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2025-09-18 - 03:13

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 the 792 highest latencies:
System rackfslot4s.osadl.org (updated Wed Sep 17, 2025 12:44:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1249321230,2chrt12485-21ntpq10:16:580
714621200,3chrt7147-21grep09:10:050
1571421160,2chrt15715-21sh07:18:440
2913721140,2chrt29139-21if_err_eth211:45:580
1097821140,2sleep010979-21latency_hist10:15:040
1963621060,2chrt19637-21ld09:31:370
1482921060,2chrt14828-21sh08:20:390
1346121050,2chrt13462-21sleep07:14:540
17722870,2sleep01774-21cut10:56:280
308402810,3chrt30820-21ntpq09:51:210
202102770,1sleep020213-21cut10:31:070
47332680,1sleep04736-21cut08:00:450
173962680,2sleep017397-21ssh11:25:080
315352530,3chrt31087-21apt-get11:50:250
16572530,2sleep01659-21aten2.4_rfpower07:55:270
239692520,1sleep023968-21cut09:40:070
222152520,3chrt22213-21/usr/sbin/munin12:31:060
90052510,2sleep09007-21sed08:10:060
323932510,2chrt32379-21ntpq07:50:580
264562510,3chrt26454-21/usr/sbin/munin10:42:110
87712500,2chrt8746-21ssh09:12:310
11020905019,23cyclictest0-21swapper11:55:060
67142490,4chrt6712-21/usr/sbin/munin11:05:420
144742490,1sleep014512-21cat12:17:160
11020904919,22cyclictest0-21swapper12:00:100
11020904918,22cyclictest0-21swapper10:27:410
11020904918,22cyclictest0-21swapper09:44:550
11020904817,22cyclictest0-21swapper11:02:470
11020904817,21cyclictest0-21swapper11:23:340
11020904816,24cyclictest0-21swapper12:22:300
11020904816,23cyclictest0-21swapper12:29:050
33672470,2chrt3365-21/usr/sbin/munin09:01:230
262862470,3chrt26287-21latency_hist07:40:040
11020904717,22cyclictest0-21swapper11:17:450
11020904715,23cyclictest0-21swapper12:13:090
11020904714,24cyclictest0-21swapper10:52:290
888224512,19sleep08890-21diskstats07:05:270
1102090457,11cyclictest26652-21irqstats11:41:060
11020904520,15cyclictest11797-21apt-get08:15:180
11020904510,27cyclictest0-21swapper09:57:410
11020904415,22cyclictest0-21swapper10:09:490
11020904412,24cyclictest0-21swapper12:39:000
11020904412,13cyclictest24322-21ntpq11:36:550
11020904410,25cyclictest9335-21kworker/0:109:21:070
1102090435,19cyclictest10375-21df_inode09:15:440
1102090435,11cyclictest8433-21ssh12:06:260
11020904320,16cyclictest0-21swapper09:49:070
11020904312,14cyclictest0-21swapper11:12:350
11020904310,24cyclictest26339-21apt-get07:40:140
38662420,3chrt3868-21missed_timers10:01:140
1102090425,28cyclictest15677-21users10:22:250
1102090425,18cyclictest25491-21ntpq08:41:010
11020904220,17cyclictest0-21swapper09:28:150
11020904211,22cyclictest9538-21aten2.4_rfpower08:11:160
11020904211,22cyclictest0-21swapper10:47:430
1102090418,13cyclictest20587-21ntpq08:31:170
1102090416,26cyclictest23105-21ntpq08:36:190
1102090415,26cyclictest27803-21irqstats08:45:440
11020904116,16cyclictest22189-21apt-get10:35:210
11020904020,15cyclictest18751-21apt-get07:25:240
11020904019,12cyclictest16878-21/usr/sbin/munin08:25:270
11020904018,12cyclictest22262-21ntpq07:30:580
11020904016,16cyclictest738-21ntp_states08:56:160
11020904015,18cyclictest20698-21sleep11:30:520
11020903918,14cyclictest0-21swapper08:50:310
11020903913,17cyclictest0-21swapper07:45:260
11020903813,15cyclictest16219-21apt-get07:20:160
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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