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2025-12-08 - 02:46

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 - 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.

Note that this system runs a non-RT kernel.
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 rackbslot7s.osadl.org (updated Sun Dec 07, 2025 12:43:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
25893225349,2509sleep014365-21kworker/u8:111:58:060
25893225349,2509sleep014365-21kworker/u8:111:58:060
21990267116,638sleep222050-21/usr/sbin/munin10:03:052
20727254115,511sleep320760-21/usr/sbin/munin09:58:133
4890234910,324sleep14760-21latency_hist10:52:481
31611230914,204sleep131691-21fschecks_time07:08:081
22174229411,89sleep10-21swapper/110:03:081
3125622900,14sleep129357-21cyclictest08:48:151
24196227633,195sleep124345-21grep10:08:171
22459227063,159sleep122433-21grep08:22:471
22459227063,159sleep122433-21grep08:22:471
20231226085,95sleep10-21swapper/108:13:391
28909225451,187sleep128929-21latency_hist08:42:471
15972225140,159sleep116022-21latency_hist08:02:481
101422286,212sleep15666-21snmpd08:56:281
9147222010,192sleep19165-21modprobe09:22:451
16584221676,97sleep10-21swapper/111:28:181
28905219012,160sleep00-21swapper/012:07:590
1161721897,139sleep111673-21fschecks_count07:48:061
20108218837,23sleep10-21swapper/109:57:471
11478218642,52sleep10-21swapper/109:28:191
11478218642,52sleep10-21swapper/109:28:191
6945217310,151sleep16959-21grep10:58:091
32745217318,134sleep2444-21unixbench_multi12:18:192
20637217329,98sleep120744-21latency_hist11:42:481
20637217329,98sleep120744-21latency_hist11:42:481
15427216713,112sleep015546-21latency_hist09:42:470
10549216516,59sleep10-21swapper/111:08:191
5009216456,59sleep14487-21/usr/sbin/munin09:08:151
27537216114,131sleep027567-21idleruntime12:03:060
27537216114,131sleep027567-21idleruntime12:03:060
3753216036,65sleep10-21swapper/107:23:021
3753216036,65sleep10-21swapper/107:23:021
707221559,94sleep10-21swapper/109:13:361
3087121539,102sleep130953-21latency_hist07:07:471
3087121539,102sleep130953-21latency_hist07:07:471
23643215211,126sleep223429-21/usr/sbin/munin10:08:062
30478215062,50sleep130450-21latency_hist08:47:481
30478215062,50sleep130450-21latency_hist08:47:481
2697921489,102sleep126994-21awk08:33:341
2697921489,102sleep126994-21awk08:33:341
1249321465,130sleep00-21swapper/007:48:540
32660214544,55sleep10-21swapper/112:18:181
842821439,37sleep10-21swapper/107:38:001
4041213927,100sleep14143-21latency_hist12:32:481
32055213914,110sleep031997-21latency_hist08:52:470
1458821388,87sleep10-21swapper/109:38:161
850421379,114sleep38601-21timerandwakeup09:18:193
3096821377,95sleep131002-21ps12:13:171
29617213710,114sleep329628-21ntpq08:43:133
29617213710,114sleep329628-21ntpq08:43:133
31069213617,105sleep030973-21latency_hist10:32:480
25275213641,79sleep125292-21munin-run11:57:461
16618213635,88sleep116667-21/usr/sbin/munin08:03:131
12649213631,21sleep10-21swapper/109:33:031
12649213631,21sleep10-21swapper/109:33:031
2889021356,11sleep20-21swapper/206:58:202
3124921347,92sleep131269-21apt-get10:32:571
30804213317,104sleep230829-21grep08:48:052
11517213330,76sleep311536-21apt-get11:12:573
9979213224,58sleep10-21swapper/107:43:011
9979213224,58sleep10-21swapper/107:43:011
887721328,89sleep18911-21ps11:03:221
103521318,33sleep10-21swapper/107:13:121
103521318,33sleep10-21swapper/107:13:121
866212929,86sleep1951-21cut10:38:181
25648212716,96sleep225724-21timerandwakeup10:13:192
25648212716,96sleep225724-21timerandwakeup10:13:192
21144212718,91sleep321163-21cpu08:18:053
21144212718,91sleep321163-21cpu08:18:053
27899212630,23sleep127997-21date10:22:471
27899212630,23sleep127997-21date10:22:471
20628212526,76sleep10-21swapper/109:58:111
14722212517,87sleep314797-21threads09:38:183
1126212127,67sleep01145-21apt-get12:22:570
24960212010,23sleep10-21swapper/108:28:251
24960212010,23sleep10-21swapper/108:28:251
1434721186,103sleep00-21swapper/011:22:400
3232211628,49sleep13283-21ls10:47:471
30094211511,90sleep130130-21ntpq10:28:121
18487211512,90sleep118551-21unin-run09:52:461
2726211320,70sleep30-21swapper/309:02:483
20039211322,65sleep320183-21grep11:38:183
20039211322,65sleep320183-21grep11:38:183
12051211315,55sleep10-21swapper/111:13:161
24458211116,83sleep00-21swapper/010:09:250
19803211116,71sleep00-21swapper/011:38:150
19803211116,71sleep00-21swapper/011:38:150
9684211015,81sleep29712-21basename07:42:462
28692211031,41sleep10-21swapper/110:23:161
28692211031,41sleep10-21swapper/110:23:161
22549211022,63sleep222426-21latency_hist08:22:482
22549211022,63sleep222426-21latency_hist08:22:482
29783210921,66sleep329800-21fschecks_count10:28:063
28623210916,19sleep00-21swapper/010:23:150
28623210916,19sleep00-21swapper/010:23:150
2124821099,64sleep121284-21ntpq11:43:121
13293210810,57sleep113352-21if_eth011:18:081
11736210722,68sleep011881-21unixbench_singl09:28:220
11736210722,68sleep011881-21unixbench_singl09:28:220
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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