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2026-05-15 - 12:11

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 Fri May 15, 2026 00:44:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
975522150,2chrt9754-21basename19:05:200
2877921210,2chrt28780-21fschecks_time19:35:360
308621190,2sleep03087-21chrt21:28:540
2277621180,2chrt22777-21tune2fs23:35:540
629921170,2chrt6297-21if_eth023:11:050
713621160,3chrt7119-21apt-get20:45:130
1144521160,3chrt22486-21diskmemload22:30:230
1023621150,2chrt10237-21chrt00:05:420
975221140,2sleep09754-21proc_pri22:27:090
492721130,3chrt4928-21aten2.4_rfpower22:20:320
2791621130,2chrt27918-21awk21:17:230
185121130,2chrt1849-21ld20:36:040
2066521090,2chrt20666-21sleep19:21:340
2408521080,3chrt24086-21runrttasks22:49:030
2710021070,3chrt27101-21ls22:05:040
2209821070,3chrt22100-21sh00:23:010
274821050,4chrt2749-21seq23:54:320
2997521030,3chrt29976-21timerwakeupswit22:57:210
266202980,2chrt26623-21sleep00:30:310
5572950,2sleep0558-21chrt20:35:020
165712940,2sleep016572-21chrt22:37:190
159732910,2sleep015974-21runrttasks00:14:220
152872910,1sleep015288-21ld21:46:360
262442890,2sleep026245-21seq22:52:000
196312880,2sleep019632-21seq22:41:580
248282870,2sleep024829-21seq00:27:100
89302860,2sleep08931-21seq23:15:270
142752810,3sleep014277-21ls20:55:460
6252790,2sleep0626-21chrt22:13:400
32652780,2sleep03267-21chrt22:17:190
185362780,1sleep018537-21runrttasks23:29:470
50892750,1sleep05090-21ntpq21:31:310
255722750,2sleep025574-21sh21:14:250
148602750,2sleep014861-21seq20:05:320
266652740,2sleep026667-21grep19:31:240
327452730,1sleep032746-21collect223:01:380
207582730,2sleep020760-21switchtime23:32:210
84702700,2sleep08472-21sed00:02:200
42152700,2sleep04216-21seq23:07:230
80602620,2sleep08059-21/usr/sbin/munin21:36:340
325802580,2sleep032581-21seq21:24:460
168162583,8sleep016821-21diskstats21:00:320
259052560,2sleep025908-21chrt23:40:430
211322553,44sleep021159-21perl21:55:530
188082550,1sleep018809-21sh21:51:580
142712550,2sleep014272-21chrt23:22:310
53732543,8sleep05374-21ntpq20:41:440
110192533,8sleep011016-21diskstats21:40:440
56762510,2sleep05677-21chrt19:50:360
36002513,39sleep03606-21diskstats23:55:460
251282513,40sleep025132-21ntpq20:21:180
164242510,2sleep016425-21seq00:15:090
230472503,39sleep023052-21chrt19:25:470
304722490,2sleep030480-21ld23:46:490
272802483,6sleep027198-21apt-get22:05:250
114012473,33sleep011390-21apt-get20:00:140
102232472,6sleep010219-21apt-get20:50:130
208912463,35sleep020898-21ntpq21:06:260
12613904614,23cyclictest0-21swapper19:55:400
301052440,3chrt30108-21aten2.4_rfpower00:35:370
12613904316,21cyclictest0-21swapper19:48:590
1261390424,29cyclictest13274-21hddtemp_smartct19:10:370
1261390424,11cyclictest19224-21users20:11:290
12613904118,16cyclictest0-21swapper20:25:100
12613904116,19cyclictest746-21runrttasks19:41:520
12613904116,17cyclictest16206-21/usr/sbin/munin19:15:310
1261390377,10cyclictest21728-21sleep20:15:510
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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