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2026-08-22 - 20:54

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 376 highest latencies:
System rack9slot4s (updated Sat Aug 22, 2026 12:59:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
126779911891154,30cyclictest12844-21wget07:25:101
126779911741146,24cyclictest15144-21iostat_ios11:45:201
124542561518,28sleep00-21swapper/007:23:130
123182464418,31sleep10-21swapper/107:21:501
1267699206182,17cyclictest12847-21tr07:25:100
1267699184160,21cyclictest0-21swapper/011:45:190
246692810,5sleep024670-21basename09:20:110
315292740,4sleep10-21swapper/109:35:281
1267699724,8cyclictest18961-21file07:39:000
1267699641,14cyclictest14966-21cut07:30:030
12676996110,6cyclictest9010-21chrt10:04:200
12676995819,34cyclictest20548-21grep07:40:300
1267699581,14cyclictest30561-21cut08:10:000
1267699572,8cyclictest23589-21ntp_states09:15:240
1267699572,12cyclictest6380-21sed11:20:300
12676995711,8cyclictest5501-21/usr/sbin/munin09:55:120
1267699571,14cyclictest32700-21cut08:15:130
12676995710,5cyclictest17273-21hddtemp_smartct10:25:180
1267699562,14cyclictest6699-21/usr/sbin/munin08:30:260
12676995612,5cyclictest10071-21ntp_states10:05:250
1267699561,12cyclictest24292-21grep07:50:290
1267799551,15cyclictest32419-21iostat11:05:211
1267699559,5cyclictest11462-21ls11:35:220
1267699552,13cyclictest30693-21/usr/sbin/munin08:10:110
12676995512,5cyclictest2225-21dbus-daemon09:09:290
1267699551,13cyclictest5684-21/usr/sbin/munin12:45:260
1267699551,13cyclictest23670-21taskset12:08:520
1267799548,14cyclictest2041-21fschecks_time09:45:161
1267799540,21cyclictest17128-21/usr/sbin/munin09:00:271
1267699541,48cyclictest32084-21cut12:30:210
1267699541,12cyclictest2225-21dbus-daemon10:22:270
1267799530,18cyclictest25354-21chrt12:11:521
1267699538,5cyclictest7158-21cut12:50:170
1267699532,11cyclictest0-21swapper/011:55:160
12676995316,31cyclictest1907-21diskstats09:45:150
1267699531,13cyclictest20639-21/usr/sbin/munin12:00:170
1267799520,18cyclictest27326-21chrt12:17:521
1267699521,7cyclictest876-21sort09:40:300
1267699521,11cyclictest2256-21df_inode08:20:130
1267799510,18cyclictest22578-21chrt07:46:071
1267699512,11cyclictest0-21swapper/009:30:280
12676995119,28cyclictest21586-21fschecks_count07:45:150
1267699511,16cyclictest18616-21sshd09:02:420
1267699511,12cyclictest26232-21aten_r4power_en10:50:130
1267699511,12cyclictest25161-21unixbench_singl12:10:300
1267799501,17cyclictest11865-21timerandwakeup11:35:291
1267799500,16cyclictest22765-21/usr/sbin/munin09:15:271
1267799500,16cyclictest10191-21iostat_ios08:40:201
1267799500,15cyclictest7468-21sshd12:50:231
1267799500,14cyclictest30246-21date09:35:001
1267699509,37cyclictest11330-21cpuspeed_turbos10:10:110
1267699508,5cyclictest10604-21munin-run11:35:010
1267699504,39cyclictest0-21swapper/012:35:250
1267699502,15cyclictest5126-21unixbench_multi08:25:300
12676995015,31cyclictest26044-21wc10:50:010
1267699501,12cyclictest8627-21awk08:35:270
1267799497,12cyclictest14822-21uniq07:30:011
1267799493,16cyclictest26284-21chrt07:55:421
1267799491,17cyclictest8446-21chrt11:27:081
1267799491,17cyclictest19959-21chrt11:59:301
1267799490,24cyclictest9731-21hddtemp_smartct10:05:171
1267799490,15cyclictest2252-21df08:20:121
1267799490,15cyclictest17339-21if_eth010:25:201
1267799490,14cyclictest31009-21chrt12:26:571
1267699494,7cyclictest2082-21ntp_states11:10:220
1267699492,16cyclictest16969-21munin-run09:00:010
12676994914,6cyclictest9617-21cut08:40:120
1267699491,14cyclictest30245-21diskstats11:00:140
1267799481,17cyclictest22073-21chrt10:38:151
1267799481,17cyclictest14790-21chrt08:52:071
1267799481,16cyclictest21384-21smartctl09:10:181
1267799481,16cyclictest16576-21chrt10:24:401
1267799481,14cyclictest2695-21snmpd11:53:301
1267799480,18cyclictest4577-21chrt11:16:081
1267799480,18cyclictest21707-21chrt12:02:581
1267799480,17cyclictest6470-21chrt11:21:061
1267799480,17cyclictest20319-21chrt10:34:331
1267799480,17cyclictest12710-21chrt10:13:431
1267799480,16cyclictest27026-21perl09:25:191
1267799480,15cyclictest568-21chrt12:33:281
1267799480,15cyclictest27448-21if_eth008:00:181
1267799480,15cyclictest22359-21sh12:05:151
1267799480,14cyclictest19093-21chrt07:39:071
1267799480,12cyclictest8949-21grep08:35:301
1267699489,34cyclictest0-21swapper/010:35:000
1267699482,11cyclictest0-21swapper/009:35:120
1267699482,10cyclictest0-21swapper/008:45:120
12676994810,4cyclictest0-21swapper/012:30:010
12676994810,4cyclictest0-21swapper/009:25:140
1267799470,18cyclictest5286-21chrt08:26:091
1267799470,18cyclictest26225-21chrt09:23:291
1267799470,17cyclictest3046-21chrt11:14:551
1267799470,16cyclictest8764-21chrt10:01:451
1267799470,16cyclictest19921-21cat07:40:201
1267799470,14cyclictest11969-21which08:45:161
1267699479,4cyclictest0-21swapper/009:50:150
1267699473,8cyclictest3535-21diskstats11:15:170
1267699472,17cyclictest21129-21iostat_ios10:35:210
1267699472,11cyclictest0-21swapper/010:40:290
12676994711,5cyclictest24997-21aten_r4power_cu07:55:100
12676994711,4cyclictest32246-21fschecks_time11:05:170
1267699471,13cyclictest14390-21switchtime08:50:270
1267699471,11cyclictest13281-21cut11:40:200
12676994710,5cyclictest3584-21sshd12:40:210
1267799461,16cyclictest23266-21awk10:40:251
1267799461,11cyclictest7374-21chrt08:33:231
1267799460,16cyclictest32174-21chrt08:13:121
1267799460,16cyclictest1561-21chrt08:17:491
1267799460,14cyclictest28009-21df12:20:141
1267799460,12cyclictest24598-21diskstats10:45:161
1267699466,12cyclictest14729-21latency_hist10:20:010
1267699466,12cyclictest14729-21latency_hist10:20:000
1267699464,8cyclictest28349-21diskstats10:55:150
12676994611,6cyclictest8326-21seq11:25:550
1267699461,12cyclictest26418-21sshd12:15:200
12676994610,6cyclictest22035-21timerwakeupswit09:10:290
1267799450,26cyclictest20646-21chrt09:09:161
1267799450,15cyclictest5359-21if_err_eth012:45:181
1267799450,15cyclictest16243-21mailstats08:55:271
1267699453,8cyclictest2695-21snmpd08:02:420
1267699451,16cyclictest16423-21/usr/sbin/munin11:50:130
1267699451,15cyclictest29054-21taskset12:21:040
1267799440,15cyclictest13168-21which11:40:171
1267799431,10cyclictest28656-21irqstats10:55:211
1267799430,16cyclictest30450-21which11:00:171
1267799422,9cyclictest3174-21df_inode12:40:151
1267799411,19cyclictest30590-21latency_hist08:10:011
1267799411,15cyclictest0-21swapper/107:52:401
1267799401,27cyclictest0-21swapper/112:38:381
1267799401,14cyclictest3286-21runrttasks09:54:341
1267799392,26cyclictest0-21swapper/110:18:101
1267799392,26cyclictest0-21swapper/110:18:091
1267799392,26cyclictest0-21swapper/109:58:061
1267799391,26cyclictest0-21swapper/111:33:251
1267799391,26cyclictest0-21swapper/109:43:021
1267799385,11cyclictest40250irq/92-i91510:50:231
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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