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2026-08-14 - 14:05

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 Fri Aug 14, 2026 00:43:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
26131296210,937sleep015311-21kworker/0:121:12:120
525026079,579sleep35307-21/usr/sbin/munin23:30:133
11507254911,524sleep111538-21awk22:09:511
23015239512,370sleep123036-21dpkg19:20:031
13342227129,30sleep10-21swapper/122:15:041
1686224787,33sleep11689-21modprobe19:55:041
23284224059,164sleep123404-21latency_hist21:04:541
27013221212,49sleep10-21swapper/122:55:221
29531220711,178sleep129618-21latency19:40:141
32444219815,49sleep132511-21fschecks_time19:50:111
15378219717,47sleep115479-21timerandwakeup00:01:571
21695219612,168sleep221682-21apt-get22:40:092
5189219145,38sleep10-21swapper/120:05:141
5189219145,38sleep10-21swapper/120:05:141
14067219153,52sleep114104-21cron23:59:511
23987218311,161sleep124001-21awk21:05:221
29022218117,145sleep129150-21latency_hist19:39:541
29022218117,145sleep129150-21latency_hist19:39:541
3575218010,149sleep13607-21fschecks_count23:25:101
23337217912,57sleep123434-21fschecks_time22:45:121
22943217514,16sleep10-21swapper/100:25:151
22943217514,16sleep10-21swapper/100:25:151
11266216914,102sleep10-21swapper/123:50:101
5126216311,113sleep15177-21fschecks_count23:30:111
8195216115,131sleep18230-21latency20:15:151
31448216029,24sleep10-21swapper/119:45:231
26097216015,118sleep016272-1kworker/0:0H22:54:530
26097216015,118sleep016272-1kworker/0:0H22:54:530
2599215915,120sleep10-21swapper/121:40:231
2599215915,120sleep10-21swapper/121:40:231
21133215914,129sleep121137-21cron22:39:511
21133215914,129sleep121137-21cron22:39:511
12986215813,131sleep113030-21ntp_kernel_pll_20:30:171
15731215514,127sleep115778-21grep20:40:071
6956215416,44sleep10-21swapper/123:35:161
6956215416,44sleep10-21swapper/123:35:161
3009921539,13sleep20-21swapper/221:25:182
3009921539,13sleep20-21swapper/221:25:182
3271214844,65sleep13413-21latency_hist23:24:541
4118214412,120sleep14205-21switchtime21:45:241
4799214217,102sleep04813-21apt-get21:49:510
25299214212,92sleep125381-21tr22:50:211
25299214212,92sleep125381-21tr22:50:211
18161213910,52sleep118170-21forks22:30:101
856321389,51sleep18607-21ntpq23:40:171
19228213812,51sleep119264-21ntpq20:50:161
21722213613,73sleep121768-21date20:59:531
20046213414,104sleep220119-21awk00:15:232
11666213411,111sleep311706-21tr23:50:203
24959213210,84sleep125092-21sed00:30:241
6639213111,83sleep16726-21dpkg21:54:531
1703421318,108sleep10-21swapper/122:25:221
21210212913,25sleep10-21swapper/100:20:101
30833212818,42sleep10-21swapper/121:27:231
30833212818,42sleep10-21swapper/121:27:231
11565212816,97sleep111658-21grep20:25:211
3126121279,13sleep10-21swapper/123:10:081
23506212721,26sleep20-21swapper/219:20:202
20808212774,35sleep120850-21latency_hist19:14:541
27739212511,38sleep10-21swapper/122:59:541
20663212515,96sleep220694-21latency20:55:182
24550212321,87sleep224672-21latency_hist22:49:542
779212110,98sleep3790-21netstat21:35:163
779212110,98sleep3790-21netstat21:35:163
24309212121,80sleep024350-21uniq00:30:110
950821188,71sleep10-21swapper/120:20:041
16280211813,90sleep316340-21fschecks_time00:05:143
16280211813,90sleep316340-21fschecks_time00:05:143
1305521187,79sleep113087-21munin-run22:14:521
24779211619,77sleep2231-21systemd-journal21:09:512
1617211611,93sleep00-21swapper/021:39:090
1617211611,93sleep00-21swapper/021:39:090
28511211521,76sleep328591-21awk23:00:213
11020211411,86sleep011065-21latency_hist23:49:530
5241211114,78sleep35277-21ntp_states20:05:163
5241211114,78sleep35277-21ntp_states20:05:163
12891211114,77sleep312935-21fschecks_count23:55:093
11317211113,83sleep211341-21df_inode23:50:112
9985210919,68sleep210020-21grep23:45:142
20006210912,84sleep120044-21grep00:15:221
19842210815,70sleep00-21swapper/022:35:020
19842210815,70sleep00-21swapper/022:35:020
4803210611,80sleep04913-21cat23:29:540
32054210621,69sleep332192-21sed21:30:283
32054210621,69sleep332192-21sed21:30:283
17983210615,71sleep217967-21apt-get00:10:102
21514210514,78sleep121650-21sed22:39:551
8455210414,79sleep18416-21latency_hist21:59:541
26139210410,39sleep10-21swapper/119:30:081
26139210410,39sleep10-21swapper/119:30:081
1967210314,34sleep20-21swapper/221:40:042
1967210314,34sleep20-21swapper/221:40:042
250822999,36sleep10-21swapper/121:10:071
2867429810,69sleep00-21swapper/021:20:190
251882987,15sleep30-21swapper/321:10:133
223202977,32sleep10-21swapper/119:15:271
1802529719,61sleep318170-21unixbench_singl20:45:253
1770129710,31sleep10-21swapper/120:45:191
82129617,22sleep00-21swapper/023:15:200
281442966,11sleep30-21swapper/319:35:193
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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