Date: Wed, 23 Mar 2022 00:10:02 -0400 From: Yoshihiro Ota <ota@j.email.ne.jp> To: Rick Macklem <rmacklem@uoguelph.ca> Cc: mike tancsa <mike@sentex.net>, freebsd-stable <freebsd-stable@freebsd.org> Subject: Re: nfsd becomes slow when machine CPU usage is at or over 100% on STABLE/13 Message-ID: <20220323001002.35f7a7d660654757178f0518@j.email.ne.jp> In-Reply-To: <YT2PR01MB9730287F7C97ED81BA270DB5DD159@YT2PR01MB9730.CANPRD01.PROD.OUTLOOK.COM> References: <20220309034601.ea3135e31aec3ffb2623f145@j.email.ne.jp> <YT2PR01MB9730D7B51D325258AAA29828DD0A9@YT2PR01MB9730.CANPRD01.PROD.OUTLOOK.COM> <20220318211850.67b77d43b3a02043c3819bf3@j.email.ne.jp> <9b2935cd-5f70-d2a2-a328-004fa3e7b3f8@sentex.net> <9aee6d0f-e1c9-8c98-7352-7a0ff3e3d147@sentex.net> <YT2PR01MB9730287F7C97ED81BA270DB5DD159@YT2PR01MB9730.CANPRD01.PROD.OUTLOOK.COM>
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I've been building default kernel, that is GENERIC for releng and stable branches.
I see GENERIC-NODEBUG on head but don't seem to find it on releng/ nor stable/
I grepped /usr/src/* for std.nodebug but don't seem have a match...
I wonder how nodebug kicks in releng.
I added "enable DDB" to i386 kernel but didn't touch amd64 kernel.
Both amd64 and i386 looks okay with releng/13.1.
Hiro
On Sun, 20 Mar 2022 20:45:30 +0000
Rick Macklem <rmacklem@uoguelph.ca> wrote:
> mike tancsa <mike@sentex.net> wrote:
> > On 3/20/2022 7:43 AM, mike tancsa wrote:
> >> On 3/18/2022 9:18 PM, Yoshihiro Ota wrote:
> >>> I had built several versions between releng/13.0 branch point to
> >>> stable/13 (before releng/13.1 was created) and all of them had such
> >> performance degrade.
> >>>
> >>> I started suspecting stable debug options and thus built releng/13.1
> >>> and tested.
> >>> I don't see NFS slowdown unlike stable/13.
> >>> releng/13.0 and releng/12.2 were also fine.
> >>
> >> Hi,
> >>
> >> I would think there is very little difference (if any) between
> >> releng/13.1 and stable/13 right now. Are you sure stable/13 suffers
> >> from this issue you are seeing ?
> The sources may be almost the same, but the build is not.
> See /usr/src/sys/conf/std.nodebug.
>
> I'm assuming his releng/13.1 build created a non-debug kernel.
> Debug kernels do spit out "expect reduced performance" if i recall
> correctly. It sounds like he found an example of this.
>
> rick
>
> >
> >
> These look to be the only files touched below.
>
> 0{cage}% git diff remotes/origin/releng/13.1..remotes/origin/stable/13 |
> grep '^\-\-'
> --- a/contrib/tzcode/stdtime/ctime.3
> --- a/lib/libc/gen/time.3
> --- a/lib/libcasper/services/cap_net/cap_net.c
> --- a/lib/libpfctl/libpfctl.c
> --- a/lib/libpfctl/libpfctl.h
> --- a/libexec/rc/rc.d/dumpon
> --- a/release/pkg_repos/release-dvd.conf
> --- a/sbin/devd/devd.conf
> --- a/sbin/ipf/common/ipf.h
> --- a/sbin/ipf/libipf/printactivenat.c
> --- a/sbin/ipf/libipf/printstate.c
> --- a/sbin/pfctl/pfctl.c
> --- a/sbin/pfctl/pfctl_optimize.c
> --- a/share/man/man4/Makefile
> --- a/share/man/man4/netmap.4
> --- /dev/null
> --- a/share/man/man4/vale.4
> --- a/share/man/man9/crypto_buffer.9
> --- a/stand/efi/libefi/efi_console.c
> --- a/stand/i386/libi386/vidconsole.c
> --- a/sys/arm64/include/pcpu.h
> --- a/sys/cddl/contrib/opensolaris/uts/common/dtrace/fasttrap.c
> --- a/sys/cddl/contrib/opensolaris/uts/intel/dtrace/fasttrap_isa.c
> --- a/sys/conf/newvers.sh
> --- a/sys/crypto/armv8/armv8_crypto.c
> --- a/sys/crypto/armv8/armv8_crypto.h
> --- a/sys/crypto/armv8/armv8_crypto_wrap.c
> --- a/sys/dev/netmap/netmap.c
> --- a/sys/dev/netmap/netmap_bdg.c
> --- a/sys/dev/netmap/netmap_kern.h
> --- a/sys/dev/netmap/netmap_vale.c
> --- a/sys/i386/i386/machdep.c
> --- a/sys/kern/kern_rmlock.c
> --- a/sys/kern/sys_process.c
> --- a/sys/kern/vfs_cache.c
> --- a/sys/kern/vfs_subr.c
> --- a/sys/modules/if_epair/Makefile
> --- a/sys/modules/linuxkpi/Makefile
> --- a/sys/net/if_epair.c
> --- a/sys/opencrypto/cryptodev.h
> --- a/sys/riscv/include/cpufunc.h
> --- a/sys/riscv/include/pmap.h
> --- a/sys/riscv/include/pte.h
> --- a/sys/riscv/include/riscvreg.h
> --- a/sys/riscv/include/vmparam.h
> --- a/sys/riscv/riscv/elf_machdep.c
> --- a/sys/riscv/riscv/locore.S
> --- a/sys/riscv/riscv/pmap.c
> --- a/sys/sys/param.h
> --- a/sys/x86/x86/mp_x86.c
> --- a/usr.bin/diff/pr.c
> --- a/usr.bin/touch/touch.c
> 0{cage}%
>
>
>
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