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2026-08-15 - 15:52

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 Sat Aug 15, 2026 12:43:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
19821294727,9414sleep27817-21kworker/2:109:25:152
32762276316,732sleep39496-1kworker/3:2H11:50:123
1005026656,647sleep210091-21ntpq12:20:112
17233256639,492sleep2367-21snmpd09:16:312
106224126,368sleep21220-21sed11:51:122
13246239412,368sleep013285-21ntpq09:05:100
32283236613,21sleep20-21swapper/210:05:022
22876229238,207sleep222927-21sendmail11:19:452
22876229238,207sleep222927-21sendmail11:19:452
4850228550,190sleep24901-21latency_hist08:39:482
26736226231,186sleep226825-21fschecks_time08:05:072
11754226251,154sleep211774-21ntp_states09:00:112
11140226210,57sleep20-21swapper/210:40:112
11471223834,89sleep20-21swapper/212:25:082
22723223426,40sleep20-21swapper/209:35:092
21593221921,173sleep121739-21unixbench_multi09:30:191
30818221161,137sleep230856-21fschecks_count10:00:092
1087221130,145sleep21211-21sed08:25:182
4274220929,145sleep24359-21cat10:19:482
18263220829,142sleep218275-21munin-run11:04:472
5919220613,175sleep15997-21users08:40:191
24865220546,107sleep225010-21latency_hist07:59:502
29172220116,165sleep129223-21latency_hist11:39:471
2868421959,142sleep228766-21mailstats08:10:162
21732219430,148sleep221811-21latency_hist07:49:482
32633218720,150sleep132607-21latency_hist08:24:481
32220218038,102sleep232257-21modprobe11:49:462
29874217813,60sleep030011-21unixbench_singl09:55:180
29874217813,60sleep030011-21unixbench_singl09:55:180
6801216923,130sleep20-21swapper/212:10:102
2835121647,142sleep228496-21sed09:50:202
2258821586,13sleep00-21swapper/009:35:070
24455215210,104sleep2289-21dbus-daemon11:24:462
2783921514,126sleep00-21swapper/011:35:020
2400215196,15sleep20-21swapper/211:55:152
1100821479,99sleep211084-21unin-run08:59:472
21393214613,90sleep221536-21latency_hist11:14:492
14334214332,99sleep214355-21fschecks_count07:25:122
14334214332,99sleep214355-21fschecks_count07:25:122
13642214131,68sleep213756-21grep12:30:172
1755214025,90sleep11899-21cat08:29:491
5498213739,50sleep20-21swapper/208:40:122
25180213739,46sleep20-21swapper/208:00:062
4979213630,90sleep24980-21cpu12:05:012
4979213630,90sleep24980-21cpu12:05:012
24903213310,107sleep324247-21/usr/sbin/munin09:40:233
30958213113,14sleep00-21swapper/011:44:590
21377213137,50sleep221438-21processes09:30:162
22352212910,104sleep222393-21ntp_kernel_pll_07:50:122
7031212814,41sleep27050-21apt-get07:04:572
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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