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2025-07-04 - 09:44

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 Fri Jul 04, 2025 00:44:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2284121300,2sleep022843-21vmstat20:01:320
1860421180,2chrt18600-21ntpq21:56:530
2176421170,3chrt21765-21latency_hist00:00:060
1224221160,3chrt12241-21/usr/sbin/munin23:42:090
780221120,2chrt7803-21sleep00:32:160
1089221030,2chrt10893-21sleep20:41:400
51592990,2chrt5160-21sleep19:27:350
158242960,1sleep015827-21grep22:50:380
324382940,1sleep032442-21sed20:20:440
23922910,2sleep02391-21sort23:25:050
122982910,3sleep012300-21grep20:45:410
2655328510,19sleep026532-21ntp_states19:05:540
71362820,2sleep07137-21ld19:31:230
95112790,2sleep09509-21hddtemp_smartct00:35:570
255992790,2sleep025600-21rm23:07:230
252942780,2sleep025299-21tr21:11:090
62272750,1sleep06228-21hostname21:35:360
111422750,2sleep011145-21tail19:40:260
171862700,2sleep017188-21sed21:55:050
214612690,2sleep021462-21uname22:02:000
316682680,1sleep031666-21open_inodes21:22:160
49902660,2sleep04991-21sh23:29:520
98632640,3chrt9861-21/usr/sbin/munin21:41:130
148072582,6sleep014820-21ntpq23:46:430
1538925710,7sleep015433-21users19:47:210
50962567,8sleep04274-21/usr/sbin/munin20:30:470
139982553,41sleep013994-21ntpq22:46:380
286712523,8sleep028668-21ntpq00:11:500
87572512,39sleep08762-21diskstats19:35:310
284382513,7sleep028486-21perl19:10:370
169652510,2chrt16917-21apt-get20:55:240
77712500,1sleep07772-21ssh23:34:560
27906905021,22cyclictest0-21swapper00:19:170
155752503,6sleep015577-21ntp_states20:51:180
15352502,39sleep01544-21ssh22:25:020
112332500,3sleep011227-21ssh22:41:360
46922490,3chrt4690-21/usr/sbin/munin22:30:350
122262490,2sleep012227-21tune2fs21:45:540
27906904818,23cyclictest0-21swapper22:19:350
27906904817,22cyclictest0-21swapper23:53:490
77542473,7sleep07760-21hddtemp_smartct22:35:530
2790690465,11cyclictest27788-21ssh23:11:350
27906904618,22cyclictest0-21swapper00:09:530
27906904617,22cyclictest0-21swapper22:08:240
27906904616,23cyclictest0-21swapper21:18:570
302802453,35sleep030281-21sleep23:16:070
27906904520,18cyclictest26066-21telnet22:10:500
27906904518,20cyclictest0-21swapper21:29:280
27906904517,22cyclictest0-21swapper22:57:370
10402455,33sleep0888-21apt-get19:20:540
27906904414,23cyclictest0-21swapper23:02:510
27906904414,12cyclictest0-21swapper20:13:330
2790690424,19cyclictest859-21snmpd20:38:270
27906904220,14cyclictest0-21swapper00:22:300
27906904219,17cyclictest24339-21kworker/u2:000:01:360
27906904210,15cyclictest0-21swapper21:33:290
2790690414,18cyclictest30859-21df_inode19:15:300
2790690414,18cyclictest10278-21ssh23:39:090
2790690414,11cyclictest26243-21http20:10:040
2790690414,10cyclictest23116-21ntp_states21:06:120
27906904118,15cyclictest0-21swapper00:28:220
27906904113,16cyclictest1675-21/usr/sbin/munin22:25:350
27906904014,10cyclictest20264-21users19:56:280
27906903919,13cyclictest0-21swapper21:00:300
2790690384,9cyclictest16553-21df19:50:280
2790690383,28cyclictest30082-21ntpq20:15:530
27906903814,18cyclictest2097-21awk20:25:340
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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