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2026-08-05 - 01:00

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #6

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 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.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes
Compare latency of primary with shadow system
Characteristics of the 792 highest latencies:
System rackeslot6s.osadl.org (updated Tue Aug 04, 2026 12:44:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3888390997250,17cyclictest0-21swapper/107:10:011
3888390997244,23cyclictest3910376-21munin-plugin-st09:15:001
3888390996726,33cyclictest0-21swapper/111:15:281
388839099661,43cyclictest0-21swapper/110:25:011
3888390996328,31cyclictest3913695-21grep09:30:291
3888390996321,33cyclictest0-21swapper/110:20:191
388839099631,55cyclictest3945268-21sshd12:39:021
3888390996219,37cyclictest0-21swapper/107:55:291
3888390996119,36cyclictest0-21swapper/108:10:011
388839099601,4cyclictest0-21swapper/109:30:011
388838799595,22cyclictest15-21rcuc/007:35:010
388838799595,22cyclictest15-21rcuc/007:35:010
388839099583,47cyclictest3925121-21cut10:40:211
388839099582,47cyclictest3914822-21apt-get09:40:161
388839099582,10cyclictest3908860-21cat09:05:011
3888390995625,26cyclictest3893954-21sshd07:40:011
388839099562,13cyclictest3926635-21apt-get10:50:151
3888390995527,21cyclictest0-21swapper/108:15:031
3888390995511,36cyclictest0-21swapper/110:00:261
388839099546,39cyclictest3924625-21grep10:35:301
388839099542,8cyclictest3912165-21latency_hist09:25:011
3888390995427,21cyclictest3930688-21grep11:10:271
388839099542,44cyclictest3895573-21apt-get07:50:051
388839099542,14cyclictest3919877-21apt-get10:10:171
3888387995447,4cyclictest167350irq/118-8000000.ethernet-tx011:50:290
388839199539,13cyclictest3904592-21/usr/sbin/munin08:40:192
388839099536,37cyclictest0-21swapper/107:35:021
388839099536,37cyclictest0-21swapper/107:35:011
388839099533,42cyclictest3941699-21grep12:15:271
388839099532,11cyclictest3932764-21fschecks_count11:25:201
388839099531,11cyclictest3942036-21apt-get12:20:161
388839099524,38cyclictest3905768-21phc2sys08:45:261
388839099523,40cyclictest3890315-21cron07:20:001
3888390995230,19cyclictest167450irq/126-8000000.ethernet-tx107:45:161
388839099522,9cyclictest3901214-21/usr/sbin/munin08:20:301
388839099522,6cyclictest3936953-21/usr/sbin/munin11:50:311
388839099522,42cyclictest3933746-21/usr/sbin/munin11:30:221
388839099522,40cyclictest3925954-21sh10:45:201
388839099521,7cyclictest3916769-21/usr/sbin/munin09:50:251
388839099521,7cyclictest3916769-21/usr/sbin/munin09:50:251
3888390995212,31cyclictest0-21swapper/111:45:201
3888390995212,31cyclictest0-21swapper/111:45:201
388839099514,39cyclictest0-21swapper/112:25:181
388839099513,40cyclictest3935779-21grep11:40:311
388839099512,7cyclictest3919182-21grep10:05:181
388839099512,4cyclictest3914261-21/usr/sbin/munin09:35:261
388839099511,44cyclictest0-21swapper/107:44:041
3888390995113,30cyclictest0-21swapper/107:20:221
388839099505,36cyclictest0-21swapper/107:15:011
388839099502,40cyclictest3928099-21tail10:55:321
388839099502,40cyclictest3902594-21grep08:25:301
388839099501,7cyclictest3909457-21/usr/sbin/munin09:05:301
388838799503,14cyclictest15-21rcuc/008:25:020
388838799501,26cyclictest0-21swapper/009:10:010
3888391994938,7cyclictest3907847-21sendmail09:00:002
388839099494,36cyclictest0-21swapper/108:55:221
388839099493,38cyclictest3932342-21tail11:20:301
388839099493,38cyclictest3900813-21grep08:15:291
388839099493,38cyclictest3900813-21grep08:15:291
388839099493,37cyclictest3903069-21sh08:30:211
388839099493,37cyclictest3903069-21sh08:30:211
388839099493,36cyclictest3917915-21grep09:55:301
388839099493,35cyclictest0-21swapper/110:15:221
388839099493,35cyclictest0-21swapper/110:15:221
388839099492,37cyclictest3944296-21unixbench_singl12:30:301
388839099492,37cyclictest3929070-21latency_hist11:05:011
388839099491,9cyclictest3939221-21grep12:00:301
388839099491,9cyclictest3904086-21/usr/sbin/munin08:35:261
3888390994914,29cyclictest3911201-21sshd09:18:001
388839099491,38cyclictest3906956-21grep08:50:291
388839099491,38cyclictest1261-21rs:main1
3888387994942,4cyclictest167350irq/118-8000000.ethernet-tx009:10:250
3888391994836,8cyclictest0-21swapper/209:10:312
388839099483,37cyclictest3923784-21grep10:30:271
388839099482,37cyclictest3891937-21grep07:25:301
388839099482,36cyclictest3929797-21grep11:05:301
388839099482,11cyclictest3934330-21apt-get11:35:171
3888387994841,4cyclictest167350irq/118-8000000.ethernet-tx008:50:170
388838799482,39cyclictest0-21swapper/011:20:020
3888387994811,8cyclictest3935822-21apt-get11:45:010
3888391994736,7cyclictest3944566-21grep12:35:012
388839099472,3cyclictest3939494-21apt-get12:05:141
388839099472,36cyclictest3916253-21grep09:45:291
3888387994736,8cyclictest3926433-21munin-plugin-st10:50:000
3888387994734,10cyclictest0-21swapper/007:15:010
388838799471,2cyclictest0-21swapper/010:20:010
388838799471,2cyclictest0-21swapper/010:20:010
388839099461,37cyclictest3905128-21grep08:40:281
388839099461,34cyclictest3937894-21lsblk11:55:211
3888387994636,6cyclictest3902694-21grep08:30:000
388839199458,7cyclictest3909426-21unixbench_multi09:05:302
388839199454,20cyclictest0-21swapper/209:55:012
388839199454,20cyclictest0-21swapper/209:55:012
3888391994531,9cyclictest0-21swapper/211:30:302
388839099451,36cyclictest3940868-21unixbench_multi12:10:281
388839099451,36cyclictest3940868-21unixbench_multi12:10:281
388838799455,3cyclictest0-21swapper/012:05:020
388838799455,16cyclictest3927270-21apt-get10:55:010
3888387994536,5cyclictest20850irq/208-8000000.ethernet08:50:010
3888387994532,10cyclictest3911223-21latency_hist09:20:000
388838799451,4cyclictest0-21swapper/012:15:010
388838799451,4cyclictest0-21swapper/012:15:010
3888387994437,4cyclictest167350irq/118-8000000.ethernet-tx008:10:280
388838799441,40cyclictest3934654-21tail11:35:270
3888391994335,5cyclictest3916254-21grep09:45:292
3888387994336,5cyclictest3919674-21munin-plugin-st10:10:000
3888387994330,8cyclictest0-21swapper/008:10:010
3888391994231,7cyclictest3897309-21grep07:55:312
3888387994234,5cyclictest0-21swapper/007:40:300
3888387994233,7cyclictest0-21swapper/007:20:170
3888387994225,15cyclictest3929782-21unixbench_multi11:05:300
3888387994224,15cyclictest131ktimers/007:25:150
388838799421,4cyclictest0-21swapper/012:10:010
388839199415,17cyclictest3935184-21/usr/sbin/munin11:40:212
388839199411,32cyclictest0-21swapper/209:20:272
388838799413,4cyclictest3936287-21sh11:45:200
388838799413,4cyclictest3936287-21sh11:45:200
3888387994134,4cyclictest20850irq/208-8000000.ethernet11:00:010
3888387994128,9cyclictest3928957-21grep11:00:290
388838799412,4cyclictest3902953-21df08:30:170
388838799412,4cyclictest3902953-21df08:30:170
388838799411,9cyclictest274-21systemd-journal09:00:010
388838799411,38cyclictest3897628-21df_inode08:00:180
388838799411,38cyclictest0-21swapper/009:20:180
388838799411,37cyclictest0-21swapper/012:15:180
3888391994033,4cyclictest3931593-21sendmail11:20:002
3888391994032,4cyclictest3917984-21sendmail10:00:002
3888391994032,4cyclictest167550irq/134-8000000.ethernet-tx212:20:002
3888391994031,5cyclictest167550irq/134-8000000.ethernet-tx208:05:232
3888391994030,6cyclictest3915369-21grep09:40:292
3888391994028,8cyclictest0-21swapper/212:10:292
3888391994028,8cyclictest0-21swapper/212:10:282
388839199401,32cyclictest0-21swapper/208:45:212
3888387994032,4cyclictest167350irq/118-8000000.ethernet-tx012:25:000
3888387994023,15cyclictest0-21swapper/008:15:180
3888387994023,15cyclictest0-21swapper/008:15:170
388838799401,4cyclictest3921648-21diskstats10:20:190
388838799401,36cyclictest0-21swapper/010:40:250
3888391993929,7cyclictest0-21swapper/211:05:002
3888391993925,10cyclictest0-21swapper/208:25:282
388838799394,4cyclictest3905342-21sshd08:45:010
3888387993933,3cyclictest167350irq/118-8000000.ethernet-tx010:25:130
388838799391,9cyclictest0-21swapper/010:15:000
388838799391,4cyclictest3938531-21date12:00:020
388838799391,36cyclictest0-21swapper/007:45:220
388838799391,2cyclictest0-21swapper/011:35:000
3888391993830,4cyclictest167550irq/134-8000000.ethernet-tx207:50:282
3888391993827,7cyclictest0-21swapper/211:45:272
3888391993827,7cyclictest0-21swapper/211:45:272
3888387993833,2cyclictest0-21swapper/009:00:210
3888387993830,5cyclictest3893699-21latency_hist07:40:000
3888387993827,6cyclictest131ktimers/007:55:300
388838799381,35cyclictest0-21swapper/009:40:200
388838799381,34cyclictest3903802-21df08:35:170
3888387993813,17cyclictest0-21swapper/010:40:000
388838799381,2cyclictest0-21swapper/011:25:200
388838799381,2cyclictest0-21swapper/007:10:010
3888391993729,4cyclictest3900852-21grep08:15:292
3888391993729,4cyclictest3900852-21grep08:15:292
3888391993729,4cyclictest167550irq/134-8000000.ethernet-tx207:15:252
3888391993726,7cyclictest0-21swapper/208:00:292
3888387993733,2cyclictest0-21swapper/010:00:000
388838799371,34cyclictest0-21swapper/012:30:000
388838799371,34cyclictest0-21swapper/011:20:160
388838799371,2cyclictest0-21swapper/009:30:010
3888391993629,4cyclictest3903526-21cron08:35:012
3888391993629,4cyclictest3903526-21cron08:35:002
3888391993625,6cyclictest0-21swapper/210:55:022
3888391993624,7cyclictest3938329-21grep11:55:302
3888391993624,7cyclictest3913688-21grep09:30:282
3888391993623,7cyclictest0-21swapper/210:40:282
3888391993620,9cyclictest3914605-21run-parts09:40:002
388839199361,29cyclictest0-21swapper/210:30:252
3888387993630,4cyclictest20850irq/208-8000000.ethernet09:35:200
3888387993630,4cyclictest0-21swapper/012:30:200
3888387993625,9cyclictest3890327-21sendmail07:20:000
3888387993624,10cyclictest131ktimers/007:50:110
3888387993620,14cyclictest0-21swapper/009:45:310
388838799361,33cyclictest0-21swapper/010:31:110
388838799361,33cyclictest0-21swapper/009:50:150
388838799361,33cyclictest0-21swapper/009:50:150
3888391993527,4cyclictest0-21swapper/210:25:272
3888391993527,4cyclictest0-21swapper/210:15:002
3888391993524,6cyclictest0-21swapper/207:15:012
388839199351,28cyclictest0-21swapper/211:20:312
388839199351,28cyclictest0-21swapper/207:45:132
3888391993512,5cyclictest8321systemd-network08:20:222
388838799351,7cyclictest3945043-21ps12:35:290
388838799351,3cyclictest0-21swapper/009:32:430
388838799351,32cyclictest0-21swapper/010:04:020
3888391993425,4cyclictest0-21swapper/207:45:002
388839199342,4cyclictest3918453-21irqstats10:00:272
3888391993424,7cyclictest3912279-21/usr/sbin/munin09:25:212
3888391993422,7cyclictest0-21swapper/207:25:302
3888391993420,9cyclictest3924616-21grep10:35:302
3888391993325,4cyclictest167550irq/134-8000000.ethernet-tx212:00:302
3888391993325,4cyclictest167550irq/134-8000000.ethernet-tx208:35:252
3888391993324,5cyclictest0-21swapper/210:20:282
3888391993317,8cyclictest0-21swapper/212:25:222
388839199331,27cyclictest0-21swapper/209:15:182
3888387993324,5cyclictest20650irq/252-8000000.ethernet11:10:250
3888391993223,5cyclictest3929819-21grep11:05:292
3888391993223,5cyclictest0-21swapper/210:55:312
3888391993221,6cyclictest3906917-21grep08:50:292
388839199321,26cyclictest0-21swapper/212:20:182
388839199321,26cyclictest0-21swapper/211:25:262
3888391993120,7cyclictest0-21swapper/212:35:222
3888391993023,4cyclictest0-21swapper/207:40:012
3888391993022,5cyclictest3934323-21sshd11:35:022
3888391993021,6cyclictest0-21swapper/210:15:272
3888391993021,6cyclictest0-21swapper/210:15:272
3888391992921,4cyclictest0-21swapper/211:10:272
3888391992921,4cyclictest0-21swapper/210:45:262
3888391992917,7cyclictest3919405-21ps10:05:262
388839199291,23cyclictest0-21swapper/209:03:012
3888391992819,6cyclictest311ktimers/207:10:012
3888391992619,4cyclictest3891082-21grep07:20:292
3888391992617,4cyclictest311ktimers/212:05:112
3888391992615,7cyclictest0-21swapper/211:50:262
3888391992413,7cyclictest0-21swapper/207:30:292
3888391992413,7cyclictest0-21swapper/207:30:292
3888391992411,9cyclictest0-21swapper/208:10:222
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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