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2026-06-01 - 19:55

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 Mon Jun 01, 2026 12:44:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2919221400,1sleep029193-21ps07:05:590
1690521290,2chrt16907-21irqrtprio08:30:440
2561021250,2chrt25613-21cron09:34:590
830821210,3chrt8306-21df_inode07:25:310
208821210,2sleep02087-21seq12:13:150
1842821210,2chrt18426-21http11:50:050
641621200,2chrt6418-21awk12:20:110
566421190,4chrt5658-21ntpq10:41:220
186521180,2chrt1863-21ld09:47:220
2178521170,3chrt21783-21if_eth211:06:020
2840221150,2chrt28403-21timerwakeupswit07:56:280
1149821150,2chrt11490-21diskstats10:50:480
1467921120,1sleep014680-21chrt11:44:060
323021110,3chrt3228-21python307:16:270
368921090,2chrt3688-21apt-config09:50:180
2903221080,2sleep029031-21hostname08:50:220
550621070,3chrt5507-21mii-tool07:20:420
3228821070,2chrt32289-21sleep10:32:310
2568021050,3chrt25681-21sleep10:22:340
2996621040,2chrt29967-21sleep11:18:100
2372721020,2sleep023728-21seq07:50:180
1638421020,2sleep016389-21seq10:09:130
237562970,2sleep023757-21awk11:57:120
203782970,2sleep020379-21chrt10:15:320
176092960,2sleep017612-21missed_timers12:36:150
94942930,2sleep09495-21fschecks_count09:10:540
189022920,2sleep018903-21seq11:50:300
34172910,1sleep03418-21chrt10:38:120
151542850,2sleep015155-21sh12:32:230
52402810,2sleep05239-21seq11:30:280
96312800,2sleep09633-21if_err_can011:36:430
321042800,1sleep032105-21chrt08:55:180
33352790,2sleep03336-21seq11:26:490
280522790,1sleep028050-21missed_timers10:26:130
37062770,2sleep03708-21seq08:10:180
299902760,2sleep029988-21interrupts12:06:490
152862750,2sleep015287-21chrt09:19:390
123952720,3sleep012396-21seq12:28:400
157742700,2sleep015776-21ntpq10:56:410
87852690,1sleep08786-21chrt09:10:020
69292680,1sleep06930-21chrt08:15:260
39622660,2sleep03964-21cut12:16:040
204602610,2sleep020461-21gcc09:26:450
297682580,2sleep029769-21fschecks_time09:40:530
196832550,2sleep019685-21ls11:02:240
276622542,6sleep027673-21/usr/sbin/munin08:47:180
285652530,1sleep028566-21latency_hist12:05:070
27042520,1sleep02705-21seq08:07:510
189372522,41sleep018995-21python307:41:250
82072502,41sleep08196-21ntpq09:56:220
30938904918,24cyclictest0-21swapper09:38:400
105252490,1sleep010526-21seq10:49:170
311392480,2chrt31121-21ntpq08:01:070
256162480,2sleep025617-21ssh11:11:280
144242470,2chrt14423-21seq07:35:200
320562463,34sleep032096-21ntp_kernel_err07:10:510
30938904517,21cyclictest0-21swapper09:23:130
184512453,35sleep018455-21ntpq10:11:530
208382442,35sleep020840-21ntpq08:36:510
3093890434,20cyclictest23077-21smartctl08:40:390
30938904316,19cyclictest0-21swapper10:04:250
30938904316,10cyclictest13045-21runrttasks08:25:190
30938904313,23cyclictest0-21swapper11:24:150
27602430,3sleep02761-21seq09:00:150
3093890425,18cyclictest12080-21ntpq07:30:530
30938904016,10cyclictest9895-21runrttasks08:20:110
30938904015,19cyclictest20799-21aten2.4_rfpower07:45:240
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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