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2025-12-04 - 04:07

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, 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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Data to construct the above plot have been generated using the RT test utility cyclictest.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: ondemand
Compare latency of primary with shadow system
Characteristics of the 792 highest latencies:
System rack5slot4s.osadl.org (updated Thu Dec 04, 2025 00:44:18)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3222927997164,5cyclictest3255320-21kworker/u8:2+events_unbound21:11:111
3222927996458,4cyclictest3255320-21kworker/u8:2+events_unbound20:55:001
3222932996157,3cyclictest3433900-21kworker/u8:3+flush-8:000:01:252
3222925996155,4cyclictest3255320-21kworker/u8:2+events_unbound19:41:160
3222925996054,4cyclictest3327631-21kworker/u8:0+events_unbound22:31:220
3222932995953,4cyclictest3433900-21kworker/u8:3+flush-8:022:56:192
3222927995953,4cyclictest3229992-21kworker/u8:0+events_unbound19:26:141
3222927995948,8cyclictest3378444-21ntpq21:41:171
3222927995948,8cyclictest3378444-21ntpq21:41:171
3222932995852,3cyclictest3466658-21kworker/u8:1+flush-8:023:11:242
3222927995851,5cyclictest3409432-21kworker/u8:2+flush-8:022:41:161
3222927995851,5cyclictest3409432-21kworker/u8:2+flush-8:022:41:161
3222927995850,6cyclictest3285539-21kworker/u8:1+flush-8:020:41:201
3222925995850,6cyclictest3513636-21kworker/u8:4+flush-8:000:31:170
3222927995652,3cyclictest3433900-21kworker/u8:3+events_unbound22:40:001
3222927995652,3cyclictest3433900-21kworker/u8:3+events_unbound22:40:001
3222927995650,5cyclictest3513636-21kworker/u8:4+events_unbound00:06:261
3222927995650,4cyclictest3466658-21kworker/u8:1+flush-8:023:26:161
3222927995650,4cyclictest3285539-21kworker/u8:1+events_unbound20:21:251
3222925995650,4cyclictest3513636-21kworker/u8:4+flush-8:000:11:210
3222925995649,5cyclictest3466658-21kworker/u8:1+events_unbound23:26:170
3222927995549,4cyclictest3433900-21kworker/u8:3+flush-8:023:56:191
3222927995548,5cyclictest3433900-21kworker/u8:3+events_unbound23:01:081
3222925995549,4cyclictest3348825-21kworker/u8:3+flush-8:021:16:190
3222927995449,4cyclictest3327631-21kworker/u8:0+flush-8:021:26:241
3222927995449,4cyclictest3229992-21kworker/u8:0+flush-8:019:16:211
3222927995449,3cyclictest3433900-21kworker/u8:3+events_unbound22:56:121
3222925995450,3cyclictest3409432-21kworker/u8:2+flush-8:022:46:220
3222932995347,4cyclictest3327631-21kworker/u8:0+flush-8:020:51:182
3222927995346,5cyclictest3433900-21kworker/u8:3+flush-8:023:41:211
3222927995247,4cyclictest3513636-21kworker/u8:4+events_unbound00:31:201
3222927995247,4cyclictest2379441-21kworker/u8:4+events_unbound19:11:161
3222927995245,5cyclictest3433900-21kworker/u8:3+flush-8:023:16:191
3222927995245,5cyclictest3285539-21kworker/u8:1+flush-8:020:16:201
3222927995244,6cyclictest3285539-21kworker/u8:1+flush-8:021:01:191
3222925995248,3cyclictest3229992-21kworker/u8:0+events_unbound19:56:230
3222925995247,4cyclictest2379441-21kworker/u8:4+flush-8:019:11:220
3222925995246,5cyclictest3285539-21kworker/u8:1+flush-8:020:26:170
3222927995147,3cyclictest3466658-21kworker/u8:1+events_unbound23:36:221
3222927995146,4cyclictest3280015-21kworker/u8:3+flush-8:020:46:181
3222927995146,3cyclictest3348825-21kworker/u8:3+events_unbound21:31:121
3222927995046,3cyclictest3348825-21kworker/u8:3+events_unbound21:16:181
3222927995045,4cyclictest3327631-21kworker/u8:0+events_unbound22:31:081
3222927995045,4cyclictest3255320-21kworker/u8:2+flush-8:021:46:191
3222927995044,4cyclictest3255320-21kworker/u8:2+flush-8:020:56:181
3222925995045,4cyclictest3327631-21kworker/u8:0+events_unbound22:11:260
3222925995045,4cyclictest3280015-21kworker/u8:3+flush-8:020:06:260
3222925995045,3cyclictest3280015-21kworker/u8:3+flush-8:020:46:220
3222927994944,4cyclictest3466658-21kworker/u8:1+flush-8:023:46:181
3222925994944,4cyclictest3466658-21kworker/u8:1+flush-8:023:36:200
3222925994944,4cyclictest3433900-21kworker/u8:3+flush-8:023:06:240
3222925994944,4cyclictest3377163-21kworker/u8:3+flush-8:021:56:180
3222925994944,4cyclictest3377163-21kworker/u8:3+flush-8:021:56:170
3222925994940,6cyclictest3359544-21latency_hist21:25:000
3222927994844,3cyclictest3229992-21kworker/u8:0+events_unbound19:56:121
3222927994843,4cyclictest3513382-21kworker/u8:2+events_unbound00:16:241
3222927994843,4cyclictest3327631-21kworker/u8:0+flush-8:022:11:211
3222927994843,4cyclictest3285539-21kworker/u8:1+events_unbound21:06:071
3222925994842,4cyclictest3433900-21kworker/u8:3+flush-8:000:06:210
3222925994842,4cyclictest3255320-21kworker/u8:2+events_unbound19:51:110
3222925994837,8cyclictest282-21systemd-journal23:55:000
3222927994743,3cyclictest3473533-21kworker/u8:2+flush-8:023:21:241
3222927994742,4cyclictest3433900-21kworker/u8:3+events_unbound00:11:211
3222927994742,3cyclictest2385718-21kworker/u8:1+events_unbound19:46:111
3222927994741,4cyclictest3377163-21kworker/u8:3+flush-8:021:56:191
3222927994741,4cyclictest3377163-21kworker/u8:3+flush-8:021:56:191
3222925994743,3cyclictest3255320-21kworker/u8:2+flush-8:021:11:190
3222925994742,3cyclictest3285539-21kworker/u8:1+events_unbound21:01:070
3222925994741,4cyclictest3285539-21kworker/u8:1+flush-8:020:21:200
3222932994641,4cyclictest1855834-21kworker/u8:3+events_unbound19:15:032
3222932994640,5cyclictest3327631-21kworker/u8:0+events_unbound21:16:242
3222927994642,3cyclictest3255320-21kworker/u8:2+flush-8:019:41:131
3222927994640,5cyclictest3327631-21kworker/u8:0+flush-8:021:36:171
3222927994640,5cyclictest3327631-21kworker/u8:0+flush-8:021:36:171
3222927994640,4cyclictest3448183-21ntpq22:51:161
3222925994641,4cyclictest3433900-21kworker/u8:3+flush-8:023:16:230
3222925994641,4cyclictest3229992-21kworker/u8:0+events_unbound19:16:250
3222925994640,4cyclictest3377163-21kworker/u8:3+events_unbound22:01:180
3222925994640,4cyclictest3377163-21kworker/u8:3+events_unbound22:01:170
3222932994540,4cyclictest3348825-21kworker/u8:3+flush-8:021:11:232
3222927994541,3cyclictest3513382-21kworker/u8:2+events_unbound00:01:141
3222927994540,4cyclictest3433900-21kworker/u8:3+events_unbound23:06:121
3222927994540,4cyclictest3229992-21kworker/u8:0+flush-8:019:36:181
3222927994539,4cyclictest3280015-21kworker/u8:3+events_unbound20:06:101
3222925994540,3cyclictest3255320-21kworker/u8:2+events_unbound20:31:070
3222925994539,5cyclictest3409432-21kworker/u8:2+flush-8:022:36:190
3222925994539,5cyclictest3409432-21kworker/u8:2+flush-8:022:36:180
3222925994539,4cyclictest3409432-21kworker/u8:2+flush-8:022:21:190
3222932994440,3cyclictest3327631-21kworker/u8:0+events_unbound22:31:142
3222932994439,4cyclictest3409432-21kworker/u8:2+flush-8:022:51:222
3222927994439,3cyclictest3466658-21kworker/u8:1+flush-8:023:31:111
3222925994440,2cyclictest3394392-21kworker/u8:1+flush-8:022:26:180
33705092430,2sleep0201rcuc/021:36:120
33705092430,2sleep0201rcuc/021:36:120
3222932994338,4cyclictest3433900-21kworker/u8:3+events_unbound23:01:202
3222932994333,8cyclictest3260147-21cp19:45:012
3222927994339,3cyclictest3532605-21kworker/u8:0+flush-8:000:36:271
3222927994339,3cyclictest3394392-21kworker/u8:1+events_unbound22:21:091
3222927994338,4cyclictest3394392-21kworker/u8:1+flush-8:022:26:191
3222927994338,4cyclictest3377163-21kworker/u8:3+events_unbound22:01:201
3222927994338,4cyclictest3377163-21kworker/u8:3+events_unbound22:01:201
3222925994339,3cyclictest3285539-21kworker/u8:1+flush-8:021:06:180
3222925994338,4cyclictest3409432-21kworker/u8:2+flush-8:022:16:250
3222925994332,9cyclictest3454603-21diskstats23:01:080
3222932994238,3cyclictest3409432-21kworker/u8:2+events_unbound22:20:012
3222932994232,8cyclictest282-21systemd-journal19:13:272
3222927994238,3cyclictest3229992-21kworker/u8:0+events_unbound19:21:141
3222927994236,5cyclictest3285539-21kworker/u8:1+events_unbound20:26:061
3222925994237,4cyclictest3466658-21kworker/u8:1+flush-8:023:31:070
3222925994236,4cyclictest3229992-21kworker/u8:0+events_unbound19:36:120
3222932994132,7cyclictest282-21systemd-journal21:25:002
3222927994136,4cyclictest3255320-21kworker/u8:2+events_unbound19:51:151
3222927994135,5cyclictest3513636-21kworker/u8:4+events_unbound00:26:121
3222927994134,5cyclictest3486473-21kworker/u8:0+events_unbound23:51:221
3222925994136,4cyclictest3280015-21kworker/u8:3+events_unbound20:36:200
3222925994136,4cyclictest3255320-21kworker/u8:2+flush-8:019:46:180
3222925994131,7cyclictest282-21systemd-journal00:40:000
3222927994033,6cyclictest3327631-21kworker/u8:0+events_unbound21:51:091
3222927994033,6cyclictest3327631-21kworker/u8:0+events_unbound21:51:091
3222925994036,3cyclictest3433900-21kworker/u8:3+events_unbound23:41:090
3222925994035,4cyclictest3229992-21kworker/u8:0+events_unbound19:31:240
3222925994031,7cyclictest3503503-21latency_hist23:50:010
3222932993928,8cyclictest3389495-21cat21:55:012
3222932993928,8cyclictest3389495-21cat21:55:012
3222927993934,4cyclictest3327631-21kworker/u8:0+events_unbound22:16:111
3222927993934,4cyclictest3255320-21kworker/u8:2+flush-8:020:11:181
3222925993935,3cyclictest2385718-21kworker/u8:1+events_unbound19:29:070
3222925993934,4cyclictest3327631-21kworker/u8:0+flush-8:021:41:140
3222925993934,4cyclictest3327631-21kworker/u8:0+flush-8:021:41:140
3222925993934,4cyclictest3285539-21kworker/u8:1+flush-8:020:41:200
3222925993933,4cyclictest3285539-21kworker/u8:1+flush-8:020:51:130
3222927993834,3cyclictest3255320-21kworker/u8:2+flush-8:021:21:231
3222925993833,4cyclictest3433900-21kworker/u8:3+events_unbound22:45:000
3222925993833,4cyclictest3433900-21kworker/u8:3+events_unbound22:45:000
3222925993831,5cyclictest3327631-21kworker/u8:0+flush-8:022:06:210
32224912383,31sleep20-21swapper/219:06:462
3222932993733,3cyclictest3255320-21kworker/u8:2+events_unbound19:49:592
3222925993733,3cyclictest3255320-21kworker/u8:2+events_unbound20:56:080
3222927993630,4cyclictest3314931-21latency_hist20:40:011
3222925993632,3cyclictest3473533-21kworker/u8:2+flush-8:023:21:200
3222925993632,3cyclictest3239531-21systemd19:23:510
3222925993630,4cyclictest3255320-21kworker/u8:2+events_unbound20:11:200
32224852364,11sleep10-21swapper/119:06:411
3222932993530,4cyclictest3486473-21kworker/u8:0+flush-8:023:31:162
3222932993526,7cyclictest3245234-21apt-get19:31:042
3222932993526,7cyclictest282-21systemd-journal22:45:002
3222932993526,7cyclictest282-21systemd-journal22:45:002
3222927993528,5cyclictest3327631-21kworker/u8:0+events_unbound22:06:101
3222925993531,3cyclictest3327631-21kworker/u8:0+events_unbound21:51:190
3222925993531,3cyclictest3327631-21kworker/u8:0+events_unbound21:51:190
3222925993529,5cyclictest3433900-21kworker/u8:3+flush-8:023:56:190
3222927993427,5cyclictest3275689-21apt-get20:01:041
3222932993329,3cyclictest3255320-21kworker/u8:2+flush-8:019:56:252
3222927993328,3cyclictest3255320-21kworker/u8:2+events_unbound20:31:141
3222927993327,3cyclictest3433900-21kworker/u8:3+flush-8:022:46:111
3222925993328,4cyclictest3409432-21kworker/u8:2+events_unbound22:51:090
3222925993328,4cyclictest3327631-21kworker/u8:0+events_unbound21:26:240
3222925993328,3cyclictest3433900-21kworker/u8:3+events_unbound22:56:220
3222925993327,4cyclictest3255320-21kworker/u8:2+events_unbound21:46:130
3222925993326,5cyclictest3513737-21aten2_r5power_c00:01:070
33995422320,8sleep30-21swapper/322:05:013
33995422320,8sleep30-21swapper/322:05:013
3222932993224,6cyclictest282-21systemd-journal21:45:002
3222932993224,6cyclictest282-21systemd-journal21:45:002
3222927993228,3cyclictest3229992-21kworker/u8:0+events_unbound19:31:081
3222925993227,3cyclictest2385718-21kworker/u8:1+events_unbound20:01:140
3222925993226,4cyclictest3285539-21kworker/u8:1+events_unbound20:16:100
3222932993127,3cyclictest3532605-21kworker/u8:0+events_unbound00:16:282
3222932993126,3cyclictest3255320-21kworker/u8:2+events_unbound20:11:162
3222927993122,7cyclictest3467978-21ntpq23:11:171
3222925993123,6cyclictest3543066-21latency_hist00:30:010
3222925993122,7cyclictest3464510-21fschecks_count23:11:080
3222932993026,3cyclictest3255320-21kworker/u8:2+events_unbound21:46:252
3222932993025,4cyclictest3513636-21kworker/u8:4+events_unbound00:06:282
3222932993025,3cyclictest2385718-21kworker/u8:1+flush-8:020:01:242
3222932993022,6cyclictest282-21systemd-journal23:59:232
3222925993026,3cyclictest3327631-21kworker/u8:0+events_unbound21:31:260
3222925993023,6cyclictest3532801-21unixbench_singl00:16:280
33894402290,6sleep3451irq_work/321:55:013
33894402290,6sleep3451irq_work/321:55:013
3222932992919,7cyclictest3393528-21ntpq21:56:172
3222932992919,7cyclictest3393528-21ntpq21:56:162
3222925992925,3cyclictest3513636-21kworker/u8:4+flush-8:000:21:440
3222932992824,2cyclictest3239299-21unixbench_singl19:21:252
3222932992723,3cyclictest3513636-21kworker/u8:4+events_unbound00:15:012
3222932992723,3cyclictest3443777-21unixbench_singl22:46:242
3222932992617,7cyclictest282-21systemd-journal22:30:012
3222932992522,2cyclictest3538519-21aten2_r5power_e00:26:082
3222932992522,2cyclictest3537797-21unixbench_singl00:21:262
3222932992521,3cyclictest3466658-21kworker/u8:1+events_unbound23:40:402
3222932992521,2cyclictest3335161-21aten2_r5power_e21:01:062
3222932992521,2cyclictest0-21swapper/219:55:002
3222932992520,3cyclictest3305425-21aten2_r5power_p20:31:062
3222932992516,7cyclictest3552992-21awk00:40:002
3222927992520,3cyclictest3513636-21kworker/u8:4+events_unbound00:21:141
3222932992421,2cyclictest3404629-21aten2_r5power_c22:11:082
3222932992421,2cyclictest3250346-21aten2_r5power_v19:36:072
3222932992419,3cyclictest3295762-21fschecks_count20:21:112
3222932992418,4cyclictest3478752-21cron23:25:002
32182412242,14sleep03218323-21/usr/sbin/munin19:06:070
3222932992318,4cyclictest3280015-21kworker/u8:3+events_unbound20:40:062
3222932992318,3cyclictest3466658-21kworker/u8:1+events_unbound23:25:072
3222932992318,3cyclictest3398996-21unixbench_singl22:01:242
3222932992318,3cyclictest3398996-21unixbench_singl22:01:242
322293299230,9cyclictest3503059-21sed23:46:232
33138562220,7sleep3586-21kworker/3:2+mm_percpu_wq20:36:153
3222932992219,1cyclictest282-21systemd-journal21:30:002
3222932992218,2cyclictest3469405-21cpuspeed_turbos23:16:072
3222932992218,2cyclictest0-21swapper/221:10:002
3222932992211,9cyclictest3370011-21diskstats21:36:082
3222932992211,9cyclictest3370011-21diskstats21:36:082
3222932992117,2cyclictest3365041-21cpuspeed_turbos21:31:072
3222932992116,4cyclictest3409432-21kworker/u8:2+events_unbound22:20:042
3222932992110,8cyclictest3240209-21apt-get19:26:032
322293299202,13cyclictest3503826-21apt-get23:51:062
3222932992016,2cyclictest282-21systemd-journal22:40:002
3222932992016,2cyclictest282-21systemd-journal22:39:592
3222932992015,4cyclictest3255320-21kworker/u8:2+flush-8:020:15:352
322293299195,12cyclictest3330635-21irqcore20:56:122
322293299192,12cyclictest3320232-21apt-get20:46:052
322293299188,7cyclictest3493762-21grep23:40:012
3222932991814,2cyclictest3310523-21cpuspeed_turbos20:36:072
3222932991814,2cyclictest0-21swapper/220:26:112
32225252183,8sleep30-21swapper/319:07:113
33566262170,2sleep3586-21kworker/3:2+events21:21:143
322293299171,12cyclictest3280626-21apt-get20:06:082
3222932991613,2cyclictest0-21swapper/223:05:542
3222932991613,2cyclictest0-21swapper/200:30:382
322293299161,12cyclictest3399666-21apt-get22:06:082
34384682150,2chrt586-21kworker/3:2-events22:41:213
34384682150,2chrt586-21kworker/3:2-events22:41:213
34898402143,8sleep30-21swapper/323:36:163
34688342142,8sleep30-21swapper/323:15:013
34505002144,6sleep30-21swapper/322:56:143
35430772132,6sleep30-21swapper/300:30:013
34829472133,7sleep30-21swapper/323:26:193
34453372132,7sleep30-21swapper/322:51:123
33496522132,6sleep30-21swapper/321:15:013
32902342132,6sleep30-21swapper/320:15:013
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32498892132,7sleep30-21swapper/319:34:593
35529652122,7sleep30-21swapper/300:40:013
35288982122,6sleep30-21swapper/300:16:123
35244372122,6sleep30-21swapper/300:11:153
35224442122,6sleep30-21swapper/300:06:213
35140842122,5sleep30-21swapper/300:01:123
35132292122,6sleep30-21swapper/323:58:473
34837252122,6sleep30-21swapper/323:30:023
34744732122,6sleep30-21swapper/323:21:113
34694252123,5sleep30-21swapper/323:16:093
34589672122,6sleep30-21swapper/323:05:013
34438272122,6sleep30-21swapper/322:46:313
34262222122,6sleep30-21swapper/322:31:143
34234782122,6sleep30-21swapper/322:26:253
34095392122,6sleep30-21swapper/322:16:093
34048532122,5sleep30-21swapper/322:11:113
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33897452122,6sleep30-21swapper/321:56:033
33799062123,6sleep30-21swapper/321:46:113
33744722122,5sleep30-21swapper/321:40:013
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33743502122,6sleep30-21swapper/321:39:573
33743502122,6sleep30-21swapper/321:39:573
33651792122,6sleep30-21swapper/321:31:103
33635622121,7sleep30-21swapper/321:26:213
33248252122,6sleep30-21swapper/320:50:013
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33152062122,6sleep30-21swapper/320:40:303
33093292122,6sleep30-21swapper/320:31:233
32706942122,6sleep30-21swapper/319:56:073
32652262122,6sleep30-21swapper/319:50:013
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32343412122,6sleep30-21swapper/319:16:263
32274532122,6sleep30-21swapper/319:11:253
35384712112,5sleep30-21swapper/300:26:083
35337322112,6sleep30-21swapper/300:21:103
35078122112,5sleep30-21swapper/323:51:253
34988682112,6sleep30-21swapper/323:46:033
34938622113,5sleep30-21swapper/323:40:253
34300512112,5sleep30-21swapper/322:36:123
34300512112,5sleep30-21swapper/322:36:123
34144332112,5sleep30-21swapper/322:20:073
33997252112,5sleep30-21swapper/322:06:103
33404552112,6sleep30-21swapper/321:06:103
33350772112,5sleep30-21swapper/321:01:053
33301072112,5sleep30-21swapper/320:56:063
33008812112,5sleep30-21swapper/320:26:093
32954722112,5sleep30-21swapper/320:21:073
32858252112,5sleep30-21swapper/320:11:083
32805532112,5sleep30-21swapper/320:05:293
32554362112,5sleep30-21swapper/319:41:063
32502072112,5sleep30-21swapper/319:36:053
32401392112,5sleep30-21swapper/319:25:293
32355432112,5sleep30-21swapper/319:21:123
34592072102,5sleep30-21swapper/323:05:053
33449182102,5sleep30-21swapper/321:10:043
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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