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2025-12-19 - 20:00

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 highest latencies:
System rackfslot4s.osadl.org (updated Fri Dec 19, 2025 12:44:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3206721340,2sleep032066-21/usr/sbin/munin11:50:370
2257121290,3chrt22565-21ntpq10:46:530
2767921240,3chrt27655-21ntp_states12:32:020
2701121200,3chrt26987-21ntpq09:16:210
2082121190,2chrt20823-21runrttasks11:33:100
1492821180,1sleep014929-21runrttasks12:12:430
487921160,3sleep04875-21ssh11:09:490
3159121160,3chrt31593-21chrt11:50:000
1770421160,2chrt17705-21/usr/sbin/munin09:51:250
1354821160,4chrt13549-21sleep07:11:140
1350321160,2chrt13500-21ld11:22:070
721221150,2chrt7210-21/usr/sbin/munin11:12:270
804721140,2sleep08048-21gcc09:36:320
2553021130,2chrt25527-21ntpq10:51:150
1901121130,4chrt19000-21ssh12:19:320
1766021130,3chrt17661-21runrttasks07:18:150
614021120,1sleep06138-21proc_pri10:22:130
581721110,2sleep05818-21sh09:33:220
3111021110,3chrt31109-21sshd08:31:210
1091021110,2sleep010911-21cut10:30:040
2794521100,2chrt27946-21seq11:44:180
2588021100,3chrt25876-21ntpq07:31:040
1661221080,2chrt16611-21seq11:26:450
1709721060,1sleep017100-21seq10:39:060
1097321060,3chrt10975-21sleep09:41:090
1493021040,2chrt14931-21sleep08:57:050
2439921020,2chrt24400-21sleep07:29:420
1856921010,2sleep018571-21ld08:11:100
1446121000,1sleep014463-21irqrtprio09:46:090
215982980,2sleep021600-21chrt08:16:030
89612940,1sleep08962-21seq12:04:200
290442940,1sleep029045-21chrt07:36:100
233072940,3sleep023308-21chrt09:59:560
244432910,2sleep024444-21irqrtprio10:01:040
68962850,2sleep06897-21chrt08:45:180
309462770,1sleep030947-21seq12:36:560
12131907339,14cyclictest30943-21apt-get07:40:150
273602720,1sleep027361-21/usr/sbin/munin10:05:480
12131907239,13cyclictest10902-21ntpq12:06:450
32282710,2sleep03227-21seq11:55:550
115462710,2sleep011548-21grep10:30:500
235142700,1sleep023510-21proc_pri11:37:120
12131907038,23cyclictest6536-21sleep07:52:110
12131907038,14cyclictest30653-21diskstats10:10:450
12131907036,25cyclictest412-21snmpd10:56:320
12131906938,22cyclictest24055-21sleep12:26:270
12131906938,21cyclictest32634-21aten2.4_rfpower09:25:330
12131906938,12cyclictest22244-21chrt09:10:010
12131906937,23cyclictest412-21snmpd07:56:090
12131906844,15cyclictest8900-21df_inode11:15:410
12131906745,14cyclictest2709-21ntpq10:17:060
12131906745,14cyclictest23798-21sleep09:11:380
12131906743,14cyclictest25224-21users08:21:320
12131906739,19cyclictest10292-21seq08:50:290
12131906738,21cyclictest877-1kworker/u3:211:04:000
12131906738,20cyclictest19866-21df_inode12:20:430
12131906737,22cyclictest15398-21ld08:06:040
12131906735,23cyclictest2380-21cut07:45:430
12131906735,15cyclictest2052-21ntpq08:36:510
101562678,47sleep010166-21runrttasks07:05:450
200922660,1sleep020093-21seq10:43:140
12131906641,16cyclictest13774-21seq08:04:170
12131906637,21cyclictest412-21snmpd08:41:040
12131906635,21cyclictest19540-21ntpq07:20:530
12131906544,13cyclictest16529-21runrttasks09:00:290
12131906542,13cyclictest32413-21sleep09:25:040
12131906442,14cyclictest26749-21aten2.4_rfpower08:25:230
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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