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2026-09-23 - 04:54

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 Wed Sep 23, 2026 00:43:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
20100259621,556sleep320170-21/usr/sbin/munin19:22:583
9090256419,526sleep39108-21cron22:17:283
5382243333,358sleep15414-21awk23:47:271
6123231816,175sleep10-21swapper/120:22:581
19623228539,207sleep119710-21grep19:22:481
15504226972,144sleep10-21swapper/119:12:301
15604226463,160sleep115608-21acpi22:37:371
11779225128,163sleep111920-21latency_hist20:42:321
2067622426,201sleep120720-21ntpq22:52:551
9207223242,61sleep10-21swapper/120:32:511
21939223225,184sleep122029-21fschecks_time22:57:481
3318222712,192sleep13469-21head23:37:581
3318222712,192sleep13469-21head23:37:581
6202222230,179sleep16217-21kernelversion23:48:121
6202222230,179sleep16217-21kernelversion23:48:121
31736221627,61sleep10-21swapper/120:02:301
760221419,130sleep10-21swapper/123:32:291
834220549,106sleep10-21swapper/120:07:311
2532522027,161sleep124936-21/usr/sbin/munin23:07:581
13601220131,113sleep113654-21fschecks_count20:47:491
2350022009,152sleep123604-21cut23:02:491
2350022009,152sleep123604-21cut23:02:491
1672822009,130sleep116801-21switchtime19:12:591
8473219461,96sleep1231-21systemd-journal23:54:181
4204219010,66sleep14178-21/usr/sbin/munin20:17:451
12773218514,101sleep112478-21/usr/sbin/munin22:27:521
18225218116,81sleep10-21swapper/119:18:361
1946021809,33sleep10-21swapper/121:07:271
1946021809,33sleep10-21swapper/121:07:271
3016321756,133sleep129837-21apt-get23:22:311
3016321756,133sleep129837-21apt-get23:22:311
30611217338,18sleep10-21swapper/121:42:291
25990216740,90sleep126040-21latency_hist21:27:311
12169216734,97sleep112218-21if_eth020:42:521
31639216631,117sleep131774-21unixbench_singl21:43:011
13783216522,27sleep10-21swapper/100:12:471
29057216028,119sleep10-21swapper/123:18:031
19462216015,127sleep219601-21grep22:48:002
19462216015,127sleep219601-21grep22:48:002
2224215511,27sleep12373-21tail21:52:591
2224215511,27sleep12373-21tail21:52:591
3837215318,117sleep23858-21idleruntime-cro23:42:272
3837215318,117sleep23858-21idleruntime-cro23:42:272
19340215329,82sleep119461-21cat22:47:591
19340215329,82sleep119461-21cat22:47:591
2104321509,126sleep121070-21munin-run21:12:281
14823215015,120sleep014952-21awk22:32:590
1746214910,78sleep10-21swapper/120:07:591
20616214425,100sleep220764-21grep00:32:592
518921438,99sleep15231-21processes22:02:561
1121221407,74sleep10-21swapper/100:02:581
1121221407,74sleep10-21swapper/100:02:581
30495213920,95sleep330553-21cut23:23:303
30495213920,95sleep330553-21cut23:23:303
14243213913,75sleep10-21swapper/122:32:481
5416213218,100sleep25485-21apt-key23:47:282
31663213222,89sleep231790-21latency_hist23:27:292
31663213222,89sleep231790-21latency_hist23:27:292
28545213221,42sleep10-21swapper/121:33:001
17250213164,53sleep117331-21timerandwakeup20:57:591
9508213011,19sleep10-21swapper/123:57:571
9508213011,19sleep10-21swapper/123:57:571
21313212869,16sleep10-21swapper/121:12:451
21313212869,16sleep10-21swapper/121:12:451
11221212619,52sleep10-21swapper/122:22:511
20561212414,91sleep320643-21/usr/sbin/munin22:52:533
3324211817,34sleep10-21swapper/121:57:511
3324211817,34sleep10-21swapper/121:57:511
140621168,96sleep11452-21ntpq23:32:531
1564221158,40sleep10-21swapper/120:52:581
12609211433,57sleep312600-21apt-get19:02:443
6603211318,77sleep26726-21cat23:48:212
6603211318,77sleep26726-21cat23:48:212
2849211314,80sleep02938-21/usr/sbin/munin23:37:490
2849211314,80sleep02938-21/usr/sbin/munin23:37:490
1577621139,66sleep10-21swapper/100:17:561
16940211219,30sleep20-21swapper/222:42:302
31971211134,46sleep031967-21apt-get20:02:410
27438210819,27sleep10-21swapper/121:31:511
14854210821,68sleep214999-21latency_hist20:52:302
26825210710,75sleep326841-21sort23:12:483
32403210517,72sleep232482-21awk23:27:582
24442210415,75sleep324548-21latency_hist21:22:323
23991210418,51sleep10-21swapper/121:20:201
1683721036,35sleep10-21swapper/100:22:411
1683721036,35sleep10-21swapper/100:22:411
1263921029,48sleep112709-21mailstats00:07:591
1263921029,48sleep112709-21mailstats00:07:591
2884321018,32sleep10-21swapper/119:52:451
1820021017,60sleep1367-21snmpd22:44:231
2571821007,32sleep10-21swapper/119:42:391
2298429915,71sleep223009-21grep21:17:502
188012998,17sleep00-21swapper/022:47:450
188012998,17sleep00-21swapper/022:47:450
2642429816,68sleep226479-21if_eth021:27:482
211712989,70sleep221262-21/usr/sbin/munin19:27:502
1828729717,65sleep318298-21awk21:02:493
1828729717,65sleep318298-21awk21:02:493
605829515,66sleep06082-21grep23:48:070
605829515,66sleep06082-21grep23:48:070
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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