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2026-05-19 - 16:55

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 May 19, 2026 12:59:02)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
23039912401200,29cyclictest15328-21kworker/0:107:25:140
23049911131083,26cyclictest2731-21expr07:25:131
19542462417,30sleep00-21swapper/007:22:030
18792461417,29sleep10-21swapper/107:21:171
1697521090,6sleep0230399cyclictest10:50:290
167232840,4sleep181rcu_preempt08:00:131
119392840,4sleep011940-21unixbench_multi07:45:300
123012460,8sleep1230499cyclictest07:47:511
230499395,30cyclictest0-21swapper/108:10:181
270792350,2sleep027080-21date11:20:010
18932351,5sleep01910-21/usr/sbin/munin08:45:230
41082341,29sleep04267-21unixbench_multi08:50:290
265882331,4sleep026669-21python09:50:260
2304993322,6cyclictest8204-21cron10:30:001
289622321,28sleep02225-21dbus-daemon09:57:050
289622321,28sleep02225-21dbus-daemon09:57:040
244332311,26sleep124489-21fschecks_count08:20:161
230499314,6cyclictest81rcu_preempt07:33:501
2304993121,6cyclictest19486-21cron10:59:591
230399312,15cyclictest18765-21df08:05:110
230399311,26cyclictest23633-21sh09:45:000
75172301,5sleep10-21swapper/111:51:381
4872301,5sleep00-21swapper/010:09:210
44432301,5sleep10-21swapper/108:51:301
323932301,5sleep00-21swapper/011:32:160
260092301,5sleep00-21swapper/008:25:090
257622301,5sleep00-21swapper/008:24:070
237852301,5sleep00-21swapper/008:18:180
230499304,9cyclictest14255-21iostat_ios12:10:211
230499302,10cyclictest997-21df10:10:121
2304993020,5cyclictest29986-21grep12:50:301
230399301,25cyclictest22608-21chrt12:32:010
2303993012,14cyclictest17361-21timerandwakeup09:25:290
223492301,5sleep10-21swapper/109:40:161
169902301,5sleep00-21swapper/012:17:200
81372291,5sleep00-21swapper/010:29:190
41172291,5sleep00-21swapper/011:45:010
37332291,5sleep10-21swapper/111:41:161
307582291,5sleep00-21swapper/010:01:020
293602291,5sleep00-21swapper/008:32:350
281792291,5sleep00-21swapper/012:45:580
275652291,5sleep10-21swapper/108:28:231
230499292,23cyclictest23270-21turbostat.cron11:10:001
2304992918,7cyclictest1542-21tune2fs08:45:161
2304992914,12cyclictest3286-21runrttasks12:35:171
230499291,24cyclictest12318-21sh09:15:001
230399292,15cyclictest0-21swapper/011:40:140
230399292,14cyclictest14819-21/usr/sbin/munin10:45:240
2303992911,6cyclictest8891-21ps11:55:280
230399291,14cyclictest29069-21/usr/sbin/munin11:25:110
230399291,14cyclictest29069-21/usr/sbin/munin11:25:110
19992291,5sleep10-21swapper/111:39:091
138052291,5sleep00-21swapper/010:44:310
138052291,5sleep00-21swapper/010:44:310
116412291,5sleep00-21swapper/010:36:450
115722291,5sleep00-21swapper/012:04:340
97232281,5sleep10-21swapper/110:31:191
77822281,5sleep00-21swapper/011:54:220
316552281,5sleep00-21swapper/008:40:100
286642281,5sleep10-21swapper/111:22:321
262842281,5sleep10-21swapper/112:41:021
245312281,5sleep00-21swapper/012:37:330
236162281,5sleep10-21swapper/108:16:361
230499284,8cyclictest12777-21diskstats09:15:151
2304992814,7cyclictest28132-21iostat_ios09:55:221
2304992814,7cyclictest28132-21iostat_ios09:55:211
230499281,24cyclictest0-21swapper/111:49:201
230399284,5cyclictest5394-21fschecks_count07:30:150
230399281,25cyclictest0-21swapper/011:14:250
230399281,23cyclictest4426-21chrt10:19:570
2303992812,13cyclictest22007-21fschecks_time11:05:180
2303992811,12cyclictest1305-21iostat10:10:170
213892281,5sleep10-21swapper/109:36:341
206512281,5sleep00-21swapper/012:26:110
191062281,5sleep00-21swapper/010:56:040
190712281,5sleep10-21swapper/112:24:151
188302281,5sleep00-21swapper/012:21:480
172932281,5sleep10-21swapper/110:51:461
168312281,5sleep10-21swapper/112:15:441
161112281,5sleep10-21swapper/107:56:471
141742281,5sleep10-21swapper/107:51:081
141552281,3sleep014221-21if_eth012:10:190
138092281,5sleep10-21swapper/110:44:341
138092281,5sleep10-21swapper/110:44:331
131422281,5sleep00-21swapper/012:06:240
101152281,5sleep10-21swapper/109:06:461
100012281,5sleep00-21swapper/010:34:110
94022271,5sleep10-21swapper/111:56:441
82142271,5sleep10-21swapper/109:01:291
61062271,5sleep10-21swapper/110:22:441
43612271,5sleep10-21swapper/110:19:171
272332271,5sleep10-21swapper/109:53:401
2304992714,7cyclictest31899-21iostat_ios10:05:191
2304992711,12cyclictest0-21swapper/111:01:461
230399274,16cyclictest6835-21apt-get07:35:010
2303992719,5cyclictest14229-21sendmail09:20:000
2303992711,12cyclictest7022-21cpuspeed_turbos09:00:130
2303992711,12cyclictest28619-21taskset11:22:020
2303992710,5cyclictest25967-21python12:40:270
2303992710,15cyclictest0-21swapper/007:53:540
2303992710,14cyclictest0-21swapper/009:05:460
2303992710,13cyclictest30235-21taskset12:52:510
209702271,5sleep00-21swapper/011:00:450
179532271,5sleep10-21swapper/109:29:531
120382271,4sleep00-21swapper/009:12:080
63302261,4sleep10-21swapper/108:56:381
251902261,4sleep10-21swapper/109:46:531
230499262,20cyclictest0-21swapper/112:05:271
2304992617,6cyclictest22-21ksoftirqd/112:30:171
2304992617,6cyclictest22-21ksoftirqd/108:42:341
2304992616,6cyclictest22-21ksoftirqd/108:35:281
2304992616,6cyclictest19205-21sort08:05:211
230499261,21cyclictest23758-21grep11:10:161
2304992612,10cyclictest10260-21fschecks_count12:00:171
2304992610,12cyclictest0-21swapper/108:30:271
230399269,5cyclictest23796-21aten_r4power_cu09:45:120
230399269,13cyclictest20434-21aten_r4power_po08:10:130
230399267,5cyclictest0-21swapper/011:37:110
2303992615,8cyclictest3-21ksoftirqd/007:58:360
230399261,22cyclictest18948-21grep09:30:240
230399261,16cyclictest0-21swapper/009:20:060
230399261,13cyclictest18238-21taskset08:04:070
2303992610,5cyclictest8887-21runrttasks07:40:060
209532261,5sleep10-21swapper/112:29:211
312592251,5sleep00-21swapper/008:37:490
230499253,7cyclictest10845-21iostat_ios10:35:221
230499252,20cyclictest0-21swapper/110:04:121
2304992517,5cyclictest7203-21cpuspeed_turbos07:35:131
2304992516,5cyclictest18884-21needreboot09:30:231
230499251,21cyclictest0-21swapper/111:25:121
230499251,21cyclictest0-21swapper/111:25:121
230399251,13cyclictest0-21swapper/010:24:260
230499248,4cyclictest14977-21iostat_ios09:20:181
230499243,16cyclictest14020-21/usr/sbin/munin10:45:321
2304992415,6cyclictest9490-21runrttasks07:40:181
230499241,10cyclictest0-21swapper/111:30:141
2303992414,6cyclictest1974-21lldpad08:57:540
230399241,21cyclictest0-21swapper/009:38:550
2304992313,5cyclictest25960-21cat11:15:221
230499227,11cyclictest0-21swapper/112:45:221
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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