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2026-10-01 - 18:58

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 all highest latencies:
System rack9slot4s (updated Sat Sep 26, 2026 00:59:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
311719911231102,17cyclictest31608-21diskstats19:25:141
308552586539,32sleep00-21swapper/019:22:130
310062487443,29sleep10-21swapper/119:23:511
3117099125114,8cyclictest0-21swapper/019:25:140
153862980,5sleep041ktimersoftd/020:05:210
121452850,9sleep13117199cyclictest19:55:281
45232760,3sleep0111rcuc/023:55:150
3117199638,6cyclictest0-21swapper/120:09:091
31171996014,7cyclictest22-21ksoftirqd/122:40:201
31171995011,9cyclictest16948-21fschecks_time20:10:161
31171994410,6cyclictest22-21ksoftirqd/121:32:071
31171994016,8cyclictest22-21ksoftirqd/121:14:321
3117099406,14cyclictest2225-21dbus-daemon20:55:330
240172400,2sleep024015-21cat20:30:010
6622391,4sleep0757-21aten_r4power_vo22:20:110
31171993916,7cyclictest22-21ksoftirqd/121:52:511
31171993817,7cyclictest22-21ksoftirqd/121:01:591
31171993816,7cyclictest22-21ksoftirqd/121:58:581
31171993811,8cyclictest1100-21aten_r4power_vo20:55:131
31170993812,7cyclictest13692-21/usr/sbin/munin21:25:290
258892381,32sleep025899-21/usr/sbin/munin22:00:150
31171993715,7cyclictest22-21ksoftirqd/120:36:411
3117099372,15cyclictest20792-21perl20:20:170
3117099372,14cyclictest30930-21taskset22:13:420
3117099371,17cyclictest4564-21grep19:35:270
3117099371,15cyclictest22058-21taskset21:50:130
31170993711,11cyclictest12455-21fschecks_time22:50:150
31171993615,7cyclictest22-21ksoftirqd/122:28:461
31171993614,7cyclictest22-21ksoftirqd/121:18:001
3117099362,6cyclictest3286-21runrttasks23:02:360
3117099362,14cyclictest26806-21taskset23:28:360
3117099362,14cyclictest2355-21plymouth19:30:270
3117099361,16cyclictest27434-21taskset20:37:490
3117099361,14cyclictest23425-21cut23:20:110
31170993610,6cyclictest28753-21runrttasks23:34:200
31171993513,8cyclictest22-21ksoftirqd/119:39:541
31171993512,12cyclictest5176-21df21:05:141
31171993511,7cyclictest5040-21which22:30:221
3117099351,29cyclictest10111-21diskstats00:10:150
3117099351,15cyclictest96042chrt22:40:450
3117099351,14cyclictest16840-21taskset00:26:300
3117199348,9cyclictest2225-21dbus-daemon22:36:381
3117199341,8cyclictest22185-21/usr/sbin/munin20:25:171
31171993412,7cyclictest22-21ksoftirqd/123:54:421
3117099341,15cyclictest13878-21chrt00:20:120
3117099341,13cyclictest31288-21grep23:40:150
240842341,29sleep123352-21/usr/sbin/munin23:20:221
3117199331,10cyclictest10735-21munin-run19:54:591
3117099331,6cyclictest743-21chrt23:45:170
3117099331,27cyclictest3810-21ntp_kernel_err21:00:250
135462331,28sleep113687-21users21:25:291
3117199329,8cyclictest22-21ksoftirqd/120:16:021
3117199323,6cyclictest0-21swapper/120:44:061
3117199323,26cyclictest0-21swapper/122:20:191
3117199321,9cyclictest31844-21cat23:40:251
3117199319,7cyclictest22-21ksoftirqd/100:45:231
3117199319,7cyclictest22-21ksoftirqd/100:45:221
3117199319,6cyclictest0-21swapper/100:26:141
3117199319,5cyclictest0-21swapper/121:40:221
3117199317,7cyclictest16200-21wget21:35:101
3117199312,9cyclictest13876-21df00:20:131
3117199312,8cyclictest29866-21grep23:35:251
3117199312,11cyclictest7729-21iostat_ios19:45:191
31171993110,6cyclictest22-21ksoftirqd/123:04:531
3117099319,18cyclictest14096-21taskset20:00:540
31170993119,9cyclictest12144-21users19:55:280
3117099311,6cyclictest19784-21chrt20:16:300
3117199308,8cyclictest22-21ksoftirqd/122:05:301
3117199308,8cyclictest14643-21kworker/1:122:55:491
3117199307,7cyclictest12940-21cpuspeed_turbos20:00:121
3117199303,10cyclictest0-21swapper/123:45:161
3117199302,9cyclictest20773-21perl20:20:151
3117199302,9cyclictest12518-21ntp_states00:15:231
3117199302,8cyclictest20923-21turbostat.cron00:39:551
3117199302,8cyclictest1799-21fschecks_time19:30:161
3117199302,14cyclictest20177-21iostat_ios23:10:201
3117199301,8cyclictest9663-21pidof00:10:001
3117199301,17cyclictest24201-21kworker/1:320:50:011
3117199301,16cyclictest0-21swapper/122:46:171
3117099306,22cyclictest0-21swapper/021:43:570
31170993020,5cyclictest31607-21wget20:50:090
31170993019,6cyclictest5280-21aten_r4power_cu19:40:110
31170993014,12cyclictest29236-21wc22:10:000
192482301,5sleep10-21swapper/123:08:131
3117199299,5cyclictest0-21swapper/100:53:011
3117199298,10cyclictest5423-21sed23:55:291
3117199292,8cyclictest10417-21irqstats00:10:211
3117199292,13cyclictest21613-21hddtemp_smartct00:40:171
3117199292,13cyclictest17629-21df00:30:151
3117199291,7cyclictest31785-21if_eth022:15:191
3117199291,16cyclictest6520-21users19:40:291
3117099294,18cyclictest20240-21diskstats21:45:130
3117099291,7cyclictest9180-21sed00:05:310
292042291,5sleep00-21swapper/020:41:310
187232291,5sleep00-21swapper/000:31:340
146142291,4sleep00-21swapper/022:55:220
129822291,5sleep00-21swapper/000:15:380
118892291,5sleep00-21swapper/022:49:590
106022291,5sleep00-21swapper/019:53:500
99472281,5sleep00-21swapper/021:15:450
316192280,4sleep1211ktimersoftd/120:50:091
3117199284,9cyclictest12657-21iostat_ios22:50:191
3117199281,9cyclictest3286-21runrttasks23:33:151
3117199281,9cyclictest25434-21grep23:25:121
3117199281,8cyclictest29779-21fschecks_time22:10:171
3117199281,14cyclictest20237-21df_inode21:45:121
3117099288,5cyclictest18935-21unixbench_singl23:05:290
31170992815,7cyclictest5186-21diskstats21:05:140
31170992810,14cyclictest230892chrt23:19:090
306002281,5sleep00-21swapper/023:39:010
243132281,5sleep00-21swapper/000:45:310
243132281,5sleep00-21swapper/000:45:310
159372281,5sleep00-21swapper/021:34:130
119982281,5sleep00-21swapper/021:22:140
75232278,8sleep122-21ksoftirqd/100:02:221
40462271,5sleep00-21swapper/022:26:410
3117199271,7cyclictest24668-21kernelversion20:30:181
3117199271,7cyclictest11681-21expr21:20:281
3117099272,4cyclictest81rcu_preempt20:10:150
31170992717,6cyclictest6941-21ls22:35:180
3117099271,5cyclictest6351-21ls22:35:010
3117099271,5cyclictest3286-21runrttasks23:51:000
265152271,5sleep00-21swapper/000:53:560
255842271,5sleep10-21swapper/122:00:061
255672271,5sleep00-21swapper/020:32:560
3117199261,8cyclictest22087-21cut23:15:201
31170992618,5cyclictest24160-21fschecks_time21:55:160
3117099261,6cyclictest31502-21latency_hist20:50:000
3117099261,4cyclictest81rcu_preempt21:14:320
194802260,10sleep03117099cyclictest00:35:120
169662261,5sleep00-21swapper/021:35:230
74692251,5sleep00-21swapper/000:01:520
3117099258,13cyclictest0-21swapper/019:47:170
31170992516,5cyclictest22290-21unixbench_multi00:40:290
31170992515,6cyclictest32569-21sshd22:16:100
3117099238,12cyclictest19982-21uniq23:10:160
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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