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2026-07-02 - 13:56

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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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 the highest latencies:
System rackfslot4s.osadl.org (updated Thu Jul 02, 2026 00:44:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3056621220,2chrt30542-21ntp_states22:32:570
3124621210,2chrt31248-21fschecks_count00:10:520
349021190,2sleep03491-21ld20:11:140
1549521180,3chrt15496-21rm00:35:550
977421160,2chrt9209-21apt-get19:30:390
1472121160,2sleep014722-21idleruntime21:21:010
1309921160,3chrt13098-21cat20:26:280
2546321150,2chrt25462-21/usr/sbin/munin22:25:390
278221140,2chrt2781-21seq22:40:040
1659121130,4chrt16590-21cut23:00:360
1235621130,2chrt12353-21hddtemp_smartct22:06:000
824021120,2sleep08241-21apt00:25:120
617521110,4chrt6176-21chrt22:44:590
2145521110,2chrt21454-21/usr/sbin/munin21:31:040
1785821100,2chrt17859-21ssh21:25:510
1602521100,4chrt16026-21seq22:59:450
291121090,3chrt2912-21sh23:28:160
1527621070,3chrt15277-21sleep19:39:050
683321060,2chrt6836-21idleruntime19:25:400
549621020,2chrt5497-21sleep21:06:190
832721010,2chrt8328-21sleep22:00:090
370421010,2sleep03705-21seq21:52:310
1811021010,2chrt18111-21sh19:43:170
326632980,2sleep032664-21seq23:24:450
15362980,2chrt1537-21sh20:08:380
114062980,2sleep011407-21cat23:41:010
153482970,1sleep015350-21aten2.4_rfpower22:10:370
261622960,2sleep026165-21wc23:15:040
121482930,2sleep012149-21ld21:16:500
294612900,2sleep029464-21idleruntime-cro23:20:010
102002850,2sleep010201-21chrt22:50:500
296442840,1sleep029647-21tail19:10:250
288922840,2sleep028893-21kernelversion00:07:100
313792820,2sleep031381-21cut21:45:560
92852810,2sleep09288-21chrt20:20:430
75322800,1sleep07533-21seq21:58:380
300892800,2sleep030091-21grep20:01:310
268082790,2sleep026809-21chrt21:39:070
48692770,2sleep04868-21grep23:31:290
151822740,2sleep015183-21seq20:30:380
305912720,1sleep030593-21cut20:55:250
218542710,2sleep021855-21chrt22:20:300
86752660,1sleep08676-21chrt22:48:010
17392614,8sleep01775-21irqrtprio21:00:430
178312584,44sleep0439-21sh20:35:240
246262570,1sleep024657-21cat00:01:010
179552570,3sleep017947-21ssh23:50:580
49542540,2sleep04955-21chrt00:20:150
264472540,2sleep026445-21sshd20:48:100
280022533,8sleep028026-21perl21:40:540
190162534,41sleep019026-21hddtemp_smartct22:15:590
115252525,37sleep011528-21seq00:30:100
89832510,1sleep08986-21seq21:12:110
227492514,40sleep022753-21sleep23:09:550
237522500,2sleep023800-21awk19:51:280
29270904918,23cyclictest0-21swapper23:58:540
2724224910,25sleep027253-21ntpq19:05:400
214842490,2chrt21482-21basename20:41:140
165912490,2chrt16582-21ssh23:48:510
12842490,1sleep01285-21ld19:16:100
105002492,37sleep010570-21sort23:40:040
189112482,36sleep018748-21apt-get19:45:070
29270904716,23cyclictest0-21swapper00:19:580
69582464,34sleep06965-21users20:16:320
296322440,2chrt29633-21sh20:53:220
2927090444,19cyclictest4496-21ntpq19:21:190
29270903817,14cyclictest0-21swapper19:55:320
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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