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2022-07-07 - 13:41

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 Thu Jul 07, 2022 00:43:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
403277421,735sleep2515-21/usr/sbin/munin19:40:002
2038825596,542sleep020430-21ntpq20:44:520
521324816,462sleep05224-21ntpq21:39:530
29118247911,450sleep029167-21fschecks_time19:29:480
2326623426,326sleep0369-21snmpd19:11:580
2326623426,326sleep0369-21snmpd19:11:580
25991231947,196sleep026071-21xargs00:29:560
18813225448,150sleep01-21systemd00:09:280
2838221728,46sleep02880-21cpu19:49:430
337722069,182sleep03408-21ls21:34:480
30609220322,163sleep330632-21idleruntime-cro21:19:283
30609220322,163sleep330632-21idleruntime-cro21:19:283
2624121998,39sleep00-21swapper/021:04:430
15340219815,122sleep00-21swapper/020:29:450
23724219610,93sleep00-21swapper/020:54:580
11062219610,107sleep00-21swapper/020:14:550
11062219610,107sleep00-21swapper/020:14:550
23871217740,25sleep00-21swapper/022:39:500
9139217662,83sleep00-21swapper/020:09:460
5636217441,59sleep05660-21munin-run19:59:280
5636217441,59sleep05660-21munin-run19:59:280
1504217431,53sleep00-21swapper/019:44:500
1504217431,53sleep00-21swapper/019:44:500
6331217132,22sleep00-21swapper/023:29:300
19722217035,96sleep019749-21modprobe20:44:270
19254217014,139sleep119268-21fschecks_count00:09:451
19254217014,139sleep119268-21fschecks_count00:09:451
17107217030,102sleep017204-21awk20:34:500
1085821709,126sleep010988-21cat21:59:320
1085821709,126sleep010988-21cat21:59:320
24037216813,140sleep124100-21swap22:39:551
4785216735,82sleep00-21swapper/023:24:290
4785216735,82sleep00-21swapper/023:24:290
2876921649,129sleep028878-21timerwakeupswit22:54:570
2309221586,28sleep00-21swapper/022:38:170
6635215716,118sleep36780-21sed20:00:003
1393521579,55sleep00-21swapper/020:24:490
14997215679,25sleep00-21swapper/023:54:580
13046215211,123sleep00-21swapper/023:49:490
26191214918,119sleep00-21swapper/022:48:020
26191214918,119sleep00-21swapper/022:48:020
1628021447,37sleep00-21swapper/023:59:550
25110214336,24sleep00-21swapper/000:29:270
3050721425,33sleep00-21swapper/021:18:080
3050721425,33sleep00-21swapper/021:18:080
23563213919,85sleep00-21swapper/000:24:260
598213731,94sleep0693-21sed21:24:580
2529921355,32sleep00-21swapper/019:16:470
24613213311,107sleep124657-21ntpq19:14:541
18410213314,103sleep218086-21apt-get20:39:332
867721275,28sleep00-21swapper/020:08:210
7836212621,23sleep00-21swapper/021:49:380
11521212615,56sleep00-21swapper/021:59:560
11521212615,56sleep00-21swapper/021:59:560
30515212528,46sleep20-21swapper/219:34:382
13331212532,77sleep00-21swapper/020:23:070
13331212532,77sleep00-21swapper/020:23:070
10062212569,41sleep00-21swapper/023:39:520
21320212331,78sleep021399-21wc00:14:570
277721226,28sleep00-21swapper/021:32:460
277721226,28sleep00-21swapper/021:32:460
22091211917,74sleep30-21swapper/320:49:563
19171211916,83sleep219234-21/usr/sbin/munin00:09:422
19171211916,83sleep219234-21/usr/sbin/munin00:09:422
1811821170,10sleep30-21swapper/300:04:583
21651211624,69sleep221741-21fschecks_time20:49:472
32182211529,55sleep0369-21snmpd23:05:110
23603211322,73sleep323739-21sed19:14:323
23603211322,73sleep323739-21sed19:14:323
13809211311,32sleep00-21swapper/022:08:400
1980421126,11sleep00-21swapper/022:25:530
17550211219,74sleep217631-21latency22:19:492
25138211120,70sleep325232-21fschecks_time22:44:463
25138211120,70sleep325232-21fschecks_time22:44:463
24071211114,80sleep224149-21vmstat19:14:392
1053211129,55sleep11178-21latency_hist19:44:311
26057211014,14sleep00-21swapper/021:04:310
7640210916,82sleep00-21swapper/023:32:040
21042210628,16sleep00-21swapper/022:29:570
14184210613,75sleep214191-21/usr/sbin/munin20:24:552
32197210522,17sleep00-21swapper/019:39:410
1929421057,60sleep019371-21cut00:09:480
1929421057,60sleep019371-21cut00:09:480
17782210527,17sleep00-21swapper/022:19:550
11232210518,17sleep00-21swapper/023:44:400
27795210418,17sleep00-21swapper/021:09:400
21555210423,39sleep00-21swapper/020:49:410
20096210411,77sleep320142-21fschecks_count20:44:473
12378210412,78sleep312509-21latency_hist22:04:313
12378210412,78sleep312509-21latency_hist22:04:313
11862210418,70sleep111924-21modprobe20:19:281
11862210418,70sleep111924-21modprobe20:19:281
864210324,43sleep0944-21mailstats23:09:550
27647210219,72sleep00-21swapper/022:51:540
3119221018,17sleep00-21swapper/021:19:490
3119221018,17sleep00-21swapper/021:19:490
3053921016,48sleep00-21swapper/019:34:400
21104210135,32sleep10-21swapper/119:04:571
2012521010,8sleep10-21swapper/122:29:281
1508321015,11sleep00-21swapper/022:10:100
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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