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2026-04-29 - 00:08

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 highest latencies:
System rack9slot4s (updated Tue Apr 28, 2026 12:59:03)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
91359912941241,47cyclictest9331-21wget07:25:120
91369912600,1241cyclictest22810-21ssh09:15:251
91369911211087,30cyclictest9330-21aten_r4power_en07:25:121
90122568482,70sleep00-21swapper/007:24:160
90122568482,70sleep00-21swapper/007:24:160
89512484435,29sleep10-21swapper/107:23:401
89512484435,29sleep10-21swapper/107:23:391
913599230197,18cyclictest0-21swapper/009:15:250
93022990,4sleep00-21swapper/010:14:370
15392950,8sleep0913599cyclictest11:20:000
304932820,8sleep1913699cyclictest11:52:291
161572770,3sleep041ktimersoftd/009:45:130
59582760,5sleep00-21swapper/010:46:570
128792710,6sleep00-21swapper/008:55:290
107962670,5sleep010794-21tr11:30:120
252632660,9sleep1913699cyclictest11:10:001
325712550,7sleep0913599cyclictest09:26:120
85722540,7sleep1913699cyclictest10:50:171
9136995314,6cyclictest22-21ksoftirqd/109:50:311
9136995311,4cyclictest22-21ksoftirqd/112:48:531
177912530,4sleep1201rcuc/107:45:141
9136995217,5cyclictest22-21ksoftirqd/112:50:141
9136995216,6cyclictest22-21ksoftirqd/110:35:171
9136995210,6cyclictest22-21ksoftirqd/111:59:091
9136995210,6cyclictest22-21ksoftirqd/109:29:241
9136995113,6cyclictest22-21ksoftirqd/109:35:271
9136995112,6cyclictest22-21ksoftirqd/109:42:331
9136995112,6cyclictest22-21ksoftirqd/108:30:251
9136995111,5cyclictest22-21ksoftirqd/110:12:151
9136995016,4cyclictest22-21ksoftirqd/110:47:091
9136995014,6cyclictest22-21ksoftirqd/112:15:181
9136995014,6cyclictest22-21ksoftirqd/110:05:301
9136995014,5cyclictest22-21ksoftirqd/109:10:201
9136995012,9cyclictest22-21ksoftirqd/111:00:271
9136994914,6cyclictest22-21ksoftirqd/112:35:241
9136994914,6cyclictest22-21ksoftirqd/111:10:111
9136994914,5cyclictest22-21ksoftirqd/110:15:161
9136994914,5cyclictest22-21ksoftirqd/109:20:111
9136994913,6cyclictest22-21ksoftirqd/111:35:171
9136994913,6cyclictest22-21ksoftirqd/111:30:291
9136994913,6cyclictest22-21ksoftirqd/110:01:331
9136994913,6cyclictest22-21ksoftirqd/108:45:121
9136994911,6cyclictest22-21ksoftirqd/110:34:431
913699485,6cyclictest22-21ksoftirqd/112:04:131
913699485,5cyclictest22-21ksoftirqd/110:20:161
9136994815,6cyclictest22-21ksoftirqd/108:01:221
9136994815,4cyclictest22-21ksoftirqd/112:11:551
9136994814,6cyclictest22-21ksoftirqd/111:15:301
9136994814,6cyclictest22-21ksoftirqd/110:40:111
9136994813,5cyclictest22-21ksoftirqd/111:20:231
9136994813,5cyclictest22-21ksoftirqd/110:55:151
9136994813,5cyclictest22-21ksoftirqd/108:15:101
9136994812,5cyclictest22-21ksoftirqd/112:24:201
913699474,6cyclictest22-21ksoftirqd/112:26:251
9136994717,4cyclictest22-21ksoftirqd/112:08:361
9136994716,6cyclictest22-21ksoftirqd/107:35:151
9136994713,6cyclictest22-21ksoftirqd/109:30:291
9136994712,6cyclictest22-21ksoftirqd/109:45:111
9136994711,6cyclictest22-21ksoftirqd/111:45:121
9136994613,5cyclictest22-21ksoftirqd/107:52:201
913699459,5cyclictest22-21ksoftirqd/107:55:361
913699454,6cyclictest19265-21/usr/sbin/munin11:40:251
9136994511,6cyclictest22-21ksoftirqd/111:26:241
913699449,6cyclictest22-21ksoftirqd/112:40:431
9136994412,6cyclictest22-21ksoftirqd/107:33:201
9136994411,6cyclictest22-21ksoftirqd/109:00:151
9136994411,5cyclictest22-21ksoftirqd/110:26:011
913699439,6cyclictest22-21ksoftirqd/109:56:151
913699438,6cyclictest22-21ksoftirqd/108:55:121
913699437,6cyclictest22-21ksoftirqd/108:10:171
9136994311,5cyclictest22-21ksoftirqd/108:35:141
9136994310,6cyclictest22-21ksoftirqd/112:33:091
9136994310,6cyclictest22-21ksoftirqd/108:50:131
9136994310,6cyclictest22-21ksoftirqd/108:40:111
913699429,5cyclictest22-21ksoftirqd/108:25:261
9136994210,4cyclictest81rcu_preempt08:08:041
9136994210,4cyclictest81rcu_preempt08:08:031
9136994120,4cyclictest22-21ksoftirqd/109:05:151
9136994111,4cyclictest81rcu_preempt07:40:111
30712410,8sleep0913599cyclictest12:35:250
299862400,8sleep0913599cyclictest11:51:380
9136993823,5cyclictest22-21ksoftirqd/108:25:001
913599381,16cyclictest17495-21diskstats12:15:120
913599371,15cyclictest11564-21packagekitd12:31:510
913599357,14cyclictest11565-21gdbus10:52:110
9135993513,6cyclictest716-21ntp_states11:55:270
255142351,29sleep025536-21fschecks_count08:05:160
255142351,29sleep025536-21fschecks_count08:05:160
157872352,29sleep015913-21df07:40:130
913599342,28cyclictest0-21swapper/010:38:020
913599342,14cyclictest12650-21ntp_states07:30:240
913599341,20cyclictest9176-21ssh11:28:020
913599341,20cyclictest14377-21/usr/sbin/munin09:00:230
913599341,15cyclictest22225-21ssh10:29:160
913599334,5cyclictest81rcu_preempt09:59:220
913599334,4cyclictest81rcu_preempt11:48:460
913599334,4cyclictest81rcu_preempt11:22:440
913599334,4cyclictest81rcu_preempt11:05:170
913599334,4cyclictest81rcu_preempt10:07:530
913599334,4cyclictest81rcu_preempt09:20:220
913599333,4cyclictest81rcu_preempt12:21:280
913599331,20cyclictest14842-21iostat_ios10:20:180
913599331,13cyclictest0-21swapper/009:52:500
913599331,11cyclictest26574-21sendmail_mailqu11:10:270
913599326,4cyclictest81rcu_preempt09:13:290
913599325,4cyclictest81rcu_preempt10:55:160
913599324,4cyclictest81rcu_preempt09:31:050
913599323,4cyclictest81rcu_preempt12:12:580
913599323,14cyclictest3207-21ntpd10:00:250
913599321,8cyclictest0-21swapper/007:36:550
913599321,7cyclictest29047-21ssh12:28:330
913599316,13cyclictest9859-21ssh12:43:500
913599311,8cyclictest25258-21ssh10:32:010
913599311,8cyclictest12615-21ssh12:46:070
913599311,4cyclictest81rcu_preempt12:05:130
9135993113,4cyclictest16562-21timerandwakeup09:05:290
913599311,18cyclictest8528-21users09:35:300
913599311,17cyclictest15830-21ssh11:35:260
9135993111,5cyclictest15688-21/usr/sbin/munin12:50:170
913599308,11cyclictest3-21ksoftirqd/008:25:000
913599302,14cyclictest11078-21users08:50:320
9135993012,5cyclictest10643-21sh10:15:220
9135993012,4cyclictest12169-21iostat09:40:200
913599301,10cyclictest0-21swapper/011:00:590
913599299,6cyclictest4738-21fschecks_time12:00:170
913599295,4cyclictest81rcu_preempt10:40:240
913599292,14cyclictest3328-21/usr/sbin/munin08:30:270
9135992910,5cyclictest19564-21df11:40:130
60522291,5sleep00-21swapper/008:40:100
55382291,5sleep00-21swapper/008:36:370
209422291,5sleep00-21swapper/007:53:270
19132291,5sleep00-21swapper/008:29:030
913599289,6cyclictest24522-21apt-get08:01:360
913599282,13cyclictest27374-21df08:10:120
9135992810,6cyclictest2225-21dbus-daemon08:15:240
188642281,5sleep00-21swapper/007:46:190
913599279,6cyclictest8522-21iostat08:45:200
913599271,13cyclictest22780-21seq07:58:020
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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