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2026-05-01 - 21:58

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 Fri May 01, 2026 12:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
151662682721,6772sleep09144-21kworker/0:010:52:130
87632135312,1327sleep38747-21apt-get08:50:393
18986274426,701sleep219017-21/usr/sbin/munin07:40:442
26269238316,348sleep326271-21sshd08:03:103
54023559,16sleep00-21swapper/010:05:450
13812230752,195sleep013964-21latency_hist07:25:230
31153230511,279sleep031259-21tune2fs10:00:400
7652227464,152sleep07800-21unixbench_multi08:45:520
37742267111,134sleep03919-21latency_hist12:00:230
22367224760,89sleep022409-21fschecks_count11:16:370
20530222136,74sleep020548-21kernelversion07:45:420
16450222014,182sleep016588-21grep10:55:530
5178221829,172sleep05281-21latency_hist08:40:230
24310221318,69sleep00-21swapper/007:55:520
1347221010,183sleep11421-21find08:25:501
10707221011,25sleep00-21swapper/007:15:340
3038220940,107sleep00-21swapper/010:15:220
31653220630,138sleep031701-21awk08:20:360
2802622069,134sleep00-21swapper/008:10:220
8473219510,125sleep07904-21/usr/sbin/munin10:30:490
1429821935,27sleep00-21swapper/012:31:330
11708219314,134sleep00-21swapper/010:40:510
15552219214,164sleep015618-21switchtime09:10:520
23513218519,149sleep323648-21cat11:20:233
8893218222,146sleep38933-21if_eth012:15:403
6801218245,66sleep00-21swapper/012:10:200
18594218074,50sleep018680-21latency_hist11:05:220
878721689,123sleep08833-21grep08:50:570
28663216715,136sleep228134-21apt-get11:35:332
28663216715,136sleep228134-21apt-get11:35:332
22200216514,135sleep28614-1kworker/2:0H11:15:342
7645216444,96sleep00-21swapper/007:05:490
26141216126,92sleep00-21swapper/009:45:370
156632160106,41sleep00-21swapper/007:30:360
39922158103,42sleep00-21swapper/012:00:350
2256321587,93sleep022698-21latency_hist09:35:230
6098215610,131sleep06228-21grep08:40:550
24347215116,76sleep00-21swapper/009:40:360
24347215116,76sleep00-21swapper/009:40:360
14194215129,85sleep014341-21awk09:05:510
25186214923,17sleep00-21swapper/008:00:360
12101214614,25sleep06972-21cyclictest09:00:420
29512214510,76sleep00-21swapper/009:55:430
2986721438,22sleep00-21swapper/008:15:230
2986721438,22sleep00-21swapper/008:15:230
1891214326,85sleep013441-21snmpd11:52:230
15461214311,116sleep214974-21/usr/sbin/munin09:10:502
10816214310,103sleep010930-21latency_hist10:40:220
1404721389,44sleep00-21swapper/007:25:360
1404721389,44sleep00-21swapper/007:25:360
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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