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2023-01-30 - 05:17

x86 Intel Atom D2700 @2130 MHz, Linux 5.15.49-rt47 (Profile)

Latency plot of system in rack #1, slot #6
Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
Command line: cyclictest -l100000000 -m -Sp99 -i200 -h400 -q
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 50 highest latencies:
System rack1slot6.osadl.org (updated Mon Jan 30, 2023 00:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2911380,0irq_work/2311rcuc/220:37:432
2911240,0irq_work/2311rcuc/221:58:112
2911230,0irq_work/2311rcuc/200:28:032
2911200,0irq_work/2311rcuc/200:23:062
2911200,0irq_work/2311rcuc/200:23:062
2911150,0irq_work/2311rcuc/219:58:092
2911100,0irq_work/2311rcuc/221:28:122
2911100,0irq_work/2311rcuc/221:17:432
2911080,0irq_work/2311rcuc/222:48:182
2911080,0irq_work/2311rcuc/222:03:122
2911060,0irq_work/2311rcuc/220:43:132
2911060,0irq_work/2311rcuc/220:28:142
2911060,0irq_work/2311rcuc/219:08:042
2911050,0irq_work/2311rcuc/223:57:592
2911050,0irq_work/2311rcuc/220:53:162
2911050,0irq_work/2311rcuc/220:26:072
2911030,0irq_work/2311rcuc/223:13:142
2911010,0irq_work/2311rcuc/223:18:192
2911010,0irq_work/2311rcuc/223:18:192
2911000,0irq_work/2311rcuc/223:50:112
2911000,0irq_work/2311rcuc/222:58:152
2911000,0irq_work/2311rcuc/219:23:072
291990,0irq_work/2311rcuc/219:18:072
291980,0irq_work/2311rcuc/222:37:442
291980,0irq_work/2311rcuc/200:12:392
291970,0irq_work/2311rcuc/222:18:172
291960,0irq_work/2311rcuc/219:16:462
291940,0irq_work/2311rcuc/220:08:002
291940,0irq_work/2311rcuc/219:07:432
291930,0irq_work/2311rcuc/221:46:222
291930,0irq_work/2311rcuc/221:02:422
291930,0irq_work/2311rcuc/221:02:422
291930,0irq_work/2311rcuc/219:30:112
291920,0irq_work/2311rcuc/223:43:172
291920,0irq_work/2311rcuc/221:54:252
291910,0irq_work/2311rcuc/223:23:102
291910,0irq_work/2311rcuc/223:11:012
291910,0irq_work/2311rcuc/221:36:422
291910,0irq_work/2311rcuc/221:13:022
291900,0irq_work/2311rcuc/221:39:092
291900,0irq_work/2311rcuc/200:14:182
291880,0irq_work/2311rcuc/221:08:052
291880,0irq_work/2311rcuc/220:22:422
291880,0irq_work/2311rcuc/220:13:072
291880,0irq_work/2311rcuc/200:03:222
291870,0irq_work/2311rcuc/221:23:212
291870,0irq_work/2311rcuc/200:20:452
291860,0irq_work/2311rcuc/223:53:232
291850,0irq_work/2311rcuc/222:13:062
361840,0irq_work/3381rcuc/319:33:013
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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