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2026-03-31 - 01:06

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 the 792 highest latencies:
System rackfslot4s.osadl.org (updated Mon Mar 30, 2026 12:44:36)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2301621300,2sleep023017-21runrttasks10:03:590
932521230,2chrt9326-21aten2.4_rfpower11:20:340
693921190,3chrt6936-21ntpq11:16:220
420221170,2chrt4203-21seq10:24:510
2955721170,3chrt29556-21seq10:13:480
2567121160,2chrt25672-21sleep10:07:240
2063621160,3chrt20635-21sed12:26:050
1545221160,2chrt15453-21chrt08:11:140
3230621150,2sleep032307-21chrt09:30:020
3029821140,2chrt30299-21sh10:15:160
2344921140,2chrt23447-21grep12:30:370
1456421130,2chrt14565-21runrttasks11:27:450
3086021080,3chrt30861-21chrt11:04:160
2536221070,2chrt25363-21sh10:55:560
816421060,3chrt8165-21sh10:30:370
3247121060,3chrt32474-21ssh11:55:340
2438921060,3chrt24390-21runrttasks11:42:250
239872980,1sleep023988-21chrt10:53:450
56182950,2sleep05619-21chrt09:37:590
188392950,2sleep018840-21chrt12:23:120
133882880,2sleep013387-21basename12:15:340
196292860,1sleep019631-21cut09:10:550
51532850,2sleep05156-21sed12:02:230
309632850,1sleep030964-21/usr/sbin/munin07:45:240
114082840,2sleep011409-21chrt10:35:330
95912830,2sleep09592-21sort08:55:020
63812830,2sleep06382-21chrt10:27:180
185762830,2chrt18525-21ntp_states08:16:160
129802830,1sleep012981-21basename09:00:240
227532820,2sleep022755-21cpu09:15:380
94842800,2sleep09486-21chrt12:09:420
313102800,1sleep031313-21wc08:36:280
19082760,2sleep01909-21chrt07:50:340
276182750,2sleep027619-21/usr/sbin/munin12:36:160
85592740,2sleep08560-21seq09:42:200
265272730,1sleep026526-21date08:30:030
195932730,2sleep019594-21seq07:26:000
183712720,2sleep018372-21ssh11:33:570
27712710,4sleep02772-21seq11:11:070
154222690,2sleep015423-21seq07:20:210
7072680,2sleep0708-21basename09:31:020
277742650,1sleep027778-21grep09:22:260
200742620,2sleep020075-21gcc10:47:560
154102624,8sleep015408-21ntpq09:52:260
46232600,3sleep04624-21chrt08:46:000
193652593,8sleep019370-21chrt09:58:150
283712573,7sleep028415-21if_eth007:40:410
225332573,7sleep022575-21ntpq07:30:510
178022560,2sleep017805-21sort10:45:070
167342550,2sleep016736-21runrttasks09:05:440
122912542,6sleep012317-21aten2.4_rfpower07:15:230
211082530,2sleep021109-21runrttasks11:37:330
577625011,23sleep05762-21apt-get07:05:140
21772482,38sleep02103-21ssh11:10:130
91752473,35sleep09233-21grep08:01:380
269852470,2chrt26951-21ssh11:46:280
8776904617,21cyclictest0-21swapper09:49:090
265912450,2chrt26590-21sshd07:37:160
877690446,18cyclictest12048-21munin-run07:15:000
8776904415,21cyclictest0-21swapper11:54:290
8776904319,18cyclictest11-21ksoftirqd/007:55:280
281592430,3sleep028161-21grep08:31:280
101452430,4chrt10146-21fschecks_count08:55:360
877690425,29cyclictest18856-21diskmemload12:12:340
877690406,26cyclictest12220-21ntpq08:06:020
8776904016,17cyclictest21766-21sshd08:21:210
7302390,2sleep0729-21seq08:40:280
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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