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2026-08-14 - 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 376 highest latencies:
System rack9slot4s (updated Fri Aug 14, 2026 00:59:02)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
67279911871159,25cyclictest0-21swapper/019:27:310
66152581518,48sleep10-21swapper/119:24:221
64402550503,31sleep00-21swapper/019:22:310
672899223214,6cyclictest0-21swapper/119:27:311
3099421360,8sleep1672899cyclictest21:50:331
6727996013,6cyclictest26152-21munin-run20:15:010
672799564,8cyclictest12739-21diskstats22:30:150
672799563,7cyclictest27819-21memory00:35:240
672799562,15cyclictest21117-21/usr/sbin/munin21:25:260
672799532,23cyclictest16818-21awk00:05:310
672799522,17cyclictest0-21swapper/021:39:460
672799521,13cyclictest4387-21cron23:35:000
672799521,13cyclictest4387-21cron23:34:590
6727995116,6cyclictest17209-21diskstats19:50:140
672799492,17cyclictest0-21swapper/020:46:220
672799482,17cyclictest24398-21python00:25:300
47692460,5sleep04768-21cut23:35:120
672799396,19cyclictest0-21swapper/023:51:180
6727993915,5cyclictest24183-21grep23:00:150
6728993614,8cyclictest25469-21munin-plugin-st23:05:001
280882331,28sleep128092-21irqstats23:10:211
672899324,5cyclictest81rcu_preempt19:51:351
672799322,17cyclictest0-21swapper/022:24:340
6727993211,8cyclictest8868-21munin-plugin-st20:55:010
6727993210,5cyclictest19943-21timerwakeupswit19:55:290
672899319,8cyclictest16766-21runrttasks19:50:001
672899316,13cyclictest40250irq/92-i91523:35:001
672899316,13cyclictest40250irq/92-i91523:34:591
6728993117,8cyclictest18688-21iostat_ios22:45:211
672799311,18cyclictest0-21swapper/000:10:180
38302310,3sleep0111rcuc/022:05:230
204382311,4sleep119607-21/usr/sbin/munin00:15:281
204382311,4sleep119607-21/usr/sbin/munin00:15:271
200972311,5sleep10-21swapper/119:55:521
672899305,4cyclictest81rcu_preempt20:30:361
672899301,17cyclictest26989-21sensors21:40:291
672799304,12cyclictest32389-21timerwakeupswit23:20:280
6727993012,6cyclictest400-21users21:55:310
672799301,20cyclictest0-21swapper/000:21:020
261922301,26sleep026270-21python00:30:280
259462301,5sleep10-21swapper/120:12:581
176572301,5sleep10-21swapper/122:42:131
176572301,5sleep10-21swapper/122:42:131
139722301,5sleep10-21swapper/100:00:071
96672291,5sleep10-21swapper/123:46:091
672899295,4cyclictest81rcu_preempt00:12:251
6728992920,5cyclictest319-21unixbench_multi21:55:321
672899291,7cyclictest30368-21df_inode20:25:141
672899291,4cyclictest81rcu_preempt23:53:231
6728992911,5cyclictest40250irq/92-i91519:30:231
672799299,5cyclictest31458-21munin-run21:55:000
672799296,11cyclictest0-21swapper/019:40:360
672799292,15cyclictest0-21swapper/020:08:440
672799292,14cyclictest23043-21/usr/sbin/munin21:30:280
672799292,14cyclictest13093-21python23:55:250
672799291,4cyclictest81rcu_preempt22:51:560
672799291,18cyclictest0-21swapper/019:30:020
672799291,16cyclictest15341-21/usr/sbin/munin19:45:160
6727992911,5cyclictest15366-21seq21:10:220
672799291,14cyclictest17925-21cron22:45:000
672799291,14cyclictest17925-21cron22:45:000
6727992910,7cyclictest0-21swapper/022:13:050
276262291,5sleep10-21swapper/120:15:571
237972291,5sleep10-21swapper/121:33:491
20802291,25sleep12179-21nfs4_client20:35:241
20132291,5sleep10-21swapper/123:26:001
144752291,5sleep10-21swapper/119:40:541
139102291,5sleep10-21swapper/122:32:291
126122291,5sleep00-21swapper/021:04:500
101712291,5sleep10-21swapper/122:22:391
68462281,5sleep10-21swapper/120:48:391
672899285,4cyclictest81rcu_preempt21:38:351
672899285,4cyclictest81rcu_preempt20:00:451
672899285,3cyclictest81rcu_preempt23:56:341
672899284,4cyclictest81rcu_preempt21:49:271
672899284,18cyclictest28803-21iostat_ios20:20:191
672899283,4cyclictest81rcu_preempt00:34:091
672899282,4cyclictest81rcu_preempt19:37:161
672899282,4cyclictest81rcu_preempt00:47:491
672899282,13cyclictest4397-21sensors_temp20:40:271
672899281,11cyclictest6627-21tr23:40:111
672799289,6cyclictest18734-21df21:20:140
672799284,17cyclictest28321-21ntp_states23:10:240
672799282,13cyclictest11565-21gdbus23:26:010
672799281,4cyclictest81rcu_preempt22:05:000
672799281,4cyclictest81rcu_preempt20:58:340
672799281,15cyclictest11894-21pidof22:26:010
672799281,14cyclictest20622-21python00:15:300
672799281,14cyclictest20622-21python00:15:300
672799281,14cyclictest15573-21/usr/sbin/munin22:35:300
6727992810,5cyclictest7082-21diskstats22:15:150
6727992810,5cyclictest12093-21ntp_states19:35:240
46962281,5sleep00-21swapper/020:40:520
162332281,5sleep10-21swapper/121:13:251
105492281,5sleep10-21swapper/122:25:021
87262271,5sleep10-21swapper/120:53:411
672899279,4cyclictest321552uname23:20:261
672899279,15cyclictest0-21swapper/122:05:191
672899275,4cyclictest81rcu_preempt00:54:371
672899275,3cyclictest81rcu_preempt23:05:491
672899274,4cyclictest81rcu_preempt22:35:411
672899273,19cyclictest28858-21plymouth00:40:001
672899272,3cyclictest81rcu_preempt00:42:111
672899272,11cyclictest16141-21df00:05:171
6728992717,6cyclictest21704-21cpuspeed_turbos00:20:121
6728992716,7cyclictest30118-21head23:15:221
672899271,4cyclictest81rcu_preempt22:16:341
672899271,15cyclictest0-21swapper/121:15:131
672799279,6cyclictest29303-21expr00:40:130
672799279,5cyclictest29855-21hddtemp_smartct23:15:170
672799272,8cyclictest30914-21ntp_states20:25:240
672799272,12cyclictest1675-21diskstats20:35:150
672799271,5cyclictest81rcu_preempt20:34:550
672799271,14cyclictest26926-21uname20:15:220
672799271,14cyclictest11565-21gdbus23:06:300
672799271,13cyclictest8593-21cstates23:45:120
672799271,13cyclictest6638-21tr23:40:110
672799271,13cyclictest31744-21ntp_kernel_pll_00:45:250
6727992710,6cyclictest15354-21taskset00:01:300
6727992710,5cyclictest16785-21cstates21:15:130
64362271,5sleep10-21swapper/122:13:081
58912271,5sleep10-21swapper/123:36:101
248732271,4sleep10-21swapper/100:27:431
24832271,5sleep10-21swapper/122:01:551
216582271,5sleep10-21swapper/122:54:501
216542271,5sleep10-21swapper/121:26:011
122392271,4sleep10-21swapper/121:00:571
103402271,5sleep10-21swapper/120:55:591
672899263,4cyclictest81rcu_preempt22:57:391
672799269,5cyclictest21242-21if_eth020:00:190
672799262,11cyclictest26991-21sensors21:40:290
672799261,9cyclictest1159-21ntpdc00:50:270
6727992617,5cyclictest3-21ksoftirqd/022:56:070
238692261,5sleep10-21swapper/120:05:521
672899251,4cyclictest81rcu_preempt21:22:441
672899251,20cyclictest14263-21chrt21:07:281
672799257,10cyclictest0-21swapper/022:49:290
672799256,5cyclictest28490-21df20:20:120
672799251,15cyclictest0-21swapper/021:47:390
672799236,5cyclictest40250irq/92-i91521:05:220
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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