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2026-07-05 - 02:22

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 Jul 04, 2026 12:43:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
261872778613,7758sleep012916-21kworker/0:212:29:030
21582210599,1043sleep15780-1kworker/1:2H12:14:461
12220267534,601sleep212322-21wc10:00:042
10496234583,211sleep210529-21grep08:14:202
10496234583,211sleep210529-21grep08:14:202
4678233818,295sleep04820-21grep11:19:540
25040231964,186sleep225078-21fschecks_count12:24:412
6618231619,279sleep06611-21apt-get09:44:350
12458225844,194sleep212506-21fschecks_count08:19:412
2460122518,227sleep0195-21jbd2/mmcblk2p2-10:39:520
2460122518,227sleep0195-21jbd2/mmcblk2p2-10:39:520
21732224229,193sleep121896-21unixbench_singl07:04:551
9345223910,217sleep0364-21snmpd09:53:240
9345223910,217sleep0364-21snmpd09:53:240
384223415,206sleep3443-21sendmail_mailqu07:39:493
1176223044,70sleep21186-21modprobe07:44:202
28567222212,195sleep328608-21ntpq09:09:463
28567222212,195sleep328608-21ntpq09:09:463
10881221018,165sleep20-21swapper/208:14:412
2184220871,20sleep20-21swapper/211:14:222
10287220828,124sleep20-21swapper/211:39:382
10287220828,124sleep20-21swapper/211:39:382
25943220445,147sleep225517-21/usr/sbin/munin10:44:472
8249220065,112sleep28311-21fschecks_time09:49:382
8249220065,112sleep28311-21fschecks_time09:49:382
17848219714,142sleep217930-21fschecks_time10:19:392
17522219113,82sleep217464-21latency_hist10:19:222
13017218814,129sleep2225-21systemd-journal11:49:192
13017218814,129sleep2225-21systemd-journal11:49:192
30890218413,21sleep00-21swapper/007:34:410
2783321809,158sleep0364-21snmpd09:08:580
2783321809,158sleep0364-21snmpd09:08:580
14656216912,142sleep014800-21latency_hist11:54:220
14656216912,142sleep014800-21latency_hist11:54:220
777421619,114sleep27806-21tune2fs08:04:392
23909216116,124sleep123940-21wc07:14:231
16692215917,49sleep00-21swapper/011:59:470
24679215517,122sleep124820-21unixbench_multi10:39:531
24679215517,122sleep124820-21unixbench_multi10:39:531
24274215441,58sleep224346-21munin-node07:14:282
22883214914,18sleep20-21swapper/210:34:532
32609214417,28sleep20-21swapper/209:24:222
29982214232,56sleep20-21swapper/209:14:412
29982214232,56sleep20-21swapper/209:14:412
22611214220,105sleep00-21swapper/007:09:370
8386213827,65sleep20-21swapper/211:34:212
474621338,69sleep24810-21sendmail-msp09:39:202
27705213345,49sleep227727-21cpu07:24:382
502421329,108sleep25061-21ps07:54:502
502421329,108sleep25061-21ps07:54:502
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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