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2026-07-14 - 11:03

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #4, slot #1

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.

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 100 highest latencies:
System rack4slot1s.osadl.org (updated Tue Jul 14, 2026 00:44:21)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1970921030,2chrt19706-21sensors_temp22:28:420
1970921030,2chrt19706-21sensors_temp22:28:420
160922950,3sleep10-21swapper/119:28:261
160922950,3sleep10-21swapper/119:28:261
160922950,3sleep10-21swapper/119:28:261
227072940,3chrt0-21swapper/219:43:422
227072940,3chrt0-21swapper/219:43:422
115052940,3sleep111508-21fschecks_time22:08:331
232652910,2chrt21747-40mandb00:04:231
232652910,2chrt21747-40mandb00:04:231
42502880,2sleep10-21swapper/121:48:351
42502880,2sleep10-21swapper/121:48:351
42502880,2sleep10-21swapper/121:48:351
10981996354,4cyclictest0-21swapper/000:03:350
10981996354,4cyclictest0-21swapper/000:03:350
110542590,1sleep10-21swapper/123:33:351
110542590,1sleep10-21swapper/123:33:351
166732530,4sleep20-21swapper/219:28:352
166732530,4sleep20-21swapper/219:28:352
166732530,4sleep20-21swapper/219:28:352
163022510,2sleep110980-21cyclictest23:48:311
163022510,2sleep110980-21cyclictest23:48:311
163022510,2sleep110980-21cyclictest23:48:311
229352500,3chrt0-21swapper/321:13:243
229352500,3chrt0-21swapper/321:13:243
229352500,3chrt0-21swapper/321:13:243
229352500,3chrt0-21swapper/321:13:243
297422480,2chrt29743-21awk20:03:351
297422480,2chrt29743-21awk20:03:351
255322460,1sleep10-21swapper/122:43:431
255322460,1sleep10-21swapper/122:43:431
255322460,1sleep10-21swapper/122:43:431
20412460,3chrt0-21swapper/123:08:391
20412460,3chrt0-21swapper/123:08:391
20412460,3chrt0-21swapper/123:08:391
226892440,3sleep10-21swapper/122:38:321
226892440,3sleep10-21swapper/122:38:321
1098299444,37cyclictest21832-21latency_hist00:03:261
1098299444,37cyclictest21832-21latency_hist00:03:261
1098299444,37cyclictest21832-21latency_hist00:03:261
45902410,3sleep20-21swapper/221:48:402
45902410,3sleep20-21swapper/221:48:402
45902410,3sleep20-21swapper/221:48:402
168532400,2sleep00-21swapper/019:28:380
168532400,2sleep00-21swapper/019:28:380
168532400,2sleep00-21swapper/019:28:380
10982994013,4cyclictest0-21swapper/120:48:401
10982994013,4cyclictest0-21swapper/120:48:401
298462390,2chrt0-21swapper/220:03:362
298462390,2chrt0-21swapper/220:03:362
242912390,2sleep10-21swapper/121:13:421
242912390,2sleep10-21swapper/121:13:421
242912390,2sleep10-21swapper/121:13:421
10982993918,19cyclictest0-21swapper/121:28:421
10982993918,19cyclictest0-21swapper/121:28:421
38012380,11sleep1271rcuc/100:38:441
38012380,11sleep1271rcuc/100:38:441
301372380,1sleep30-21swapper/320:03:413
301372380,1sleep30-21swapper/320:03:413
10982993818,18cyclictest31259-21ntp_kernel_err21:33:371
10982993818,18cyclictest31259-21ntp_kernel_err21:33:371
10982993815,21cyclictest0-21swapper/120:21:391
10982993815,21cyclictest0-21swapper/120:21:391
10982993815,20cyclictest0-21swapper/121:13:311
10982993815,20cyclictest0-21swapper/121:13:311
10982993815,20cyclictest0-21swapper/121:13:311
1098299371,13cyclictest6178-21unixbench-2d23:18:431
1098299371,13cyclictest6178-21unixbench-2d23:18:431
1098299371,12cyclictest17055-21ntp_kernel_pll_23:48:391
1098299371,12cyclictest17055-21ntp_kernel_pll_23:48:391
10981993727,8cyclictest26589-21sendmail21:23:200
10981993727,8cyclictest26589-21sendmail21:23:200
10981993727,8cyclictest26589-21sendmail21:23:200
1098299363,11cyclictest29956-21/usr/sbin/munin22:58:371
1098299363,11cyclictest29956-21/usr/sbin/munin22:58:371
10982993615,19cyclictest0-21swapper/122:53:421
10982993615,19cyclictest0-21swapper/122:53:421
1098299361,12cyclictest31625-21sed00:28:351
1098299361,12cyclictest31625-21sed00:28:351
1098299361,10cyclictest12904-21cron22:13:201
1098299361,10cyclictest12904-21cron22:13:201
1098299359,3cyclictest0-21swapper/121:03:431
1098299359,3cyclictest0-21swapper/121:03:431
1098299359,3cyclictest0-21swapper/121:03:431
1098299352,11cyclictest13896-21ntp_offset22:13:391
1098299352,11cyclictest13896-21ntp_offset22:13:391
1098299352,11cyclictest13896-21ntp_offset22:13:391
1098299351,14cyclictest26057-21taskset00:13:341
1098299351,14cyclictest26057-21taskset00:13:341
10982993511,3cyclictest0-21swapper/120:59:391
10982993511,3cyclictest0-21swapper/120:59:391
1098299351,12cyclictest31826-21netstat20:08:391
1098299351,12cyclictest31826-21netstat20:08:391
1098299351,12cyclictest22909-21timerwakeupswit19:43:441
1098299351,12cyclictest22909-21timerwakeupswit19:43:441
1098299351,11cyclictest749-21runrttasks19:53:101
1098299351,11cyclictest749-21runrttasks19:53:101
10981993528,5cyclictest28464-21latency_hist21:28:330
10981993528,5cyclictest28464-21latency_hist21:28:330
10981993526,7cyclictest2092-21fschecks_time21:43:330
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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