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2026-04-12 - 00:19

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, slot #3

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 rack5slot3s.osadl.org (updated Sat Apr 11, 2026 12:44:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
296182240162,26sleep00-21swapper/007:08:050
278012237163,23sleep30-21swapper/307:05:043
297222234164,57sleep20-21swapper/207:09:292
294592233158,24sleep10-21swapper/107:06:021
81412630,11sleep230-21rcuc/212:25:162
230872500,4sleep121-21rcuc/110:30:251
33172460,4sleep339-21rcuc/312:15:133
33172460,4sleep339-21rcuc/312:15:133
275982450,2sleep10-21swapper/108:15:161
2986399431,34cyclictest0-21swapper/209:40:112
2985399389,13cyclictest10413-21basename10:05:000
2987099351,18cyclictest0-21swapper/311:07:183
2987099351,18cyclictest0-21swapper/311:07:183
2987099341,24cyclictest0-21swapper/312:30:303
2987099321,23cyclictest0-21swapper/309:57:323
2987099321,22cyclictest0-21swapper/311:32:083
2987099321,12cyclictest0-21swapper/309:21:083
2985399325,12cyclictest8192-21munin-run10:00:000
2985399324,13cyclictest24550-21awk08:10:010
2987099311,13cyclictest0-21swapper/307:27:373
2987099311,13cyclictest0-21swapper/307:27:363
2987099310,23cyclictest0-21swapper/311:53:413
2987099310,14cyclictest0-21swapper/312:05:263
2987099301,10cyclictest0-21swapper/310:40:493
2987099291,12cyclictest0-21swapper/308:54:253
2985399294,12cyclictest30183-21munin-run10:50:010
2987099281,9cyclictest0-21swapper/310:46:253
2987099281,19cyclictest0-21swapper/308:12:253
2987099281,18cyclictest0-21swapper/308:37:013
2987099281,18cyclictest0-21swapper/308:37:013
2987099281,16cyclictest0-21swapper/312:22:543
2987099281,11cyclictest0-21swapper/309:19:563
2987099281,10cyclictest0-21swapper/308:46:213
2987099280,17cyclictest0-21swapper/311:16:223
2987099280,12cyclictest0-21swapper/310:14:373
29863992818,5cyclictest0-21swapper/210:03:202
2987099271,11cyclictest0-21swapper/311:25:493
2987099271,10cyclictest2883-21ntpq09:45:203
2987099271,10cyclictest0-21swapper/312:10:253
2987099270,19cyclictest0-21swapper/307:35:573
2987099270,12cyclictest0-21swapper/310:03:293
2987099270,11cyclictest0-21swapper/309:54:443
2987099270,10cyclictest0-21swapper/309:11:533
2985799272,10cyclictest13499-21hwlatdetect10:10:171
2985399272,20cyclictest87350irq/126-enp1s0-09:39:260
2987099261,11cyclictest18570-21diskmemload10:51:103
2987099261,11cyclictest0-21swapper/312:35:583
2987099261,11cyclictest0-21swapper/308:31:133
2987099261,10cyclictest0-21swapper/311:13:533
2987099261,10cyclictest0-21swapper/307:13:413
2987099260,9cyclictest0-21swapper/311:44:243
2987099260,8cyclictest0-21swapper/308:59:453
2987099260,12cyclictest0-21swapper/310:20:213
2987099260,11cyclictest0-21swapper/308:24:293
2987099260,11cyclictest0-21swapper/307:47:213
2986399261,12cyclictest0-21swapper/208:12:412
2985799261,16cyclictest0-21swapper/112:34:451
2985799261,12cyclictest0-21swapper/107:10:241
2985399269,2cyclictest21294-21smart_sda11:40:230
2985399265,17cyclictest13215-21munin-run11:25:010
2987099251,9cyclictest28878-21grep12:00:123
2987099251,12cyclictest0-21swapper/311:21:263
2987099251,11cyclictest0-21swapper/307:43:333
2987099251,10cyclictest0-21swapper/311:56:533
2987099251,10cyclictest0-21swapper/309:42:363
2987099251,10cyclictest0-21swapper/308:41:253
2987099251,10cyclictest0-21swapper/308:06:253
2987099250,9cyclictest0-21swapper/311:02:143
2987099250,11cyclictest0-21swapper/310:36:493
2987099250,10cyclictest0-21swapper/311:35:093
2987099250,10cyclictest0-21swapper/307:20:323
2985799252,20cyclictest5091-21ntp_states09:50:231
2985799252,19cyclictest31689-40dnf09:39:251
2985799251,21cyclictest9145-21latency_hist07:35:021
2985799251,21cyclictest8144-21diskstats08:45:141
2985799251,21cyclictest802-21sssd_be11:40:131
2985799251,21cyclictest27910-21df09:30:131
2985799251,21cyclictest19316-21cat10:25:021
2985799251,21cyclictest16320-21wc10:15:251
2985799251,21cyclictest15974-21df_inode11:30:151
2985799250,18cyclictest0-21swapper/111:55:191
29853992514,3cyclictest87550irq/128-enp1s0-12:35:160
2985399251,12cyclictest23582-21munin-run10:35:010
2985399250,12cyclictest16999-21awk10:20:010
2987099248,3cyclictest0-21swapper/311:47:443
2987099241,9cyclictest0-21swapper/307:58:273
2987099241,13cyclictest32276-21memory08:25:173
2987099241,11cyclictest0-21swapper/310:09:213
2987099241,10cyclictest0-21swapper/312:28:583
29870992410,3cyclictest0-21swapper/308:01:013
2987099240,9cyclictest0-21swapper/309:27:083
2985799241,20cyclictest22171-21chrt08:02:561
2985799241,20cyclictest21799-21irqstats09:15:181
2985799241,20cyclictest16595-21/usr/sbin/munin09:05:171
2985799241,11cyclictest5945-21diskstats08:40:141
2985799241,11cyclictest25152-21latency_hist09:25:011
2985799241,11cyclictest18641-21irqstats11:35:171
2985799241,10cyclictest0-21swapper/109:40:111
2985399246,15cyclictest967-21perf08:30:010
2987099236,3cyclictest0-21swapper/307:50:473
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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