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2024-09-12 - 10:01

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 Thu Sep 12, 2024 00:44:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2832021230,4chrt28322-21missed_timers21:12:020
1530421200,2chrt15303-21sleep21:46:190
669021180,2chrt6671-21ssh00:25:570
2324721160,2chrt22573-21/usr/sbin/munin22:01:060
2955321140,3chrt29554-21sleep23:10:400
147521140,3chrt1455-21ntpq21:21:460
1355721140,2chrt13559-21sed23:40:120
2237321120,2chrt22369-21grep23:55:490
948221090,3chrt9483-21sleep22:34:390
1468921090,2sleep014691-21sort23:41:180
1312221080,2chrt13123-21sleep00:37:070
1353021060,3chrt13531-21sleep22:41:110
357421050,2chrt3576-21sed23:21:170
649721040,2chrt6496-21awk20:30:260
1601821030,2chrt16019-21sleep20:49:000
1003321030,2chrt10034-21sleep19:33:360
490821010,2chrt4909-21sleep19:23:220
2625721000,2chrt26258-21sleep21:08:260
239692970,2chrt23970-21sleep21:04:270
110742940,2sleep011076-21cat22:36:420
308142870,2sleep030816-21ls00:10:560
16332840,2sleep01634-21tune2fs20:20:350
97432830,2chrt9723-21ntpq21:36:270
244922830,2sleep024495-21cut23:01:070
201012790,4sleep020103-21grep21:55:380
300942768,54sleep030129-21munin-run19:10:000
185702620,1sleep018571-21cut22:50:480
169192570,1sleep016921-21mailstats22:47:090
49482550,2sleep04950-21run-parts00:22:180
299892530,2sleep029992-21switchtime22:12:150
30167904919,22cyclictest0-21swapper23:45:050
30167904818,22cyclictest0-21swapper23:34:240
30167904813,19cyclictest3714-21ps21:26:060
191632480,3chrt19161-21/usr/sbin/munin19:50:540
3016790477,11cyclictest18099-21ntpq21:51:210
3016790475,12cyclictest4634-21diskstats22:25:490
30167904718,21cyclictest0-21swapper23:54:570
93862460,3chrt9384-21/usr/sbin/munin20:35:410
73892460,2sleep07419-21sh21:32:180
30167904617,21cyclictest0-21swapper22:24:340
30167904616,22cyclictest0-21swapper00:19:210
30167904519,16cyclictest25446-21snmpd23:00:110
3016790446,17cyclictest26040-21df22:05:580
30167904419,17cyclictest28801-21ntp_states00:06:570
30167904416,21cyclictest0-21swapper00:32:320
30167904415,22cyclictest0-21swapper23:09:080
3016790436,18cyclictest6661-21ntp_states19:26:160
3016790435,11cyclictest31356-21ntpq19:11:010
30167904316,9cyclictest26662-21diskmemload23:26:590
30167904315,21cyclictest0-21swapper20:11:250
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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