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2026-06-05 - 21:08

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 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 Fri Jun 05, 2026 12:44:35)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2437521220,2chrt24376-21sleep11:55:160
198121220,2chrt1982-21sh10:32:010
1841021220,2chrt18412-21modprobe12:35:000
3249721210,3chrt32498-21runrttasks10:29:430
2027521190,2chrt20276-21sh11:00:080
529321170,3chrt5290-21ntp_states10:37:020
2508521170,3chrt25084-21seq10:17:530
1194621170,2sleep011990-21cut09:10:330
405021160,3chrt4046-21/usr/sbin/munin12:12:270
2999121160,3chrt29987-21ntpq09:36:370
2983721150,2chrt29835-21/usr/sbin/munin08:46:010
289721150,2chrt2896-21seq11:22:120
1643621150,2chrt16437-21sh07:33:250
1919521130,2sleep019194-21ls08:30:010
1724821130,2chrt17250-21aten2.4_rfpower10:55:340
1202521130,2sleep012030-21seq09:58:490
1272821120,2chrt12729-21ld11:37:070
1171721120,2chrt11709-21ps07:25:440
1996521100,4chrt19964-21cat08:30:410
3043821090,2chrt30437-21awk11:15:320
991221060,2chrt9913-21ssh10:44:300
852421050,2sleep08528-21latency_hist12:20:050
3020321030,2chrt30204-21runrttasks12:03:340
2804121000,2sleep028038-21load11:11:110
245812980,2sleep024584-21sed11:06:040
143162970,2sleep014317-21chrt12:28:110
43392900,2sleep04340-21chrt09:46:540
325372900,3chrt30812-21apt-get12:06:580
47082890,2sleep04711-21tail11:25:340
138702880,2sleep013871-21hostname10:50:340
110132820,2sleep011015-21chrt11:35:040
101152820,1sleep010117-21grep09:06:230
8502810,2sleep0851-21seq08:00:290
319732818,19sleep031987-21ntpq07:05:410
318302810,2sleep031831-21seq08:50:190
128852800,2sleep012886-21awk10:00:150
308222780,1sleep030823-21chrt07:55:490
189892770,2sleep018990-21chrt09:20:510
228142760,2sleep022815-21chrt08:35:310
150272760,2sleep015026-21seq11:40:510
285232750,2sleep028524-21basename08:45:000
210442750,3sleep021045-21dpkg11:50:130
120422710,2sleep012044-21chrt10:47:110
84122680,2sleep08413-21seq08:11:370
118152680,2sleep011816-21chrt12:25:020
140462660,1sleep014047-21cat08:21:310
226892600,1sleep022690-21chrt10:15:030
234752593,46sleep023484-21runrttasks07:45:010
170482593,8sleep017052-21seq09:17:250
192442574,6sleep019231-21ssh11:46:500
174692570,4chrt17468-21seq07:35:280
10692553,44sleep0997-21ntp_states09:42:000
186682544,7sleep018582-21apt-get12:35:250
44022530,2sleep04405-21cut08:05:450
82612523,8sleep08265-21sh09:52:430
51032500,2chrt5101-21/usr/sbin/munin07:15:270
65312480,3chrt6530-21/usr/sbin/munin09:00:470
53862480,1sleep05389-21sendmail09:00:000
1537904718,22cyclictest0-21swapper09:29:550
186332463,36sleep018639-21chrt10:08:200
1537904617,22cyclictest0-21swapper09:32:370
1537904514,23cyclictest0-21swapper10:23:340
27402430,1sleep02754-21sed07:10:560
153790425,28cyclictest27899-21ntpq07:51:030
153790415,18cyclictest24915-21ntpq07:46:160
1537904113,9cyclictest8793-21irqstats07:20:460
1537904014,17cyclictest11-21ksoftirqd/008:15:240
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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