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2026-03-25 - 14:54

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #f, slot #4

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.

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
Compare latency of primary with shadow system
Characteristics of all highest latencies:
System rackfslot4s.osadl.org (updated Wed Mar 25, 2026 00:44:36)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2170821250,2chrt21706-21ld21:36:470
3051121230,2sleep030512-21fschecks_time00:15:540
90921220,2sleep0911-21open_files19:21:220
2781721200,2chrt27818-21missed_timers00:11:190
624521160,2chrt6246-21runrttasks23:39:320
3156421160,2sleep031565-21stty22:40:340
2712621160,2chrt27118-21diskstats20:56:070
2871521150,3chrt28716-21runrttasks20:06:070
1042121150,2chrt10422-21runrttasks22:08:330
3273521120,3chrt32736-21ssh21:53:220
968721090,2sleep09688-21runrttasks00:32:480
3133021090,2chrt31331-21sleep19:18:410
510321080,4chrt5104-21ld21:12:070
421621070,2sleep04217-21seq22:47:250
357521070,2chrt3576-21runrttasks00:24:080
1832321060,2sleep018325-21chrt23:57:120
1609821050,3sleep016099-21seq23:54:140
1229221000,2chrt12293-21cat20:31:260
254852980,2sleep025486-21seq23:19:470
92682970,2sleep09269-21chrt23:43:460
75462970,2chrt7548-21sh21:16:010
154542960,2sleep015455-21cat20:36:300
183002940,2sleep018301-21chrt23:08:300
225032930,2sleep022504-21chrt19:56:070
109402930,2sleep010938-21timerandwakeup22:57:250
280962920,1sleep028097-21cat21:46:150
298692900,2sleep029870-21rm22:37:200
263032900,2sleep026304-21seq00:09:460
174282890,2sleep017430-21cut20:40:340
28922870,2sleep02893-21chrt21:57:150
57332860,2sleep05734-21seq20:20:590
193242850,2sleep019325-21aten2.4-expect23:10:320
190032830,2sleep019004-21sh21:32:370
64052820,2sleep06407-21chrt22:02:200
259582810,2sleep025959-21sshd22:31:260
132402800,1sleep013245-21latency_hist23:50:060
72722780,2sleep07273-21chrt22:52:060
5562770,2sleep0557-21cut23:30:510
140612750,2sleep014062-21cat00:40:060
249892740,2sleep024987-21if_can020:00:410
231882740,1sleep023189-21cut00:05:030
113162720,2sleep011317-21ssh21:21:130
301862710,1sleep030187-21seq23:26:110
154622710,1sleep015466-21cut22:16:060
120072660,2sleep012005-21if_err_eth022:11:050
199302650,2sleep019931-21runrttasks22:22:260
264272630,2sleep026428-21runrttasks21:44:160
53402610,2sleep05337-21nfs4_client00:26:160
257052610,1sleep025706-21ls19:10:030
208332600,2sleep020838-21tr20:45:420
231532570,2sleep023156-21wc22:27:220
145452550,1sleep014546-21/usr/sbin/munin23:03:010
67722492,39sleep06780-21ntpq19:30:500
236102490,1sleep023611-21chrt20:50:320
273472480,3sleep027339-21ssh23:21:520
149052486,35sleep011-21ksoftirqd/019:45:020
297012462,36sleep029696-21apt-get21:00:130
25657904413,15cyclictest0-21swapper21:29:180
2565790436,9cyclictest9839-21memory19:35:500
2565790435,20cyclictest1399-21/usr/sbin/munin20:16:070
2565790434,11cyclictest5592-21munin-run19:30:020
2565790414,11cyclictest1627-21ntpq21:06:180
2565790404,8cyclictest31751-21ntpq20:11:030
2565790403,11cyclictest8240-21hddtemp_smartct20:25:380
25657904012,10cyclictest16724-21users19:46:290
2565790383,9cyclictest26810-21chrt19:10:500
2565790383,17cyclictest18552-21diskstats19:50:320
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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