:59:581
14637214621,86sleep20-21swapper/220:54:462
4147214517,21sleep30-21swapper/320:19:553
12020214510,11sleep00-21swapper/022:30:010
2108521426,49sleep20-21swapper/221:14:532
728121399,61sleep27318-21ntp_states20:29:552
11251213515,105sleep011288-21ps00:09:580
731221308,52sleep20-21swapper/222:14:492
8500212920,94sleep18523-21fschecks_count20:34:511
1440121289,101sleep20-21swapper/220:54:342
2408212727,81sleep20-21swapper/220:14:532
12936212514,90sleep20-21swapper/200:15:002
28853212337,20sleep20-21swapper/223:24:342
18858212323,11sleep20-21swapper/221:07:222
24450212217,80sleep324490-21fschecks_count23:09:533
1502021229,97sleep015038-21apt-get22:39:420
20381212132,63sleep320416-21grep19:29:323
7822211816,83sleep07896-21fschecks_time00:00:000
18223211718,48sleep20-21swapper/222:49:492
11987211742,20sleep20-21swapper/220:44:572
22152211611,89sleep20-21swapper/223:00:032
2068121165,12sleep20-21swapper/222:56:112
12865211620,81sleep112935-21sensors_temp00:14:591
1059821168,92sleep210723-21sed20:40:002
15647211520,12sleep20-21swapper/200:24:502
29300211412,90sleep229368-21wc21:40:002
17199211310,88sleep217318-21timerandwakeup22:45:012
17199211310,88sleep217318-21timerandwakeup22:45:012
243921125,11sleep20-21swapper/223:42:552
15648211218,50sleep20-21swapper/222:40:002
996621118,59sleep2369-21snmpd22:23:002
32635211011,84sleep2285-21dbus-daemon23:34:592
29679211021,48sleep20-21swapper/219:59:272
15318211010,43sleep20-21swapper/200:24:332
12654211023,67sleep012720-21wc19:04:540
12654211023,67sleep012720-21wc19:04:540
5024210928,44sleep20-21swapper/222:05:042
5024210928,44sleep20-21swapper/222:05:042
28189210921,18sleep10-21swapper/119:54:331
27720210710,85sleep2369-21snmpd19:50:022
12005210722,45sleep20-21swapper/222:29:592
4852210611,81sleep04896-21ntpq23:49:590
27263210514,76sleep027309-21fschecks_count21:34:490
8417210422,44sleep20-21swapper/220:34:472
17519210418,70sleep317528-21unin-run21:04:323
16233210417,65sleep116379-21unixbench_multi00:25:011
8509210318,68sleep08534-21munin-run22:19:310
506521015,12sleep10-21swapper/122:05:111
506521015,12sleep10-21swapper/122:05:111
22214210020,43sleep20-21swapper/219:34:442
1746629912,73sleep017490-21who22:45:030
1746629912,73sleep017490-21who22:45:030
103712998,51sleep20-21swapper/222:24:462
1911229810,72sleep019116-21ntpq00:34:570
1565629819,42sleep20-21swapper/219:14:372
228429718,57sleep00-21swapper/020:14:510
92942967,48sleep20-21swapper/200:04:472
92942967,48sleep20-21swapper/200:04:472
305029616,55sleep10-21swapper/121:59:581
2029329613,69sleep020396-21timerandwakeup22:55:000
1635529619,60sleep316447-21latency_hist22:44:333
259082958,46sleep20-21swapper/223:14:442
259082958,46sleep20-21swapper/223:14:442
2320429519,39sleep20-21swapper/221:20:022
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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