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2026-05-21 - 00:24

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 Wed May 20, 2026 12:59:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
82019912171193,20cyclictest7131-21perl10:10:151
82009912111173,27cyclictest0-21swapper/007:25:120
82019911501132,14cyclictest8369-21grep07:25:111
79082649602,32sleep10-21swapper/107:22:311
79812489442,32sleep00-21swapper/007:23:140
167242790,2sleep016725-21mailstats12:00:280
8201996111,17cyclictest2419-21runrttasks09:57:591
8201996011,15cyclictest32387-21runrttasks12:44:031
8201995910,17cyclictest8693-21runrttasks08:49:481
8201995910,15cyclictest32539-21runrttasks11:17:061
820199587,17cyclictest881-21chrt08:28:051
8201995813,15cyclictest9066-21cat10:15:171
8201995812,17cyclictest10718-21df10:20:141
8201995811,15cyclictest2695-21snmpd08:33:541
8201995811,15cyclictest11313-21grep07:30:161
8201995810,16cyclictest19280-21runrttasks12:09:471
8201995810,15cyclictest17350-21chrt10:35:391
820199579,14cyclictest4748-21sshd08:38:031
820199579,14cyclictest4748-21sshd08:38:021
8201995718,9cyclictest10642-21cat11:45:161
8201995713,14cyclictest1046-21ntp_states12:45:261
8201995712,16cyclictest30781-21open_files08:20:251
8201995712,15cyclictest18999-21cat07:50:181
8201995711,16cyclictest23250-21chrt08:00:251
8201995711,14cyclictest13811-21chrt10:27:531
8201995710,15cyclictest2883-21/usr/sbin/munin10:00:251
8200995753,2cyclictest0-21swapper/010:10:150
8201995611,15cyclictest26801-21cron11:00:591
8201995611,14cyclictest29698-21sh12:35:241
8201995610,15cyclictest5988-21sshd11:33:371
8201995610,15cyclictest25492-21grep08:05:281
820199558,14cyclictest5055-21sh10:05:121
820199558,14cyclictest5055-21sh10:05:121
8201995520,11cyclictest19550-21users09:15:281
8201995515,15cyclictest20794-21mailstats10:45:261
8201995511,15cyclictest18243-21df10:40:121
8201995511,13cyclictest29231-21/usr/sbin/munin11:10:221
820199548,15cyclictest29415-21chrt09:44:581
8201995411,16cyclictest26413-21grep09:35:191
8201995410,16cyclictest24684-21runrttasks12:22:101
820199537,15cyclictest3999-21chrt11:27:251
8201995312,14cyclictest12958-21smartctl-wrappe11:50:261
8201995311,19cyclictest26991-21/usr/sbin/munin12:30:171
8201995311,15cyclictest16307-21grep12:00:181
8201995310,16cyclictest32303-21awk09:50:241
8201995310,15cyclictest17244-21ntpq09:10:241
8201995310,14cyclictest2695-21snmpd09:34:061
8201995210,16cyclictest15202-21which07:40:171
8201995119,10cyclictest26992-21ntpq08:10:251
8201995114,11cyclictest15465-21runrttasks10:30:341
8201995111,15cyclictest6749-21runrttasks08:44:071
8201995111,11cyclictest6586-21/usr/sbin/munin11:35:151
820199508,14cyclictest17081-21smartctl07:45:181
8201995014,22cyclictest40250irq/92-i91512:15:231
8201995011,14cyclictest28878-21awk08:15:261
820199498,17cyclictest21965-21runrttasks07:57:141
820199498,14cyclictest20488-21smartctl12:10:271
820199497,14cyclictest8189-21/usr/sbin/munin11:40:121
8201994919,9cyclictest40250irq/92-i91509:26:451
8201994910,18cyclictest28788-21runrttasks11:07:091
820199489,15cyclictest2654-21sshd09:08:101
820199489,15cyclictest24600-21smartctl10:55:281
820199487,22cyclictest14337-21runrttasks07:38:081
8201994713,18cyclictest9040-21cpuspeed_turbos08:50:121
8201994712,9cyclictest11586-21ntp_states08:55:241
8201994710,15cyclictest12659-21/usr/sbin/munin09:00:321
8201994616,18cyclictest15525-21seq11:59:581
8201994613,11cyclictest2695-21snmpd10:50:131
8201994612,12cyclictest26094-21chrt12:25:271
8201994611,16cyclictest30992-21runrttasks09:46:511
820199458,14cyclictest20185-21/usr/sbin/munin09:20:131
820199457,13cyclictest543-21/usr/sbin/munin11:20:201
8201994523,17cyclictest2414-21diskstats12:50:141
820099407,7cyclictest7756-21needreboot08:45:230
820099381,22cyclictest14267-21cron09:04:000
820099379,13cyclictest11565-21gdbus10:09:140
820099379,13cyclictest11565-21gdbus10:09:140
820099373,11cyclictest81rcu_preempt07:42:480
820099371,22cyclictest483-21wc11:20:010
8200993626,6cyclictest11032-21irqstats10:20:210
820099361,14cyclictest0-21swapper/009:26:310
232552360,2sleep023254-21aten_r4power_cu12:20:090
8200993511,8cyclictest17180-21iostat_ios07:45:200
820099351,11cyclictest0-21swapper/011:33:160
8200993413,6cyclictest32311-21hddtemp_smartct08:25:180
820099338,11cyclictest19366-21latency_hist12:10:010
8200993327,4cyclictest3-21ksoftirqd/007:51:140
172412330,11sleep0820099cyclictest09:10:230
820099329,5cyclictest11378-21hddtemp_smartct07:30:160
820099326,13cyclictest0-21swapper/008:15:480
8200993214,5cyclictest14067-21users07:35:280
8200993212,7cyclictest3389-21hddtemp_smartct10:00:160
820099311,4cyclictest81rcu_preempt11:49:260
820099311,4cyclictest81rcu_preempt09:34:230
820099311,11cyclictest1467-21grep12:45:300
88812301,3sleep08910-21aten_r4power_en08:50:110
820099303,4cyclictest81rcu_preempt08:24:220
820099303,13cyclictest1831-21iostat08:30:180
820099302,15cyclictest25120-21ntp_states08:05:250
8200993020,6cyclictest21730-21wget10:50:100
8200993020,5cyclictest30831-21grep09:45:280
820099301,5cyclictest81rcu_preempt10:19:290
820099301,4cyclictest81rcu_preempt12:11:300
820099301,4cyclictest81rcu_preempt11:55:310
820099301,4cyclictest81rcu_preempt11:22:400
820099301,4cyclictest81rcu_preempt09:43:000
820099301,4cyclictest81rcu_preempt09:22:070
8200993012,6cyclictest27481-21/usr/sbin/munin12:30:160
8200993012,6cyclictest26462-21diskstats08:10:150
8200993012,6cyclictest14462-21df10:30:120
8200993012,5cyclictest2732-21irqstats12:50:190
820099301,24cyclictest14861-21fschecks_count09:05:150
820099300,4cyclictest81rcu_preempt11:28:450
820099291,17cyclictest0-21swapper/010:55:290
8200992911,6cyclictest18328-21cut10:40:150
820099291,14cyclictest12387-21wget10:25:110
8200992910,7cyclictest17359-21taskset10:35:450
820099290,4cyclictest81rcu_preempt12:29:540
820099290,4cyclictest81rcu_preempt08:01:500
46622291,5sleep00-21swapper/008:37:110
46622291,5sleep00-21swapper/008:37:100
820099282,13cyclictest6586-21/usr/sbin/munin11:35:150
820099282,13cyclictest29831-21irqstats11:10:200
820099282,13cyclictest25821-21aten_r4power_cu09:35:110
820099282,13cyclictest19563-21vmstat09:15:290
820099281,4cyclictest81rcu_preempt12:17:580
820099281,23cyclictest5535-21fschecks_time08:40:160
820099281,14cyclictest8672-21tune2fs11:40:160
820099281,14cyclictest20206-21grep10:45:150
8200992810,6cyclictest30759-21taskset12:40:070
8200992810,5cyclictest0-21swapper/009:55:150
3872281,5sleep00-21swapper/009:51:420
302302281,5sleep00-21swapper/012:36:230
820099277,11cyclictest0-21swapper/011:50:180
820099272,4cyclictest81rcu_preempt07:56:340
820099271,13cyclictest25970-21/usr/sbin/munin11:00:180
820099262,12cyclictest28835-21runrttasks11:07:390
8200992614,7cyclictest11563-21ntpdc08:55:230
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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