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2025-03-18 - 05:04

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 Tue Mar 18, 2025 00:45:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1660421190,3chrt16606-21aten2.4_rfpower20:40:520
2249721180,2chrt30278-21diskmemload23:08:320
2885821160,2chrt28859-21cpu20:00:520
152721160,3chrt793-21/usr/sbin/munin21:16:040
1139121160,2chrt11392-21sleep22:45:040
2418621150,4chrt23235-21sendmail-msp22:02:010
2866421140,3chrt28646-21ntpq22:11:170
2109121140,3chrt21092-21ntpq19:43:090
2806421120,3chrt28065-21sleep23:18:330
230221090,2chrt2298-21ntpq20:11:240
2054321090,2chrt20544-21ssh00:10:560
2217221080,2chrt22173-21sleep19:45:350
1230821060,2chrt12309-21sleep20:31:080
3105021030,3chrt31051-21sh22:16:030
2540521020,2chrt25406-21sleep20:56:390
592121010,2chrt5922-21sh19:13:200
2328521000,2sleep023286-21latency_hist22:00:070
80582940,2sleep08056-21smart_sda20:23:430
175952920,2sleep017596-21rm00:03:550
37232890,2sleep03726-21grep23:35:530
294012700,1sleep029402-21fschecks_count23:21:520
122632670,2sleep012265-21irqrtprio19:25:440
323232590,1sleep032325-21grep20:06:230
41292557,7sleep011-21ksoftirqd/021:21:180
15442550,2sleep01545-21if_can022:22:160
271882530,3chrt27186-21/usr/sbin/munin21:01:360
148902530,2chrt14888-21/usr/sbin/munin21:43:030
13022532,42sleep01306-21ntpq00:36:360
66242510,3chrt6621-21/usr/sbin/munin23:41:230
135072510,2sleep013509-21sed21:40:120
184622502,39sleep018466-21ssh22:59:000
160112502,41sleep016027-21munin-run22:55:020
3832904919,22cyclictest0-21swapper22:39:010
3832904918,23cyclictest0-21swapper23:47:280
263862490,2sleep026387-21fschecks_time19:55:360
191302492,40sleep09693-1kworker/0:1H23:00:510
3832904818,23cyclictest0-21swapper21:29:120
309012482,6sleep030894-21ntpq00:31:230
3832904718,22cyclictest0-21swapper21:46:440
3832904618,21cyclictest0-21swapper23:53:110
3832904616,12cyclictest9052-21/usr/sbin/munin19:21:180
3832904615,22cyclictest0-21swapper00:19:410
3832904521,15cyclictest25446-21snmpd00:24:520
141724513,18sleep01399-21apt-get19:05:190
3832904419,17cyclictest19666-21ssh00:09:340
3832904416,22cyclictest0-21swapper22:08:590
3832904416,21cyclictest0-21swapper23:26:440
3832904414,21cyclictest0-21swapper22:28:310
3832904411,23cyclictest0-21swapper23:30:050
383290435,20cyclictest14299-21ssh23:56:400
3832904315,20cyclictest0-21swapper22:33:320
3832904315,20cyclictest0-21swapper21:54:140
3832904313,22cyclictest0-21swapper22:48:330
383290425,29cyclictest32677-21sshd21:13:440
383290424,19cyclictest14040-21df20:35:290
3832904211,25cyclictest19231-21munin-run19:40:070
383290418,23cyclictest26269-21sendmail-msp21:05:150
383290416,11cyclictest8203-21ssh21:31:010
3832904119,9cyclictest13916-21apt-get19:30:590
3832904119,15cyclictest0-21swapper23:12:480
383290406,9cyclictest4615-21ntpq20:15:550
383290405,9cyclictest7488-21ntpq19:15:570
383290404,18cyclictest19613-21irqstats20:45:450
383290404,11cyclictest28188-21users00:25:310
3832904013,9cyclictest9352-21irqrtprio20:25:440
383290395,27cyclictest22827-21users20:51:310
3832903813,19cyclictest24335-21missed_timers19:50:450
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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