You are here: Home / Technical Services / OSADL QA Farm Real-time / 
2026-04-01 - 16:00

OSADL QA Farm on Real-time of Mainline Linux

About - Hardware - CPUs - Benchmarks - Graphics - Benchmarks - Kernels - Boards/Distros - Latency monitoring - Latency plots - System data - Profiles - Compare - Awards

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 
Special  All - All RT - Optimization - Ethernet - Thumbnails - Next
  
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 Apr 01, 2026 12:43:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
292622122998,12228sleep217445-21kworker/u8:109:13:072
126582890011,8857sleep29657-21kworker/2:008:20:242
31060223145,2297sleep027798-21kworker/0:211:01:200
1523227858,765sleep215243-21ntpq11:52:342
32242506143,343sleep23237-21fschecks_count09:32:292
23636242526,344sleep223683-21ntpq07:12:322
1315723608,343sleep1191-21jbd2/mmcblk2p2-11:47:121
247342325142,162sleep224812-21mailstats08:57:442
247342325142,162sleep224812-21mailstats08:57:442
217723240,8sleep10-21swapper/107:47:271
304062316129,56sleep230525-21timerwakeupswit07:32:432
7702307134,27sleep20-21swapper/211:07:282
199082284131,34sleep20-21swapper/208:42:382
199082284131,34sleep20-21swapper/208:42:382
22168226219,219sleep322217-21latency_hist08:52:083
107222600,11sleep30-21swapper/307:42:363
28577225466,168sleep228627-21latency_hist12:37:072
27706224547,175sleep20-21swapper/207:27:092
2719122458,223sleep327199-21ntpq10:47:343
10244224363,92sleep20-21swapper/211:37:282
22063223879,141sleep20-21swapper/210:32:222
16843221516,140sleep216919-21mailstats11:57:352
32110221123,167sleep232259-21tail11:02:392
15990221117,178sleep216036-21ntpq10:12:312
12011221019,121sleep20-21swapper/211:42:332
18215220614,171sleep218251-21wc08:37:332
13749219414,87sleep20-21swapper/210:07:062
21885219013,165sleep221957-21switchtime07:07:392
26044218815,36sleep226077-21latency09:02:292
21045218641,117sleep021007-21latency_hist07:07:080
1657721809,155sleep216612-21ntpq08:32:322
8280217914,150sleep38328-21grep11:32:083
22870217616,130sleep20-21swapper/208:52:352
24195217414,58sleep023685-21apt-get08:57:180
24195217414,58sleep023685-21apt-get08:57:180
4891217016,137sleep24894-21cron11:22:052
4891217016,137sleep24894-21cron11:22:052
17629216614,19sleep20-21swapper/210:17:322
726221657,138sleep00-21swapper/008:02:330
1318921659,14sleep20-21swapper/211:47:212
6858216015,125sleep20-21swapper/208:02:232
12303216013,131sleep112422-21ls11:42:401
25559215811,36sleep20-21swapper/210:42:322
24232215818,64sleep20-21swapper/212:22:252
24232215818,64sleep20-21swapper/212:22:252
1908221518,104sleep20-21swapper/210:22:292
30318214713,120sleep230358-21ps10:57:342
192142147113,19sleep20-21swapper/212:07:072
28042214213,114sleep228139-21date10:52:092
31784214111,113sleep131846-21sendmail_mailst07:37:341
2501021419,16sleep20-21swapper/207:17:282
21229214110,119sleep221273-21ntpq08:47:302
29197214014,72sleep229227-21munin-run07:32:062
29197214014,72sleep229227-21munin-run07:32:062
10098213820,74sleep10-21swapper/111:37:231
2456521375,11sleep20-21swapper/210:37:522
2456521375,11sleep20-21swapper/210:37:522
9116213612,17sleep20-21swapper/209:52:082
13085213511,64sleep221087-21cyclictest08:22:222
5839213238,22sleep20-21swapper/211:22:382
2087421329,90sleep220912-21sed10:27:302
1347213210,86sleep21483-21date09:27:082
3194721288,13sleep00-21swapper/011:02:370
1142421289,63sleep211506-21mailstats09:57:412
3192021277,87sleep213441-21snmpd09:18:282
3192021277,87sleep213441-21snmpd09:18:282
1129921278,64sleep211298-21munin-run08:17:092
29731212421,83sleep329726-21apt-get07:32:233
882221237,36sleep20-21swapper/208:07:322
5307212313,50sleep20-21swapper/207:57:222
471121238,57sleep20-21swapper/209:37:222
21773212218,73sleep00-21swapper/007:07:370
17507211922,79sleep117520-21latency_hist08:37:071
24611211613,87sleep324711-21latency_hist07:17:093
9856211519,76sleep39981-21grep11:37:083
23626211514,36sleep123635-21/usr/sbin/munin07:12:301
9357211029,55sleep09350-21apt-get09:52:220
17001211019,71sleep00-21swapper/011:57:370
2757321079,14sleep20-21swapper/209:07:292
2757321079,14sleep20-21swapper/209:07:292
25454210716,74sleep325503-21wc12:27:073
25454210716,74sleep325503-21wc12:27:073
2108521078,15sleep20-21swapper/212:12:242
346221068,78sleep20-21swapper/207:52:172
346221068,78sleep20-21swapper/207:52:172
30644210516,72sleep130855-21sed09:17:091
26063210211,35sleep20-21swapper/212:27:302
26063210211,35sleep20-21swapper/212:27:302
2566210215,29sleep22688-21wc07:47:372
1404121029,37sleep20-21swapper/210:07:232
1296210211,60sleep00-21swapper/009:27:060
10139210248,38sleep110197-21/usr/sbin/munin08:12:281
287012997,36sleep20-21swapper/210:52:342
20102999,31sleep20-21swapper/209:27:332
718429810,69sleep07234-21if_eth011:27:330
2700229827,30sleep30-21swapper/312:32:073
2700229827,30sleep30-21swapper/312:32:073
2076529815,60sleep20-21swapper/212:12:082
1685529814,59sleep10-21swapper/110:17:071
1316229812,69sleep113171-21/usr/sbin/munin08:22:251
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

Valid XHTML 1.0 Transitional