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2026-08-20 - 05:41

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 Thu Aug 20, 2026 00:59:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
213489912471213,30cyclictest23269-21munin-node19:30:011
211752577532,30sleep10-21swapper/119:23:471
210962563517,31sleep00-21swapper/019:22:570
2134799199186,7cyclictest23212-21munin-run19:30:000
784121290,7sleep02134799cyclictest20:10:280
89322710,8sleep12134899cyclictest20:15:161
109792400,5sleep1201rcuc/120:20:171
21347993922,6cyclictest3-21ksoftirqd/019:49:140
21347993822,6cyclictest3-21ksoftirqd/023:36:540
21347993822,6cyclictest3-21ksoftirqd/021:26:580
21347993822,5cyclictest3-21ksoftirqd/021:15:180
2134899371,7cyclictest30830-21tune2fs00:05:181
21347993721,6cyclictest3-21ksoftirqd/023:33:560
21347993620,5cyclictest3-21ksoftirqd/023:14:080
297982351,4sleep129870-21if_eth021:10:181
2134799352,20cyclictest6555-21sh20:10:010
21347993520,6cyclictest3-21ksoftirqd/022:21:070
21347993520,5cyclictest3-21ksoftirqd/020:17:080
21347993519,5cyclictest3-21ksoftirqd/000:34:270
21347993512,13cyclictest40250irq/92-i91523:02:130
2134799342,17cyclictest0-21swapper/023:05:270
21347993419,5cyclictest3-21ksoftirqd/020:39:550
21347993419,5cyclictest3-21ksoftirqd/000:50:560
21347993417,6cyclictest3-21ksoftirqd/023:21:160
160952341,29sleep016268-21perl22:00:150
73672331,9sleep10-21swapper/100:29:581
32622331,28sleep011564-21packagekitd00:16:350
2747223317,4sleep122-21ksoftirqd/121:05:121
268842331,4sleep12695-21snmpd22:29:521
21347993319,4cyclictest3-21ksoftirqd/000:09:200
21347993318,5cyclictest3-21ksoftirqd/000:28:380
21347993317,5cyclictest3-21ksoftirqd/021:33:010
2134799331,13cyclictest0-21swapper/021:14:570
255462321,5sleep00-21swapper/019:33:160
234772321,4sleep023614-21cat20:55:010
2134899323,5cyclictest1778-21/usr/sbin/munin00:15:201
21348993222,6cyclictest14488-21/usr/sbin/munin21:55:211
2134799328,13cyclictest798-21munin-run19:55:010
2134799327,14cyclictest40250irq/92-i91521:55:230
2134799327,14cyclictest40250irq/92-i91521:05:220
2134799323,13cyclictest11565-21gdbus00:10:510
21347993224,6cyclictest0-21swapper/022:34:480
21347993217,5cyclictest3-21ksoftirqd/020:24:210
21347993217,4cyclictest3-21ksoftirqd/023:17:520
21347993216,6cyclictest3-21ksoftirqd/000:36:230
21347993216,5cyclictest3-21ksoftirqd/022:36:410
21347993216,5cyclictest3-21ksoftirqd/020:33:080
21347993212,10cyclictest3-21ksoftirqd/021:44:300
21347993211,10cyclictest3-21ksoftirqd/021:02:220
256212311,4sleep125655-21ntp_states23:50:241
249842311,26sleep025109-21df23:50:130
2134899316,4cyclictest81rcu_preempt19:43:391
21348993122,5cyclictest19374-21sh22:09:591
21347993118,4cyclictest3-21ksoftirqd/020:45:100
21347993117,4cyclictest3-21ksoftirqd/000:21:170
21347993116,5cyclictest3-21ksoftirqd/023:27:180
21347993115,6cyclictest3-21ksoftirqd/019:57:570
21347993112,5cyclictest25785-21iostat_ios22:25:180
203392310,4sleep181rcu_preempt22:10:241
110852311,9sleep10-21swapper/100:39:361
2134899305,4cyclictest81rcu_preempt00:40:341
2134899304,4cyclictest81rcu_preempt20:14:321
2134899304,4cyclictest81rcu_preempt20:06:451
21348993019,6cyclictest15626-21ls00:50:171
21348993018,7cyclictest28802-21cpuspeed_turbos00:00:151
2134899301,4cyclictest81rcu_preempt22:20:221
2134799308,6cyclictest10299-21sort21:45:100
2134799302,15cyclictest902-21df_inode21:20:150
21347993015,5cyclictest3-21ksoftirqd/023:55:070
21347993015,5cyclictest3-21ksoftirqd/021:37:320
21347993015,5cyclictest3-21ksoftirqd/020:03:110
21347993013,5cyclictest14048-21ntp_states00:45:260
21347993012,5cyclictest19831-21diskstats22:10:150
204762301,5sleep10-21swapper/123:35:461
149102301,5sleep10-21swapper/100:49:491
79002291,5sleep10-21swapper/121:38:131
54232291,5sleep00-21swapper/022:55:440
43312291,5sleep10-21swapper/120:01:271
39922291,5sleep10-21swapper/121:26:351
286432291,5sleep10-21swapper/122:33:371
258762291,5sleep00-21swapper/019:35:090
258762291,5sleep00-21swapper/019:35:090
243482291,5sleep00-21swapper/023:46:430
227182291,5sleep00-21swapper/023:44:180
215612291,5sleep10-21swapper/120:49:341
2134899295,4cyclictest81rcu_preempt00:33:591
2134899293,5cyclictest81rcu_preempt21:20:011
2134899293,17cyclictest0-21swapper/119:33:271
2134899292,13cyclictest25379-21munin-run21:00:011
21347992914,5cyclictest3-21ksoftirqd/020:58:000
21347992913,6cyclictest3-21ksoftirqd/022:09:550
21347992913,5cyclictest3-21ksoftirqd/022:40:330
2134799291,18cyclictest0-21swapper/020:26:290
195332291,5sleep10-21swapper/120:43:021
18692291,5sleep00-21swapper/022:48:560
7262281,5sleep10-21swapper/119:54:271
35742281,5sleep00-21swapper/022:50:590
305232281,5sleep10-21swapper/122:38:391
274052281,5sleep10-21swapper/119:38:031
274052281,5sleep10-21swapper/119:38:031
271422281,5sleep10-21swapper/121:03:521
225652281,5sleep10-21swapper/123:42:421
2134899285,4cyclictest81rcu_preempt23:10:521
2134899284,5cyclictest81rcu_preempt23:30:211
2134899284,4cyclictest81rcu_preempt22:41:021
2134899284,3cyclictest81rcu_preempt22:03:401
2134899283,4cyclictest81rcu_preempt22:58:351
2134899283,4cyclictest81rcu_preempt22:50:511
2134899283,19cyclictest4784-21diskstats21:30:151
2134899281,4cyclictest81rcu_preempt21:51:521
21348992812,9cyclictest23249-21diskstats23:45:151
21348992810,14cyclictest3856-21aten_r4power_po00:20:111
2134799289,15cyclictest19089-21timerandwakeup20:40:280
2134799286,10cyclictest28896-21df_inode00:00:170
2134799282,13cyclictest12142-21ntp_states00:40:250
21347992814,4cyclictest3-21ksoftirqd/019:42:350
2134799281,14cyclictest12698-21memory21:50:210
159112281,5sleep10-21swapper/120:34:351
74912271,5sleep10-21swapper/123:02:301
281822271,5sleep10-21swapper/123:57:361
24132271,5sleep10-21swapper/119:57:101
23262271,4sleep10-21swapper/121:24:481
230782271,5sleep00-21swapper/022:19:280
230012271,5sleep10-21swapper/122:18:401
2134899274,8cyclictest8193-21diskstats23:05:141
2134899273,4cyclictest81rcu_preempt20:52:481
21348992718,6cyclictest22-21ksoftirqd/123:15:121
21348992717,5cyclictest9981-21watchsnmpd21:45:011
2134899271,22cyclictest15708-21df23:25:121
18232271,5sleep10-21swapper/122:48:271
175552271,5sleep10-21swapper/120:37:111
101212271,5sleep10-21swapper/121:45:031
310042261,5sleep10-21swapper/119:46:161
21348992612,7cyclictest490-21iostat_ios00:10:191
2134899261,12cyclictest12653-21df_inode20:25:141
149422261,5sleep10-21swapper/123:21:431
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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