Painfully slow compilation (read: "make buildworld buildkernel") on not-so-weak system

Lev Serebryakov lev at
Sat Dec 8 13:45:03 UTC 2018

Hello Eugene,

Saturday, December 8, 2018, 4:27:13 PM, you wrote:

>>  I'm completely lost. Is it problem of software? Hardware? If it is
>> hardware problem what should I blame?

> Try using different kern.timecounter.hardware and/or kern.eventtimer.timer
> but first try kern.eventtimer.periodic=1 instead of default 0.
 Nothing helps. I've tried periodic=1 and replace hardware and time with HPT
 (from TSC-Low and LAPIC), but system still "sticky" with single-job build
 and unresposnive with multiple-job build, and still there is strange bursts
 of CPU consumption from threads and processes which should be low-profile.

> If something of this helps, try going back to defaults and then disable power-saving settings, if any.
 I'll try to disable C2/C3 and turn off Turbo as next step...

Best regards,
 Lev                            mailto:lev at

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