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2026-05-17 - 23:08

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 Sun May 17, 2026 12:59:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
8179912341205,24cyclictest1250-21df_inode07:25:141
8169911411105,32cyclictest1459-21smartctl07:25:170
325242707659,31sleep00-21swapper/007:20:270
3842541495,32sleep10-21swapper/107:21:061
309042610,7sleep081699cyclictest08:40:200
75042550,3sleep1211ktimersoftd/107:40:141
288092380,8sleep00-21swapper/008:35:160
816993712,5cyclictest32242cut11:45:150
155762360,9sleep081699cyclictest10:50:270
96282341,29sleep19633-21ntp_states10:35:231
70632341,3sleep07118-21/usr/sbin/munin11:55:170
81699336,6cyclictest11032expr11:40:130
816993312,7cyclictest15978-21python08:00:310
81699331,20cyclictest5271-21latency_hist09:00:010
81699331,20cyclictest12488-21cut10:45:010
112662330,10sleep181799cyclictest07:50:111
92632321,4sleep19290-21ntp_states12:00:251
816993214,5cyclictest10927-21iostat12:05:180
251632321,5sleep10-21swapper/112:44:261
201502320,4sleep1201rcuc/112:30:151
173342320,6sleep0111rcuc/008:05:130
17182321,4sleep11756-21iostat10:15:181
816993123,5cyclictest0-21swapper/010:45:090
81699312,14cyclictest25902-21/usr/sbin/munin12:45:160
81699311,13cyclictest5182-21runrttasks07:33:270
81699311,12cyclictest0-21swapper/009:27:570
56452311,26sleep15652-21iostat_ios10:25:201
281532314,4sleep081rcu_preempt08:35:010
270332311,4sleep127040-21iostat_ios08:30:191
244022311,26sleep124422-21munin-run08:25:001
19172311,26sleep12015-21hddtemp_smartct08:50:161
187452311,5sleep10-21swapper/108:09:551
150532311,5sleep115057-21irqstats10:50:191
81699304,13cyclictest30156-21diskstats10:05:140
81699302,15cyclictest19831-21/usr/sbin/munin09:35:290
816993016,7cyclictest4196-21python10:20:270
81699301,4cyclictest81rcu_preempt12:39:440
81699301,4cyclictest81rcu_preempt12:32:350
816993012,5cyclictest28721-21runrttasks12:52:040
816993012,5cyclictest24861-21df_inode08:25:140
81699301,13cyclictest0-21swapper/008:51:230
23912301,5sleep10-21swapper/111:43:181
192992301,5sleep00-21swapper/012:27:050
176152301,5sleep10-21swapper/112:24:071
87932291,5sleep00-21swapper/009:07:550
817992919,6cyclictest14486-21cut12:15:141
817992917,8cyclictest20568-21cut11:05:171
817992916,7cyclictest7165-21iostat_ios11:55:191
81699299,7cyclictest30103-21iostat_ios11:30:210
81699292,16cyclictest0-21swapper/010:36:140
81699291,4cyclictest81rcu_preempt08:14:430
81699291,4cyclictest81rcu_preempt07:57:580
816992911,5cyclictest10323-21python07:45:280
816992910,7cyclictest21682-21/usr/sbin/munin09:40:300
81699290,4cyclictest81rcu_preempt10:00:200
44932291,5sleep10-21swapper/111:49:411
289172291,5sleep00-21swapper/011:25:400
276812291,5sleep00-21swapper/009:58:490
270042291,5sleep10-21swapper/112:48:461
253632291,5sleep00-21swapper/011:17:550
222972291,5sleep10-21swapper/108:17:501
179542291,5sleep00-21swapper/010:59:050
88162281,5sleep10-21swapper/109:08:091
81799283,19cyclictest6134-21iostat_ios07:35:191
817992819,5cyclictest24052-21cpuspeed_turbos11:15:141
81799281,23cyclictest18917-21cut09:35:151
816992811,5cyclictest32024-21df10:10:140
81699281,15cyclictest23522-21ntp_states08:20:240
294092281,5sleep10-21swapper/110:02:021
259282281,5sleep10-21swapper/108:26:211
229512281,5sleep10-21swapper/112:36:061
220702281,5sleep10-21swapper/109:43:561
202502281,5sleep10-21swapper/108:11:001
162632281,5sleep10-21swapper/108:00:491
147452281,5sleep10-21swapper/107:59:451
143772281,5sleep10-21swapper/109:22:061
137022281,5sleep10-21swapper/112:12:411
126032281,5sleep10-21swapper/109:18:241
122372281,5sleep10-21swapper/110:43:091
84082271,5sleep10-21swapper/110:32:381
81799279,15cyclictest26488-21fschecks_time09:55:171
81799273,18cyclictest30458-21iostat_ios10:05:191
817992718,6cyclictest17135-21ntp_kernel_pll_10:55:241
81799271,22cyclictest30265-21cut11:30:231
817992711,3cyclictest0-21swapper/111:00:161
817992710,13cyclictest9740-21if_eth009:10:181
81699279,6cyclictest13432-21hddtemp_smartct09:20:160
81699279,5cyclictest23799-21df_inode12:40:140
81699279,4cyclictest22217-21cron08:17:000
81699273,19cyclictest18522-21diskstats11:00:150
81699272,13cyclictest7722-21df_inode07:40:160
816992710,5cyclictest312-21taskset11:36:490
61782271,4sleep00-21swapper/011:52:410
5862271,5sleep10-21swapper/111:39:351
49602271,5sleep10-21swapper/107:31:081
47762271,5sleep10-21swapper/110:23:541
315512271,5sleep10-21swapper/108:41:051
296162271,5sleep10-21swapper/108:35:441
291372271,5sleep10-21swapper/111:27:581
288572271,5sleep10-21swapper/112:53:331
273462271,4sleep10-21swapper/111:23:511
256792271,5sleep10-21swapper/109:52:281
185312271,5sleep10-21swapper/112:25:221
139622271,5sleep10-21swapper/110:46:361
136332271,5sleep00-21swapper/012:11:580
109152271,5sleep10-21swapper/107:48:581
81799261,12cyclictest4695-21/usr/sbin/munin11:50:281
817992610,12cyclictest0-21swapper/108:55:291
81699269,4cyclictest6417-21runrttasks10:26:220
81699269,15cyclictest0-21swapper/009:51:480
81699268,6cyclictest1653-21perl10:15:160
81699265,6cyclictest0-21swapper/007:50:500
81699262,6cyclictest20406-21/usr/sbin/munin11:05:150
816992615,7cyclictest17737-21ls09:30:270
81699261,17cyclictest0-21swapper/009:17:550
81699261,16cyclictest0-21swapper/011:23:430
81699261,13cyclictest9996-21ntp_states09:10:240
81699261,13cyclictest968-21chrt08:46:020
81699261,11cyclictest5928-21grep07:35:140
81699261,11cyclictest24058-21idleruntime-cro09:50:000
67952261,5sleep10-21swapper/109:01:401
236902261,5sleep10-21swapper/109:46:151
166722261,4sleep00-21swapper/012:20:220
163472261,4sleep10-21swapper/109:28:061
11682261,5sleep10-21swapper/108:48:071
817992510,11cyclictest0-21swapper/109:30:461
81699251,15cyclictest0-21swapper/011:10:060
81699251,12cyclictest6012-21irqstats09:00:220
816992511,10cyclictest15077-21mailstats12:15:260
81799242,18cyclictest0-21swapper/112:05:181
817992414,6cyclictest23698-21awk11:14:591
816992414,6cyclictest7525-21iostat_ios10:30:200
81799232,16cyclictest32330-21iostat10:10:211
816992314,6cyclictest10158-21sshd12:04:520
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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