You are here: Home / Technical Services / OSADL QA Farm Real-time / 
2026-04-10 - 18:54

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 50 highest latencies:
System rackbslot7s.osadl.org (updated Fri Apr 10, 2026 12:43:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
108982370515,3670sleep14156-21kworker/u8:308:56:451
133692274911,2722sleep124961-1kworker/1:0H07:22:191
6090283816,805sleep36094-21diskstats08:41:533
6090283816,805sleep36094-21diskstats08:41:533
20697280816,776sleep320760-21/usr/sbin/munin09:26:563
7230266014,630sleep17240-21/usr/sbin/munin12:11:361
7230266014,630sleep17240-21/usr/sbin/munin12:11:361
32404235322,314sleep332473-21/usr/sbin/munin11:47:023
82062291123,33sleep28345-21grep12:12:052
82062291123,33sleep28345-21grep12:12:052
19416228887,179sleep218909-21apt-get11:06:472
7744228596,129sleep27821-21latency_hist07:06:372
142662259138,19sleep20-21swapper/210:51:362
30084225668,150sleep230196-21latency_hist11:41:362
22527223659,29sleep20-21swapper/211:16:442
212442227107,25sleep20-21swapper/207:46:552
5448222014,191sleep35464-21kernelversion10:21:573
5448222014,191sleep35464-21kernelversion10:21:573
32752222027,171sleep2373-21mailstats08:22:052
32752222027,171sleep2373-21mailstats08:22:052
19327222029,179sleep219338-21uname09:21:582
19327222029,179sleep219338-21uname09:21:582
27986221311,118sleep228017-21awk09:51:352
27986221311,118sleep228017-21awk09:51:352
26504221359,19sleep20-21swapper/208:02:142
28524220510,95sleep20-21swapper/211:36:352
7315220349,24sleep20-21swapper/208:46:372
7315220349,24sleep20-21swapper/208:46:372
3118422007,180sleep231267-21mailstats08:17:042
29609220031,22sleep20-21swapper/209:56:352
29609220031,22sleep20-21swapper/209:56:352
23628220017,170sleep223635-21cpu09:36:492
438221987,178sleep24356-21/usr/sbin/munin12:01:482
9319219315,39sleep29453-21latency_hist07:11:382
9257218511,149sleep20-21swapper/212:17:022
9257218511,149sleep20-21swapper/212:17:022
26117218558,91sleep226157-21uname11:27:022
18009218410,157sleep218046-21ntp_kernel_err11:02:022
14077218319,136sleep314224-21latency_hist09:06:373
1371921837,161sleep213692-21latency_hist12:31:362
1529421809,160sleep215319-21ntpq07:27:002
463121777,160sleep213441-21snmpd10:18:122
1935217010,146sleep02014-21find08:27:040
1935217010,146sleep02014-21find08:27:040
17131216813,106sleep20-21swapper/210:58:472
11217216617,132sleep111304-21find12:22:061
274521648,142sleep22764-21apt-get11:56:432
9199215919,86sleep20-21swapper/208:51:542
9912215516,102sleep20-21swapper/210:36:502
13362215111,64sleep20-21swapper/207:22:162
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

Valid XHTML 1.0 Transitional