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2026-07-21 - 02:48

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #9, 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 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.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 376 highest latencies:
System rack9slot4s (updated Tue Jul 21, 2026 00:59:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
284729912321199,18cyclictest0-21swapper/019:25:110
284739911241115,6cyclictest0-21swapper/119:25:111
270242673626,31sleep00-21swapper/019:20:160
283412464370,29sleep10-21swapper/119:24:101
237842900,5sleep0111rcuc/022:00:260
192132890,9sleep12847399cyclictest00:40:231
112972470,4sleep1201rcuc/122:55:121
28472994023,6cyclictest3-21ksoftirqd/023:02:280
28472993923,6cyclictest3-21ksoftirqd/021:49:360
28472993823,5cyclictest3-21ksoftirqd/023:56:450
28472993822,5cyclictest3-21ksoftirqd/023:14:480
28472993822,5cyclictest3-21ksoftirqd/022:43:170
28472993821,6cyclictest3-21ksoftirqd/000:13:450
9772371,32sleep12695-21snmpd23:52:481
28472993721,6cyclictest3-21ksoftirqd/020:40:050
28472993721,6cyclictest3-21ksoftirqd/019:38:590
28472993620,5cyclictest3-21ksoftirqd/021:25:120
2847299361,7cyclictest0-21swapper/022:08:530
2847299361,22cyclictest16065-21taskset00:31:530
28472993520,5cyclictest3-21ksoftirqd/000:17:370
28472993520,4cyclictest3-21ksoftirqd/019:34:070
28472993519,6cyclictest3-21ksoftirqd/021:50:480
28472993519,6cyclictest3-21ksoftirqd/021:17:480
28472993519,5cyclictest3-21ksoftirqd/021:30:490
28472993518,6cyclictest3-21ksoftirqd/023:06:510
111932351,30sleep011203-21/usr/sbin/munin00:20:170
84892341,3sleep18630-21cut19:55:161
306672341,4sleep130671-21irqstats23:45:231
2847399341,15cyclictest208402cpuspeed_turbos23:20:131
28472993418,6cyclictest3-21ksoftirqd/000:26:340
28472993418,5cyclictest3-21ksoftirqd/020:38:100
149232348,6sleep122-21ksoftirqd/121:37:111
2847299339,5cyclictest26639-21fschecks_count23:35:160
28472993318,5cyclictest3-21ksoftirqd/022:45:420
28472993318,5cyclictest3-21ksoftirqd/022:38:260
28472993318,5cyclictest3-21ksoftirqd/022:29:180
28472993318,5cyclictest3-21ksoftirqd/022:23:160
28472993317,5cyclictest3-21ksoftirqd/000:00:050
28472993218,4cyclictest3-21ksoftirqd/021:05:460
28472993217,5cyclictest3-21ksoftirqd/021:58:240
28472993217,5cyclictest3-21ksoftirqd/020:50:520
28472993216,6cyclictest3-21ksoftirqd/023:19:080
28472993214,5cyclictest14192-21cut20:10:150
28472993211,5cyclictest23933-21munin-run00:55:000
28472993210,8cyclictest40250irq/92-i91523:20:230
162302321,5sleep116279-21users23:05:311
2847399316,4cyclictest81rcu_preempt23:31:101
28473993119,7cyclictest16945-21cut23:10:111
2847299317,20cyclictest25249-21ntpq23:30:250
2847299311,7cyclictest16531-21chrt00:35:110
28472993116,5cyclictest3-21ksoftirqd/023:46:500
28472993116,5cyclictest3-21ksoftirqd/021:21:240
264312311,5sleep10-21swapper/122:09:231
198562310,2sleep10-21swapper/123:15:291
146142311,5sleep10-21swapper/123:02:331
74932301,25sleep17562-21basename22:45:121
72402301,5sleep10-21swapper/122:44:061
67342301,5sleep10-21swapper/100:07:381
2847399305,4cyclictest81rcu_preempt22:12:101
2847399304,4cyclictest81rcu_preempt20:11:221
28473993019,6cyclictest1933-21turbostat.cron21:05:001
28473993016,8cyclictest31428-21diskstats19:30:161
28473993011,15cyclictest242622chrt22:01:201
2847299308,12cyclictest40250irq/92-i91521:40:130
2847299307,12cyclictest28470-21cyclictest19:53:080
2847299306,7cyclictest0-21swapper/020:05:140
28472993016,4cyclictest3-21ksoftirqd/021:14:050
28472993015,5cyclictest3-21ksoftirqd/019:49:330
28472993015,4cyclictest3-21ksoftirqd/020:16:340
28472993014,6cyclictest3-21ksoftirqd/023:52:270
28472993012,6cyclictest12217-21mailstats22:55:280
28472993010,16cyclictest10356-21mailstats22:50:280
224192301,5sleep10-21swapper/121:56:571
174792301,25sleep117542-21sshd21:45:151
113652301,5sleep10-21swapper/121:29:111
96452291,5sleep00-21swapper/019:57:200
47782291,5sleep10-21swapper/100:01:521
296832291,5sleep00-21swapper/023:42:460
2847399295,4cyclictest81rcu_preempt21:44:001
2847399295,4cyclictest81rcu_preempt20:42:331
2847399295,4cyclictest81rcu_preempt20:26:241
2847399295,4cyclictest81rcu_preempt20:02:021
2847399294,4cyclictest81rcu_preempt22:35:441
28473992922,4cyclictest2348-21iostat_ios22:30:201
28473992920,6cyclictest16636-21aten_r4power_vo00:35:111
28473992920,5cyclictest4018-21cat21:10:011
2847399291,4cyclictest81rcu_preempt00:17:231
2847399290,4cyclictest81rcu_preempt00:26:161
2847299297,11cyclictest3-21ksoftirqd/019:43:250
2847299295,19cyclictest1985-21expr22:30:120
2847299293,13cyclictest21607-21/usr/sbin/munin00:45:300
28472992915,4cyclictest3-21ksoftirqd/021:38:030
28472992915,4cyclictest3-21ksoftirqd/020:03:590
2847299291,15cyclictest20743-21/usr/sbin/munin20:25:290
28472992911,5cyclictest11565-21gdbus21:04:330
246742291,5sleep10-21swapper/120:37:101
230912291,24sleep123132-21iostat23:25:201
20692291,5sleep10-21swapper/119:37:541
199382291,5sleep00-21swapper/000:42:580
188982291,5sleep10-21swapper/120:20:351
84212281,4sleep10-21swapper/100:10:401
78892281,5sleep10-21swapper/119:53:371
66212281,5sleep00-21swapper/000:06:260
41722281,5sleep10-21swapper/119:43:591
298632281,5sleep00-21swapper/022:16:020
2847399284,4cyclictest81rcu_preempt22:22:261
2847399284,3cyclictest81rcu_preempt20:07:351
2847399284,18cyclictest27598-21iostat20:45:191
2847399282,18cyclictest1965-21irqstats23:55:191
28473992819,5cyclictest511-21latency22:25:221
2847299285,12cyclictest81rcu_preempt21:00:000
2847299285,12cyclictest81rcu_preempt21:00:000
2847299285,11cyclictest0-21swapper/020:45:200
2847299282,22cyclictest22818-21df23:25:120
2847299282,13cyclictest21964-21irqstats20:30:190
2847299281,7cyclictest27816-21timerwakeupswit22:10:300
236472281,5sleep10-21swapper/100:52:051
230082281,5sleep10-21swapper/120:34:211
218822281,5sleep10-21swapper/100:48:141
172472281,5sleep10-21swapper/120:18:081
129122281,5sleep10-21swapper/121:30:471
93812271,5sleep10-21swapper/121:23:031
73952271,5sleep10-21swapper/121:17:091
60962271,5sleep10-21swapper/119:49:261
2847399273,9cyclictest29489-21iostat_ios20:50:211
2847399273,4cyclictest81rcu_preempt21:51:161
28473992718,5cyclictest27099-21ntp_kernel_pll_23:35:241
28473992717,6cyclictest30249-21cron22:20:011
2847399271,4cyclictest81rcu_preempt23:44:001
28473992712,11cyclictest0-21swapper/120:55:141
28473992712,11cyclictest0-21swapper/120:55:141
28472992711,4cyclictest40250irq/92-i91520:20:280
159612271,5sleep10-21swapper/100:30:481
2847399264,4cyclictest81rcu_preempt22:50:121
2847399262,10cyclictest4572-21hddtemp_smartct21:10:171
2847399252,10cyclictest11186-21df00:20:141
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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