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2024-11-25 - 05:11

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 50 highest latencies:
System rackfslot4s.osadl.org (updated Mon Nov 25, 2024 00:44:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2098221140,2sleep021015-21cat00:11:030
2074821090,2chrt20745-21ls21:12:300
2705721070,2chrt27058-21sleep21:24:430
436621060,2chrt4367-21sendmail-msp00:40:010
2785621060,2chrt27852-21ps23:22:530
429021000,3chrt4293-21cut20:41:100
206452950,2sleep020648-21cut22:11:120
125812940,2sleep012582-21tune2fs23:55:510
296032920,2sleep029605-21awk20:25:580
295032920,2sleep029504-21ssh22:26:440
64572900,3chrt4601-21apt-get23:42:540
269882900,1sleep026991-21irqrtprio00:21:460
224032880,1sleep022404-21rm21:16:000
12972880,1sleep01298-21aten2.4_rfpower20:35:260
10952830,2sleep01097-21cat19:30:480
64392820,2chrt6425-21ntpq19:41:310
22367907817,19cyclictest16783-21awk22:05:000
22367907810,19cyclictest13878-21apt-get21:00:120
147592750,2sleep014756-21sshd22:59:290
2236790747,18cyclictest15596-21df23:01:170
325762720,2sleep032577-21collect200:31:270
2236790726,10cyclictest23557-21memory22:16:100
22367907213,23cyclictest0-21swapper22:32:450
302212710,1sleep030219-21aten2.4_rfpower21:30:340
22367906714,21cyclictest0-21swapper00:19:050
235762610,1sleep023578-21awk19:11:040
127012600,1sleep012731-21idleruntime-cro19:55:010
67852500,2chrt6783-21/usr/sbin/munin22:45:120
206982500,3sleep020694-21sshd23:10:310
22367904919,22cyclictest0-21swapper22:08:470
72792480,2chrt7264-21ntpq20:45:560
22367904819,22cyclictest0-21swapper22:52:130
139282480,2chrt13926-21/usr/sbin/munin19:56:350
5102470,2chrt508-21ld23:31:450
22367904718,22cyclictest0-21swapper23:45:220
22367904717,23cyclictest0-21swapper00:27:250
22367904717,22cyclictest0-21swapper23:19:020
22367904717,21cyclictest0-21swapper00:03:110
11982470,2sleep01202-21irqrtprio21:36:090
244702460,3chrt24471-21sh20:16:190
22367904618,19cyclictest0-21swapper21:49:120
22367904617,21cyclictest0-21swapper21:27:320
22367904517,21cyclictest0-21swapper23:08:120
2236790446,18cyclictest11612-21df20:55:260
2236790446,11cyclictest26113-21df22:21:410
22367904420,16cyclictest0-21swapper23:52:400
2014624410,18sleep020196-21df19:05:220
317992430,3chrt31800-21sh19:27:120
2236790437,20cyclictest4135-21sshd22:40:300
2236790435,28cyclictest26000-21ntpq19:15:530
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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