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2026-04-25 - 12:56

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #a, slot #5

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 here to display the system's profile data or here to proceed to next system.
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 rackaslot5s.osadl.org (updated Sat Apr 25, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811010,0rcu_preempt3-21ksoftirqd/000:26:170
81970,0rcu_preempt3-21ksoftirqd/022:22:060
81940,0rcu_preempt3-21ksoftirqd/022:42:480
81820,0rcu_preempt19-21ksoftirqd/123:08:361
81750,0rcu_preempt3-21ksoftirqd/022:03:510
81750,0rcu_preempt24574-21apt-get19:08:310
81740,0rcu_preempt3-21ksoftirqd/022:25:210
81730,0rcu_preempt3-21ksoftirqd/023:30:150
81730,0rcu_preempt3-21ksoftirqd/023:04:260
81730,0rcu_preempt0-21swapper/000:34:260
81720,0rcu_preempt3-21ksoftirqd/021:10:100
81720,0rcu_preempt3-21ksoftirqd/000:18:310
81720,0rcu_preempt19-21ksoftirqd/121:53:321
81710,0rcu_preempt3-21ksoftirqd/023:09:000
81710,0rcu_preempt3-21ksoftirqd/021:43:580
81710,0rcu_preempt3-21ksoftirqd/020:33:430
81700,0rcu_preempt9464-1kworker/0:0H21:23:370
81700,0rcu_preempt5315-21apt-get19:48:310
81700,0rcu_preempt21735-21apt-get20:38:300
81700,0rcu_preempt19-21ksoftirqd/122:55:411
81700,0rcu_preempt17778-21apt-get23:38:320
81690,0rcu_preempt3-21ksoftirqd/021:29:340
81680,0rcu_preempt3-21ksoftirqd/000:03:330
81680,0rcu_preempt13764-21ssh23:33:470
81670,0rcu_preempt3-21ksoftirqd/022:57:220
81670,0rcu_preempt19-21ksoftirqd/100:18:441
81660,0rcu_preempt3-21ksoftirqd/020:08:490
81650,0rcu_preempt23961-21ssh21:33:310
81640,0rcu_preempt3-21ksoftirqd/021:13:560
81640,0rcu_preempt30634-21df_abs23:18:360
81640,0rcu_preempt16542-21php-cgi21:58:390
81630,0rcu_preempt8869-21php-cgi19:58:390
81630,0rcu_preempt8211-21ping20:18:450
81630,0rcu_preempt3719-21ntpdc23:23:450
81630,0rcu_preempt3-21ksoftirqd/019:13:400
81630,0rcu_preempt19-21ksoftirqd/119:58:371
81630,0rcu_preempt19-21ksoftirqd/100:13:431
81620,0rcu_preempt851-21rngd21:54:550
81620,0rcu_preempt5372-21diskstats23:58:360
81620,0rcu_preempt5372-21diskstats23:58:360
81620,0rcu_preempt31430-21diskmemload21:18:210
81620,0rcu_preempt19-21ksoftirqd/122:48:381
81620,0rcu_preempt19-21ksoftirqd/122:08:421
81610,0rcu_preempt9771-1kworker/0:3H20:03:510
81610,0rcu_preempt3-21ksoftirqd/020:13:480
81610,0rcu_preempt19-21ksoftirqd/121:31:091
13250610,0irq/301-480200015237-21df_inode00:08:360
81600,0rcu_preempt3-21ksoftirqd/022:48:310
81600,0rcu_preempt3-21ksoftirqd/022:11:240
81600,0rcu_preempt30126-21df_abs21:03:340
81600,0rcu_preempt2352-21apt-get00:28:310
81580,0rcu_preempt3-21ksoftirqd/023:48:410
81580,0rcu_preempt3-21ksoftirqd/023:48:410
81580,0rcu_preempt19-21ksoftirqd/122:58:411
81580,0rcu_preempt19-21ksoftirqd/100:27:441
81570,0rcu_preempt3-21ksoftirqd/023:43:400
81570,0rcu_preempt3-21ksoftirqd/022:28:370
81560,0rcu_preempt3-21ksoftirqd/022:13:460
81560,0rcu_preempt3-21ksoftirqd/000:15:180
81560,0rcu_preempt19-21ksoftirqd/119:18:231
81550,0rcu_preempt8211-21ping20:28:400
81550,0rcu_preempt28261-21apt-get22:43:350
81550,0rcu_preempt19-21ksoftirqd/121:58:381
24429995521,0cyclictest937-1kworker/0:2H22:58:350
81540,0rcu_preempt3-21ksoftirqd/023:53:560
81540,0rcu_preempt3-21ksoftirqd/022:37:290
81540,0rcu_preempt3-21ksoftirqd/020:48:310
81540,0rcu_preempt24428-21cyclictest21:48:480
81540,0rcu_preempt19-21ksoftirqd/123:16:331
81540,0rcu_preempt19-21ksoftirqd/121:46:471
81530,0rcu_preempt3-21ksoftirqd/020:58:470
81530,0rcu_preempt3-21ksoftirqd/019:53:490
81530,0rcu_preempt28913-21apt-get21:38:330
81530,0rcu_preempt26180-21sendmail-mta23:13:450
81530,0rcu_preempt19-21ksoftirqd/122:18:441
24429995215,0cyclictest0-21swapper/020:53:320
81510,0rcu_preempt28509-21ps23:48:471
81510,0rcu_preempt28509-21ps23:48:471
81510,0rcu_preempt19-21ksoftirqd/123:56:161
81510,0rcu_preempt19-21ksoftirqd/123:43:381
24430995110,0cyclictest1470-21runrttasks21:03:181
81500,0rcu_preempt19-21ksoftirqd/123:06:281
81500,0rcu_preempt19-21ksoftirqd/122:15:361
81490,0rcu_preempt19-21ksoftirqd/122:28:481
10050490,0irq/346-484840010430-21ssh21:52:371
81480,0rcu_preempt3-21ksoftirqd/020:23:430
2443099488,0cyclictest31430-21diskmemload23:37:301
24430994812,0cyclictest10050irq/346-484840000:11:251
24430994810,0cyclictest5447-1kworker/1:1H23:28:311
81470,0rcu_preempt3-21ksoftirqd/020:43:430
81470,0rcu_preempt19-21ksoftirqd/123:20:291
81470,0rcu_preempt19-21ksoftirqd/122:43:361
2443099476,0cyclictest21137-21ssh22:03:331
24430994711,0cyclictest9287-21aten_rapower_vo21:18:311
24430994710,0cyclictest32560-21munin-node1
24429994724,0cyclictest27709-21ping19:43:410
24429994717,0cyclictest27709-21ping19:33:370
24429994713,0cyclictest27709-21ping19:18:440
2443099466,0cyclictest5115-21ssh23:58:311
2443099466,0cyclictest5115-21ssh23:58:311
2443099463,0cyclictest28938-21ssh21:38:341
2443099463,0cyclictest14140-21ssh21:23:321
24430994612,0cyclictest0-21swapper/100:34:061
2443099459,0cyclictest15900-21proc_pri20:18:471
2443099455,0cyclictest24012-21ssh22:38:451
2443099455,0cyclictest19421-1kworker/1:1H21:33:331
24429994521,0cyclictest27709-21ping19:28:310
24429994521,0cyclictest27709-21ping19:23:320
24429994520,0cyclictest27709-21ping19:38:330
81440,0rcu_preempt31430-21diskmemload22:36:551
2443099449,0cyclictest3240-21fschecks_time23:23:381
2443099448,0cyclictest5737-21runrttasks21:14:101
2443099446,0cyclictest10322-21ssh00:03:371
10050440,0irq/346-484840022432-1kworker/0:4H19:03:370
10050440,0irq/346-484840022432-1kworker/0:4H19:03:370
81430,0rcu_preempt3192-1kworker/1:1H19:46:181
2443099438,0cyclictest23686-21if_can020:43:401
2443099436,0cyclictest9266-21ntp_kernel_pll_22:23:451
2443099436,0cyclictest17784-21ssh23:38:331
2443099434,0cyclictest0-21swapper/120:03:321
2443099433,0cyclictest0-21swapper/100:29:211
2443099432,0cyclictest0-21swapper/120:28:331
81420,0rcu_preempt19-21ksoftirqd/119:04:481
81420,0rcu_preempt19-21ksoftirqd/119:04:481
2443099427,0cyclictest12521-21ntpdc20:08:461
24430994211,0cyclictest0-21swapper/120:33:381
24430994210,0cyclictest1470-21runrttasks20:58:001
81410,0rcu_preempt19-21ksoftirqd/119:38:211
2443099417,0cyclictest851-21rngd20:38:321
2443099417,0cyclictest16343-1kworker/1:2H20:23:511
2443099417,0cyclictest14716-21chrt20:15:211
2443099413,0cyclictest0-21swapper/120:48:321
24430994111,0cyclictest24746-21df19:08:331
24430994111,0cyclictest1470-21runrttasks19:14:021
81400,0rcu_preempt27709-21ping19:31:551
81400,0rcu_preempt19-21ksoftirqd/119:38:581
81390,0rcu_preempt19-21ksoftirqd/121:03:331
81390,0rcu_preempt19-21ksoftirqd/119:48:421
2443099392,0cyclictest8007-21runrttasks19:53:501
24430993910,0cyclictest29966-21if_eth219:23:431
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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