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2023-01-31 - 10:49

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 highest latencies:
System rackbslot7s (updated Tue Jan 31, 2023 00:43:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
6102279647,426sleep06250-21unixbench_singl21:12:430
834426137,594sleep08380-21ntpq19:37:400
2650241512,387sleep02693-21ntpq21:02:380
4915232612,219sleep05005-21grep19:27:310
6762228515,256sleep36798-21ntpq19:32:383
9876223512,210sleep09767-21latency_hist21:27:080
1243223128,30sleep20-21swapper/220:57:402
27821221232,165sleep027884-21mailstats22:22:430
1883222108,185sleep018907-21mailstats23:37:470
1883222108,185sleep018907-21mailstats23:37:470
1430122107,190sleep014314-21basename19:57:220
3041722085,190sleep00-21swapper/020:47:370
2500921978,176sleep024610-21/usr/sbin/munin23:57:410
784217814,143sleep0886-21fschecks_time20:57:290
3097621785,24sleep00-21swapper/022:32:360
3097621785,24sleep00-21swapper/022:32:360
12291217811,147sleep012318-21awk19:52:050
27450217411,139sleep00-21swapper/000:07:060
475217210,140sleep00-21swapper/000:22:360
475217210,140sleep00-21swapper/000:22:360
18290217112,145sleep318339-21grep21:52:353
13531217114,134sleep00-21swapper/021:37:420
3415217014,18sleep00-21swapper/022:47:420
13917216815,140sleep113974-21latency23:22:341
13917216815,140sleep113974-21latency23:22:341
4858216414,52sleep00-21swapper/022:52:420
2525421645,14sleep030236-21cyclictest22:14:280
18755216217,22sleep00-21swapper/020:12:080
840321605,14sleep00-21swapper/023:03:440
27082216013,129sleep027131-21latency_hist22:22:060
18157215414,18sleep00-21swapper/021:52:320
1643821538,10sleep00-21swapper/023:31:580
1643821538,10sleep00-21swapper/023:31:580
5107215117,89sleep00-21swapper/021:12:070
3044221505,27sleep00-21swapper/000:14:370
3044221505,27sleep00-21swapper/000:14:370
172621497,19sleep01720-21apt-get19:17:250
2043421445,18sleep00-21swapper/021:58:210
22465214314,118sleep00-21swapper/023:49:300
796421415,124sleep00-21swapper/021:19:050
22461214110,119sleep022496-21latency20:22:340
22461214110,119sleep022496-21latency20:22:340
1597821405,28sleep00-21swapper/021:46:100
1459214010,115sleep11538-21cat22:42:341
1459214010,115sleep11538-21cat22:42:341
24379213919,100sleep324253-40mandb23:57:083
24379213919,100sleep324253-40mandb23:57:083
2210521397,120sleep00-21swapper/022:03:500
242821386,120sleep00-21swapper/022:46:570
242821386,120sleep00-21swapper/022:46:570
754221375,11sleep00-21swapper/019:36:070
1468621375,121sleep00-21swapper/023:24:230
1468621375,121sleep00-21swapper/023:24:230
122521375,120sleep00-21swapper/019:15:520
30844213412,19sleep00-21swapper/019:07:320
10264213330,30sleep30-21swapper/323:12:073
10264213330,30sleep30-21swapper/323:12:073
1174621325,116sleep00-21swapper/023:16:440
2883521316,38sleep00-21swapper/000:09:080
1383221316,39sleep00-21swapper/019:55:570
2807521306,112sleep00-21swapper/020:40:540
2807521306,112sleep00-21swapper/020:40:540
2425021308,112sleep024284-21ps20:27:380
2425021308,112sleep024284-21ps20:27:380
2395421305,113sleep00-21swapper/023:53:460
2395421305,113sleep00-21swapper/023:53:460
1321721305,35sleep00-21swapper/023:20:230
12287212710,94sleep00-21swapper/021:32:420
20730212634,29sleep00-21swapper/020:17:450
20730212634,29sleep00-21swapper/020:17:450
31711212421,84sleep331853-21grep00:17:513
31711212421,84sleep331853-21grep00:17:513
3002221246,106sleep00-21swapper/022:29:370
11087212416,91sleep111161-21wc23:12:411
9461212113,96sleep00-21swapper/019:42:200
708921216,104sleep00-21swapper/023:01:420
327221208,16sleep00-21swapper/019:22:260
2306021178,15sleep023092-21ntpq22:07:410
2306021178,15sleep023092-21ntpq22:07:410
3209621169,42sleep00-21swapper/022:37:280
3209621169,42sleep00-21swapper/022:37:280
25457211518,82sleep325507-21sendmail22:17:053
3190621148,16sleep0369-21snmpd00:18:120
3190621148,16sleep0369-21snmpd00:18:120
28966211438,51sleep128981-21cut19:02:291
28966211438,51sleep128981-21cut19:02:291
15953211413,68sleep00-21swapper/020:02:270
2864321135,21sleep00-21swapper/020:42:320
2864321135,21sleep00-21swapper/020:42:320
2036321136,30sleep00-21swapper/023:42:480
2036321136,30sleep00-21swapper/023:42:480
771211218,75sleep3910-21unixbench_singl19:12:443
1694721128,90sleep017022-21awk21:47:390
2564921100,6sleep20-21swapper/222:17:072
21064211018,73sleep120741-21apt-get22:02:131
19957211083,13sleep00-21swapper/020:13:330
3201421096,12sleep00-21swapper/020:52:370
1674521088,35sleep00-21swapper/023:32:260
1674521088,35sleep00-21swapper/023:32:260
892321077,13sleep00-21swapper/023:07:110
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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