Date: Sat, 08 Dec 2018 12:48:38 +0000 From: Waitman Gobble <waitman@waitman.net> To: "lev@FreeBSD.org" <lev@FreeBSD.org> Cc: "freebsd-hackers@freebsd.org" <freebsd-hackers@freebsd.org>, "freebsd-current@freebsd.org" <freebsd-current@freebsd.org> Subject: Re: Painfully slow compilation (read: "make buildworld buildkernel") on not-so-weak system Message-ID: <rL4Oaa7Xbty9FxxEgQrfz-YRJ-fD_H7arqAmqxsb7atNtWAQRe0F7ntwLhzmSRNl29YgLuCZNHHAqNUKtjAI5CQmofhlzLPgUvm34cset9s=@waitman.net> In-Reply-To: <135752149.20181208151859@serebryakov.spb.ru> References: <902729965.20181208141303@serebryakov.spb.ru> <135752149.20181208151859@serebryakov.spb.ru>
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=E2=80=90=E2=80=90=E2=80=90=E2=80=90=E2=80=90=E2=80=90=E2=80=90 Original Me=
ssage =E2=80=90=E2=80=90=E2=80=90=E2=80=90=E2=80=90=E2=80=90=E2=80=90
On Saturday, December 8, 2018 8:18 AM, Lev Serebryakov <lev@FreeBSD.org> wr=
ote:
> Hello Lev,
>
> Saturday, December 8, 2018, 2:13:03 PM, you wrote:
>
> > Another strange thing I noticed: when system is in such state, "top -SH=
"
> > shows that sometimes very low-profile processes, like clock software
> > interrupt (!) could consume large amount of CPU for short periods time.=
When
> > system is idle there never will be "intr{swi4: clock (0)}" consuming 55=
% CPU
> > for one "frame" or sshd, or screen itself.
>
> Like this. This system doesn't have any significant network traffic now =
=E2=80=94
> only one ssh connection, which is used as console. And 62.3% for network
> card. WTF?!
>
> PID USERNAME PRI NICE SIZE RES STATE C TIME WCPU COMMAND
> 20128 root 101 0 104M 74M CPU1 1 0:31 100.00% cc
> 0 root -76 - 0 4608K - 2 53:25 62.23% kernel{if_config_tqg_0}
> 11 root -60 - 0 240K WAIT 0 25:45 24.89% intr{swi4: clock (0)}
> 9 root -8 - 0 160K tx->tx 0 7:38 24.88% zfskern{txg_thread_enter}
>
> 995 root 24 0 17M 7676K select 1 2:20 12.44% sendmail
> 13791 root 24 0 24M 15M select 0 0:04 12.44% make
>
>
> -------------------------------------------------------------------------=
--------------------------------
>
> Best regards,
> Lev mailto:lev@FreeBSD.org
>
> freebsd-hackers@freebsd.org mailing list
> https://lists.freebsd.org/mailman/listinfo/freebsd-hackers
> To unsubscribe, send any mail to "freebsd-hackers-unsubscribe@freebsd.org=
"
I had super slow build for r341270, but I thought it was because I accident=
ally left WITNESS option set.
I killed it after about 10 hours, booted to single user and rebuilt kernel =
there.
Waitman
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