[Bug 256217] [tcp] High system load because of interrupts with RACK

From: <bugzilla-noreply_at_freebsd.org>
Date: Fri, 28 May 2021 12:55:59 +0000
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=256217

--- Comment #1 from Christos Chatzaras <chris_at_cretaforce.gr> ---
With both LAPIC and HPET there are many interrups.

----

CPU 0: 39.0% user,  0.0% nice,  6.7% system, 47.2% interrupt,  7.1% idle
CPU 1: 40.6% user,  0.0% nice,  3.5% system, 46.1% interrupt,  9.8% idle
CPU 2: 44.5% user,  0.0% nice,  5.5% system, 43.7% interrupt,  6.3% idle
CPU 3: 42.5% user,  0.0% nice,  6.7% system, 42.9% interrupt,  7.9% idle
CPU 4: 38.2% user,  0.0% nice,  5.5% system, 48.4% interrupt,  7.9% idle
CPU 5: 40.2% user,  0.0% nice,  5.1% system, 47.2% interrupt,  7.5% idle
CPU 6: 42.5% user,  0.0% nice,  5.9% system, 44.1% interrupt,  7.5% idle
CPU 7: 44.5% user,  0.0% nice,  6.7% system, 44.5% interrupt,  4.3% idle


----

sysctl kern.eventtimer.timer=LAPIC

cpu0:timer                          3814       3810
cpu1:timer                          3868       3864
cpu2:timer                          3947       3943
cpu3:timer                          3916       3912
cpu4:timer                          3780       3776
cpu5:timer                          3917       3913
cpu6:timer                          3860       3856
cpu7:timer                          3814       3810

----

sysctl kern.eventtimer.timer=HPET

irq120: hpet0:t0                    3047       3047
irq121: hpet0:t1                    3053       3053
irq122: hpet0:t2                    3146       3146
irq123: hpet0:t3                    3099       3099
irq124: hpet0:t4                    2942       2942
irq125: hpet0:t5                    3120       3120
irq126: hpet0:t6                    3037       3037
irq127: hpet0:t7                    3049       3049
irq129: ahci0                        101        101
irq130: em0:irq0                     401        401

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Received on Fri May 28 2021 - 12:55:59 UTC

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