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2024-09-15 - 05:18

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 Sun Sep 15, 2024 00:44:35)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2348621170,2chrt23488-21load22:56:090
718521160,2chrt7184-21ssh00:23:510
2578721160,3chrt25790-21cut23:00:560
3220321140,2chrt32006-21apt-get19:11:010
1540121120,2chrt15403-21cut23:40:390
3003121080,2chrt30032-21sleep21:11:390
2601521050,2chrt26016-21sleep21:04:540
2063921050,3chrt20640-21sh21:52:260
1155821030,2chrt11559-21modprobe20:35:580
74662890,2sleep07464-21cpu19:25:270
157962880,2sleep015797-21sh22:42:170
202782860,1sleep020280-21ssh23:49:080
290302850,2sleep029033-21sed23:06:090
63072780,2sleep06308-21rm22:25:530
37752760,2sleep03776-21rm23:20:010
47922750,2sleep04794-21sed22:22:230
129062720,2sleep012909-21cut19:35:420
275902610,2sleep027591-21ld00:01:440
34512563,44sleep03462-21switchtime19:16:250
220352553,42sleep022045-21ntp_states20:56:090
70812543,8sleep07082-21diskstats23:25:470
44522544,42sleep04455-21ssh00:19:020
140362542,42sleep0228-21usb-storage22:40:080
320262533,8sleep032031-21ntpq23:11:330
286632533,7sleep028660-21ntpq20:06:110
18742533,42sleep01802-21ssh22:17:120
130892532,7sleep013081-21apt-get20:40:150
96332520,2chrt9537-21ssh23:30:150
210142523,40sleep021000-21ssh22:51:490
3049825112,24sleep030509-21/usr/sbin/munin19:06:010
193362514,7sleep019331-21ntpq20:50:520
99002493,6sleep09904-21ssh21:33:380
31674904921,21cyclictest0-21swapper21:19:020
31674904920,22cyclictest0-21swapper00:32:370
227522490,3sleep022750-21ssh21:56:240
299542480,2sleep029955-21irqrtprio00:06:030
237182480,2chrt23716-21/usr/sbin/munin23:55:360
63632473,36sleep06373-21ntp_states20:26:080
31674904717,22cyclictest0-21swapper00:29:330
143912473,36sleep014394-21ssh23:38:020
31674904617,22cyclictest0-21swapper00:14:190
108692452,8sleep010866-21ssh22:34:000
3167490446,18cyclictest24809-21diskstats22:00:530
31674904415,23cyclictest0-21swapper21:43:180
31674904414,22cyclictest0-21swapper22:12:460
3167490435,9cyclictest27386-21ntpq21:06:130
3167490435,12cyclictest17197-21python320:46:230
3167490435,11cyclictest15286-21perl19:40:380
3167490435,10cyclictest10152-21perl19:30:350
3167490434,10cyclictest3903-21apt-get23:20:160
31674904315,21cyclictest0-21swapper00:37:550
3167490425,9cyclictest22019-21ntpq23:51:430
3167490424,18cyclictest31132-21ntpq20:11:040
31674904220,14cyclictest0-21swapper22:08:440
31674904216,20cyclictest893-21runrttasks21:29:380
31674904215,10cyclictest28604-21diskmemload21:47:510
3167490416,18cyclictest11818-21ntpq21:36:460
3167490414,19cyclictest20848-21ntpq19:50:490
3167490414,11cyclictest24808-21munin-run20:00:050
31674904120,13cyclictest0-21swapper22:47:300
3167490406,14cyclictest2599-21sort20:20:060
3167490405,17cyclictest24832-21sendmail-msp20:00:110
31674904016,18cyclictest1965-21apt-get21:20:310
3167490394,17cyclictest7613-21apt-get20:30:450
31674903914,18cyclictest18303-21/usr/sbin/munin19:45:490
31674903913,19cyclictest0-21swapper20:21:450
3167490388,11cyclictest5693-21sleep19:20:590
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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