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2026-07-23 - 17:00

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 792 highest latencies:
System rack9slot4s (updated Thu Jul 23, 2026 12:59:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
229429912661231,15cyclictest23835-21strings07:25:220
229439910871064,20cyclictest23685-21irqstats07:25:201
216692626579,32sleep00-21swapper/007:20:170
225172527514,8sleep10-21swapper/107:21:061
1437121330,4sleep114373-21unixbench_singl12:40:271
18212890,8sleep02294299cyclictest09:15:290
22943995024,11cyclictest22-21ksoftirqd/108:00:101
22943994715,5cyclictest22-21ksoftirqd/108:35:261
22943994611,7cyclictest29898-21fschecks_time07:40:151
22943994424,4cyclictest22-21ksoftirqd/110:20:151
2294399437,6cyclictest22-21ksoftirqd/112:35:211
2294399437,6cyclictest22-21ksoftirqd/111:55:261
2294399437,6cyclictest22-21ksoftirqd/108:55:141
2294399437,6cyclictest22-21ksoftirqd/108:50:181
2294399436,6cyclictest22-21ksoftirqd/108:20:291
22943994323,4cyclictest22-21ksoftirqd/111:00:181
22943994323,4cyclictest22-21ksoftirqd/109:35:211
2294399429,6cyclictest22-21ksoftirqd/112:25:121
2294399427,6cyclictest22-21ksoftirqd/111:50:121
2294399427,6cyclictest22-21ksoftirqd/110:45:161
2294399427,5cyclictest22-21ksoftirqd/108:15:251
2294399427,5cyclictest15741-21aten_r4power_cu09:55:091
22943994223,4cyclictest22-21ksoftirqd/111:30:121
22943994223,4cyclictest22-21ksoftirqd/110:25:151
22943994222,4cyclictest22-21ksoftirqd/109:45:271
22943994222,10cyclictest22-21ksoftirqd/108:25:201
22943994210,4cyclictest81rcu_preempt09:30:241
2294399417,6cyclictest22-21ksoftirqd/112:09:561
2294399416,6cyclictest22-21ksoftirqd/111:05:121
2294399416,6cyclictest22-21ksoftirqd/109:00:211
22943994127,4cyclictest22-21ksoftirqd/108:40:161
22943994127,4cyclictest22-21ksoftirqd/107:35:161
22943994126,4cyclictest22-21ksoftirqd/110:15:141
22943994126,4cyclictest22-21ksoftirqd/109:25:121
22943994126,4cyclictest22-21ksoftirqd/109:10:161
22943994125,4cyclictest22-21ksoftirqd/109:40:151
22943994125,4cyclictest22-21ksoftirqd/107:55:241
22943994123,4cyclictest22-21ksoftirqd/109:20:161
22943994122,4cyclictest22-21ksoftirqd/112:20:201
22943994122,4cyclictest22-21ksoftirqd/112:15:131
2294399406,6cyclictest5960-21/usr/sbin/munin10:55:111
2294399406,6cyclictest21728-21/usr/sbin/munin08:45:201
2294399406,6cyclictest16923-21/usr/sbin/munin12:50:101
22943994027,4cyclictest22-21ksoftirqd/111:45:111
22943994027,4cyclictest22-21ksoftirqd/108:30:161
22943994026,4cyclictest22-21ksoftirqd/112:10:131
22943994026,4cyclictest22-21ksoftirqd/111:38:241
22943994026,4cyclictest22-21ksoftirqd/109:51:261
22943994026,4cyclictest22-21ksoftirqd/109:05:261
22943994026,4cyclictest22-21ksoftirqd/107:50:121
22943994025,4cyclictest22-21ksoftirqd/110:12:131
22943994023,4cyclictest22-21ksoftirqd/111:15:111
22943994023,4cyclictest22-21ksoftirqd/110:05:121
22943994023,4cyclictest22-21ksoftirqd/110:00:121
22943994022,4cyclictest22-21ksoftirqd/109:15:261
22943994021,4cyclictest22-21ksoftirqd/112:45:281
22943994010,5cyclictest3286-21runrttasks08:05:221
2294399398,6cyclictest22-21ksoftirqd/111:21:001
22943993926,4cyclictest22-21ksoftirqd/112:30:111
22943993926,4cyclictest22-21ksoftirqd/111:10:111
22943993926,4cyclictest22-21ksoftirqd/110:35:101
22943993926,4cyclictest22-21ksoftirqd/107:30:151
22943993925,4cyclictest22-21ksoftirqd/112:00:121
22943993925,4cyclictest22-21ksoftirqd/111:25:161
22943993925,4cyclictest22-21ksoftirqd/110:50:151
22943993925,4cyclictest22-21ksoftirqd/110:34:181
22943993925,4cyclictest22-21ksoftirqd/108:10:281
22943993918,4cyclictest22-21ksoftirqd/107:45:101
22943993914,6cyclictest22-21ksoftirqd/110:40:261
173072390,4sleep00-21swapper/012:50:140
2294399386,4cyclictest81rcu_preempt11:40:171
2294299371,22cyclictest6536-21sleep08:05:000
22942993615,6cyclictest30451-21python07:40:260
229012360,3sleep022906-21tail08:45:280
76652340,5sleep0111rcuc/008:05:270
22942993414,6cyclictest26458-21ntp_states07:30:250
324402331,11sleep00-21swapper/010:39:310
2294299335,4cyclictest17071-21awk08:30:260
2294299331,20cyclictest21093-21taskset10:08:490
22942993310,18cyclictest104202chrt08:15:020
2294299324,4cyclictest81rcu_preempt08:25:160
2294299323,15cyclictest0-21swapper/007:59:470
2294299322,4cyclictest81rcu_preempt08:10:280
2294299321,4cyclictest81rcu_preempt09:41:510
22942993211,7cyclictest12626-21diskstats08:20:130
22942993211,6cyclictest9661-21diskstats12:30:130
2294299321,16cyclictest14090-21wc12:40:260
22942993211,17cyclictest26606-21sort11:50:000
165272322,26sleep00-21swapper/012:47:360
2294299311,3cyclictest81rcu_preempt11:43:520
22942993112,6cyclictest332-21hddtemp_smartct12:05:180
2294299311,15cyclictest20929-21sort11:35:000
58152307,6sleep03-21ksoftirqd/009:26:240
2294299302,4cyclictest81rcu_preempt09:11:430
2294299302,14cyclictest21746-21fschecks_count10:10:150
2294299302,14cyclictest11564-21packagekitd09:50:220
2294299302,13cyclictest2695-21snmpd12:25:120
2294299301,4cyclictest81rcu_preempt12:01:420
2294299301,4cyclictest81rcu_preempt09:57:590
22942993012,6cyclictest31790-21fschecks_time07:45:170
22942993012,5cyclictest2934-21/usr/sbin/munin12:10:300
22942993011,6cyclictest6306-21memory12:20:210
280882291,5sleep00-21swapper/011:52:030
26292291,5sleep00-21swapper/007:54:380
2294299295,11cyclictest21738-21missed_timers11:35:230
2294299293,4cyclictest81rcu_preempt11:13:090
2294299292,4cyclictest81rcu_preempt10:31:470
22942992918,7cyclictest24967-21cron10:20:000
2294299291,7cyclictest81rcu_preempt08:36:320
2294299291,4cyclictest81rcu_preempt11:27:580
2294299291,4cyclictest81rcu_preempt11:05:280
22942992912,5cyclictest3031-21perl09:20:160
2294299291,15cyclictest7428-21/usr/sbin/munin09:30:290
2294299291,15cyclictest25739-21iostat10:20:180
22942992910,7cyclictest27287-21cat09:00:000
22942992910,7cyclictest2180-21aten_r4power_po10:45:120
305812281,23sleep030585-21pidof09:06:000
2294299287,4cyclictest40250irq/92-i91509:02:310
2294299282,14cyclictest11565-21gdbus10:53:160
2294299281,3cyclictest81rcu_preempt10:41:520
2294299281,19cyclictest0-21swapper/011:56:420
2294299281,14cyclictest11565-21gdbus12:18:340
22942992810,5cyclictest28375-21ntp_states07:35:250
22942992810,5cyclictest18996-21chrt10:01:280
148672281,5sleep00-21swapper/011:16:330
91452271,5sleep00-21swapper/011:00:350
283332271,5sleep00-21swapper/010:25:490
2294299273,3cyclictest81rcu_preempt11:21:290
22942992718,5cyclictest6351-21cut10:55:140
22942992710,4cyclictest0-21swapper/012:35:140
2294299270,4cyclictest81rcu_preempt09:36:180
205412271,5sleep00-21swapper/008:40:220
133912271,5sleep00-21swapper/009:46:580
22942992610,12cyclictest23766-21cpu08:50:130
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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