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2026-06-18 - 13:49

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 100 highest latencies:
System rack9slot4s (updated Thu Jun 18, 2026 00:59:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
27352643597,30sleep10-21swapper/119:21:471
29882588490,30sleep00-21swapper/019:23:440
3163996256,3cyclictest5055-21munin-run19:30:000
97962580,8sleep0316399cyclictest23:55:300
69572401,34sleep07115-21fschecks_time23:50:160
316399391,13cyclictest0-21swapper/019:55:220
318102360,5sleep0111rcuc/022:05:020
57342351,31sleep15741-21iostat_ios22:20:201
316399341,13cyclictest81rcu_preempt22:53:060
309572340,8sleep0316399cyclictest20:35:220
309572340,8sleep0316399cyclictest20:35:220
289802341,4sleep129000-21iostat_ios20:30:171
316399331,27cyclictest22722-21/usr/sbin/munin21:40:130
212652331,4sleep12695-21snmpd00:27:071
3164993223,5cyclictest2695-21snmpd22:16:001
316499315,19cyclictest19260-21iostat_ios21:30:201
316499314,20cyclictest1895-21diskstats20:45:141
316399311,4cyclictest81rcu_preempt21:45:410
300952311,5sleep00-21swapper/020:34:480
188212311,5sleep10-21swapper/120:04:511
169992311,4sleep117017-21iostat22:50:191
60192301,5sleep10-21swapper/123:45:291
316499304,19cyclictest11416-21diskstats21:10:151
3164993020,6cyclictest15089-21tr21:20:111
316399309,8cyclictest29784-21cron22:00:010
316399302,15cyclictest9941-21fschecks_count19:40:170
316399301,4cyclictest81rcu_preempt22:31:060
316399301,4cyclictest81rcu_preempt22:06:400
3163993013,13cyclictest20106-21df00:25:130
3163993012,5cyclictest2212-21irqstats20:45:200
3163993010,17cyclictest0-21swapper/023:16:560
295132301,5sleep10-21swapper/121:57:191
251872301,5sleep00-21swapper/000:38:540
160302301,5sleep10-21swapper/122:47:401
92132291,5sleep10-21swapper/119:37:531
65882291,5sleep00-21swapper/022:22:130
3164992922,4cyclictest22-21ksoftirqd/122:10:271
3164992916,10cyclictest22-21ksoftirqd/100:30:271
316399293,19cyclictest4610-21python20:50:270
316399292,13cyclictest16673-21sed00:15:200
316399291,9cyclictest0-21swapper/023:40:240
3163992917,7cyclictest19108-21ntp_kernel_pll_22:55:230
316399291,4cyclictest81rcu_preempt19:52:220
316399291,4cyclictest81rcu_preempt00:51:200
316399291,15cyclictest26899-21fschecks_count20:25:150
3163992911,5cyclictest20684-21hddtemp_smartct23:00:160
315652291,5sleep10-21swapper/120:35:341
315652291,5sleep10-21swapper/120:35:341
293992291,5sleep00-21swapper/023:24:420
287092291,5sleep00-21swapper/000:46:000
260322291,5sleep00-21swapper/020:21:310
252762291,5sleep00-21swapper/023:11:020
24142291,5sleep00-21swapper/023:37:500
203542291,5sleep00-21swapper/020:06:160
192632291,5sleep00-21swapper/000:20:510
192632291,5sleep00-21swapper/000:20:500
185542291,5sleep00-21swapper/020:02:000
156042291,5sleep00-21swapper/000:12:020
155642291,24sleep015680-21timerwakeupswit22:45:280
83772281,5sleep10-21swapper/122:26:181
79422281,5sleep10-21swapper/123:50:381
73972281,5sleep10-21swapper/119:33:291
62492281,4sleep00-21swapper/023:47:290
52662281,5sleep10-21swapper/120:54:381
316499284,18cyclictest7964-21iostat_ios21:00:201
3164992820,5cyclictest31310-21idleruntime-cro23:30:001
316399289,6cyclictest7365-21/usr/sbin/munin21:00:110
316399282,13cyclictest0-21swapper/023:30:110
316399281,15cyclictest11986-21open_inodes21:10:250
3163992811,5cyclictest11565-21gdbus22:16:000
306762281,5sleep10-21swapper/100:51:581
278552281,5sleep10-21swapper/121:54:381
243252281,5sleep00-21swapper/020:18:290
241972281,5sleep10-21swapper/120:17:101
239182281,5sleep10-21swapper/121:42:391
236172281,5sleep10-21swapper/123:08:171
232312281,5sleep00-21swapper/000:33:030
204672281,5sleep10-21swapper/120:07:241
193852281,5sleep10-21swapper/100:22:071
193852281,5sleep10-21swapper/100:22:071
182952281,5sleep10-21swapper/121:27:591
180692281,5sleep00-21swapper/021:25:370
175622281,5sleep10-21swapper/100:17:551
145332281,5sleep10-21swapper/121:18:061
137412281,5sleep10-21swapper/100:07:101
130402281,5sleep00-21swapper/019:48:250
129482281,4sleep10-21swapper/119:47:281
121512281,4sleep10-21swapper/122:36:321
117582281,5sleep00-21swapper/000:01:020
107632281,5sleep00-21swapper/022:35:060
105012281,5sleep10-21swapper/122:33:571
99202271,5sleep10-21swapper/121:05:211
44482271,5sleep10-21swapper/123:43:171
316499274,17cyclictest5763-21diskstats20:55:151
316499274,17cyclictest11698-21users00:00:341
3164992718,6cyclictest14302-21sendmail_mailqu19:50:261
3164992718,5cyclictest24724-21cat00:35:261
3164992717,6cyclictest32332-21pluginstate23:30:251
3164992710,13cyclictest0-21swapper/123:55:121
316399274,8cyclictest3207-21ntpd21:05:240
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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