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2026-04-06 - 17:36

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 Mon Apr 06, 2026 12:59:03)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
157359912401211,25cyclictest16706-21ntp_states07:25:241
157349911361099,33cyclictest16627-21strings07:25:230
156412661619,26sleep10-21swapper/107:24:371
154132499417,66sleep00-21swapper/007:22:140
20592800,4sleep041ktimersoftd/009:54:100
203182790,5sleep120316-21sensors_temp10:45:311
203182790,5sleep120316-21sensors_temp10:45:301
144352730,24sleep03-21ksoftirqd/008:45:000
184622660,2sleep018464-21ntpq10:10:250
93782460,7sleep11573599cyclictest08:30:161
217202460,4sleep1211ktimersoftd/112:27:311
227922450,7sleep11573599cyclictest11:55:191
92552410,8sleep01573499cyclictest08:30:150
233052410,9sleep01573499cyclictest07:40:290
1573499414,20cyclictest24912-21ntp_states10:50:250
15734994121,6cyclictest12395-21wc11:45:000
15734993925,10cyclictest0-21swapper/010:57:350
1573499391,28cyclictest0-21swapper/012:19:390
174172380,5sleep0111rcuc/012:23:180
1573499387,5cyclictest15078-21rm10:40:230
1573499386,28cyclictest0-21swapper/010:08:150
1573499381,23cyclictest25276-21taskset09:44:500
300492371,4sleep130159-21date11:30:001
1573499377,4cyclictest81rcu_preempt09:33:020
1573499372,11cyclictest0-21swapper/012:49:460
1573599365,4cyclictest81rcu_preempt10:35:241
1573599363,18cyclictest10727-21iostat_ios12:50:181
15735993627,5cyclictest2403-21irqbalance10:02:361
15735993613,4cyclictest40550irq/92-i91510:14:341
15734993627,5cyclictest2309-21cron10:35:000
4622351,30sleep1476-21ssh10:59:241
309552351,30sleep031017-21/usr/sbin/munin08:00:290
240432351,4sleep124053-21ssh09:43:021
1573599355,4cyclictest81rcu_preempt12:03:321
15735993517,15cyclictest22-21ksoftirqd/109:35:511
15734993512,6cyclictest9410-21aten_r4power_cu10:35:110
1573499351,10cyclictest0-21swapper/012:25:130
15734993510,10cyclictest5485-21fschecks_count08:20:150
113852351,4sleep011392-21ssh10:03:310
242072341,29sleep024336-21df09:10:120
1573599346,4cyclictest81rcu_preempt12:16:491
1573599345,8cyclictest8906-21ssh10:34:411
1573599343,4cyclictest81rcu_preempt11:24:511
1573599343,4cyclictest81rcu_preempt09:24:421
15735993425,6cyclictest30225-21cron09:50:001
1573599342,28cyclictest0-21swapper/110:08:351
1573499345,16cyclictest0-21swapper/011:59:250
1573499343,16cyclictest7305-21ntpq09:25:270
1573499342,29cyclictest0-21swapper/010:45:360
1573499342,29cyclictest0-21swapper/010:45:360
1573499341,7cyclictest7380-21ssh09:59:450
1573499341,29cyclictest1449-21hddtemp_smartct12:40:150
15734993412,10cyclictest0-21swapper/011:29:290
15734993411,11cyclictest28516-21latency07:55:200
1573599335,4cyclictest81rcu_preempt09:54:001
1573599335,4cyclictest81rcu_preempt08:51:361
15735993326,5cyclictest0-21swapper/111:39:161
1573599332,4cyclictest0-21swapper/110:51:161
15735993323,6cyclictest14829-21diskstats08:45:151
1573599331,7cyclictest14498-21ssh11:46:141
1573599331,5cyclictest1968-21lldpad11:51:171
1573499339,10cyclictest30497-21gdbus11:52:360
1573499338,13cyclictest8923-21turbostat.cron12:15:000
1573499338,11cyclictest3302-21runrttasks11:19:380
1573499332,13cyclictest1885-21hddtemp_smartct09:20:170
1573499331,4cyclictest81rcu_preempt12:51:120
1573499331,21cyclictest5225-21ssh11:04:020
239402321,3sleep10-21swapper/107:45:001
1573599329,5cyclictest0-21swapper/112:36:511
1573599325,14cyclictest0-21swapper/109:12:171
1573599324,4cyclictest81rcu_preempt12:34:141
1573599323,4cyclictest81rcu_preempt11:33:101
1573599323,4cyclictest81rcu_preempt10:25:301
15735993225,5cyclictest0-21swapper/112:11:551
15735993224,5cyclictest20682-21hddtemp_smartct09:00:161
1573599321,5cyclictest0-21swapper/108:12:561
1573599321,4cyclictest2403-21irqbalance11:15:561
1573599321,29cyclictest0-21swapper/111:44:361
1573599321,29cyclictest0-21swapper/110:16:351
1573599321,16cyclictest8751-21ssh09:26:551
1573499323,4cyclictest81rcu_preempt11:39:050
15734993224,5cyclictest25240-21cron11:25:000
1573499321,6cyclictest24661-21/usr/sbin/munin12:30:240
1573499321,17cyclictest0-21swapper/009:16:200
1573499321,10cyclictest0-21swapper/012:07:490
236852311,5sleep10-21swapper/109:09:061
183792311,3sleep00-21swapper/008:55:140
1573599316,4cyclictest81rcu_preempt09:55:161
1573599315,4cyclictest81rcu_preempt10:20:131
15735993126,3cyclictest0-21swapper/111:06:361
1573599312,4cyclictest81rcu_preempt12:09:151
15735993124,5cyclictest0-21swapper/108:23:361
1573599311,8cyclictest81rcu_preempt09:16:411
15735993115,13cyclictest22-21ksoftirqd/107:55:171
1573599311,4cyclictest81rcu_preempt08:28:141
1573599310,4cyclictest81rcu_preempt11:01:121
1573499319,6cyclictest19676-21ssh09:38:430
1573499319,4cyclictest15732-21cyclictest09:45:220
1573499317,11cyclictest30466-21ssh12:03:210
1573499316,4cyclictest81rcu_preempt10:20:000
1573499315,4cyclictest81rcu_preempt09:06:220
1573499312,4cyclictest81rcu_preempt12:36:560
15734993123,5cyclictest0-21swapper/011:13:450
1573499311,5cyclictest81rcu_preempt10:28:590
15734993112,6cyclictest20478-21df_inode09:00:120
316532300,5sleep181rcu_preempt08:05:011
1573599303,4cyclictest81rcu_preempt11:14:521
1573599303,3cyclictest81rcu_preempt09:32:411
1573599302,4cyclictest81rcu_preempt08:44:251
1573599301,4cyclictest81rcu_preempt12:41:271
1573599301,4cyclictest81rcu_preempt10:40:111
1573499301,4cyclictest81rcu_preempt08:50:040
15734993012,5cyclictest27881-21iostat10:20:180
1573499301,18cyclictest32451-21runrttasks11:31:270
15734993011,6cyclictest12857-21diskstats11:45:150
1573499301,12cyclictest0-21swapper/008:27:130
259802291,5sleep10-21swapper/107:50:101
1573599294,4cyclictest81rcu_preempt07:36:451
1573599292,4cyclictest81rcu_preempt07:30:321
1573499294,18cyclictest32419-21iostat_ios08:05:200
1573499293,5cyclictest81rcu_preempt11:05:110
1573499293,14cyclictest0-21swapper/007:30:050
1573499292,14cyclictest15131-21iostat_ios08:45:210
15734992919,6cyclictest11844-21wc08:35:270
10092291,5sleep10-21swapper/108:09:261
254142281,5sleep10-21swapper/107:45:481
1573599288,7cyclictest14080-21aten_r4power_en12:20:111
15735992816,4cyclictest22-21ksoftirqd/112:48:221
1573499287,11cyclictest0-21swapper/007:36:410
1573499284,18cyclictest2078-21ntp_states08:10:230
1573499282,13cyclictest3533-21df_inode08:15:140
1573499281,4cyclictest0-21swapper/007:51:550
1573499281,13cyclictest25333-21unixbench_singl07:45:300
46162271,5sleep10-21swapper/108:16:321
197742271,5sleep10-21swapper/108:57:391
121962261,5sleep10-21swapper/108:37:071
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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