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2025-12-03 - 13:44

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 50 highest latencies:
System rackbslot7s.osadl.org (updated Wed Dec 03, 2025 00:43:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
573215818,1559sleep119120-21kworker/1:021:24:201
573215818,1559sleep119120-21kworker/1:021:24:201
20995210346,1013sleep221030-21ntpq22:28:352
31330291412,888sleep331408-21users21:18:373
311892511117,368sleep231327-21unixbench_multi21:18:362
23123242023,382sleep123130-21/usr/sbin/munin19:13:231
833623876,366sleep28380-21ntpq20:08:282
29637234912,200sleep229767-21unixbench_multi21:13:352
27689233723,294sleep327684-21apt-get19:28:193
214562314103,194sleep221522-21cpuspeed19:08:192
14713230887,197sleep214818-21timerandwakeup22:08:362
20224228836,92sleep220352-21timerwakeupswit20:43:342
216102287140,41sleep20-21swapper/220:48:312
16253227115,19sleep20-21swapper/223:56:192
23594224515,212sleep323720-21wc00:18:343
12086223724,193sleep212178-21apt-key22:03:022
3279221931,20sleep20-21swapper/219:53:182
10594221118,165sleep20-21swapper/223:38:262
10594221118,165sleep20-21swapper/223:38:262
19765220222,41sleep00-21swapper/000:08:130
12536219532,123sleep211962-21/usr/sbin/munin23:43:432
5054219113,123sleep20-21swapper/221:38:312
5054219113,123sleep20-21swapper/221:38:312
17232218911,163sleep117238-21grep22:18:161
29948218711,158sleep230097-21tail19:33:352
24992218213,127sleep225054-21cut00:23:302
739321779,153sleep27540-21cat21:48:042
739321779,153sleep27540-21cat21:48:042
9548217528,84sleep29678-21apt-key20:13:052
1927821737,129sleep25666-21snmpd20:43:022
7956217211,114sleep20-21swapper/223:31:192
8639216930,46sleep38636-21apt-get23:33:143
1083216411,140sleep21156-21mailstats23:08:292
1083216411,140sleep21156-21mailstats23:08:292
12728215826,105sleep00-21swapper/020:23:040
25724215615,41sleep20-21swapper/222:43:292
29326215214,124sleep329365-21ntpq21:13:283
26621215216,19sleep10-21swapper/122:48:051
28254214615,70sleep20-21swapper/221:08:342
13696214317,83sleep20-21swapper/220:23:552
22757213927,75sleep222910-21sed00:18:042
1861213514,100sleep20-21swapper/221:28:462
1861213514,100sleep20-21swapper/221:28:462
12566213539,18sleep20-21swapper/220:23:022
1644021347,46sleep20-21swapper/220:33:122
791213317,105sleep00-21swapper/021:27:060
791213317,105sleep00-21swapper/021:27:060
31417213212,52sleep231505-21timerandwakeup19:38:322
2438213010,102sleep32439-21sshd21:30:203
2438213010,102sleep32439-21sshd21:30:203
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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