Date: Sun, 20 Mar 2022 20:45:30 +0000 From: Rick Macklem <rmacklem@uoguelph.ca> To: mike tancsa <mike@sentex.net>, Yoshihiro Ota <ota@j.email.ne.jp> Cc: 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: <YT2PR01MB9730287F7C97ED81BA270DB5DD159@YT2PR01MB9730.CANPRD01.PROD.OUTLOOK.COM> In-Reply-To: <9aee6d0f-e1c9-8c98-7352-7a0ff3e3d147@sentex.net> 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>
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mike tancsa <mike@sentex.net> wrote:=0A=
> On 3/20/2022 7:43 AM, mike tancsa wrote:=0A=
>> On 3/18/2022 9:18 PM, Yoshihiro Ota wrote:=0A=
>>> I had built several versions between releng/13.0 branch point to=0A=
>>> stable/13 (before releng/13.1 was created) and all of them had such=0A=
>> performance degrade.=0A=
>>>=0A=
>>> I started suspecting stable debug options and thus built releng/13.1=0A=
>>> and tested.=0A=
>>> I don't see NFS slowdown unlike stable/13.=0A=
>>> releng/13.0 and releng/12.2 were also fine.=0A=
>>=0A=
>> Hi,=0A=
>>=0A=
>> I would think there is very little difference (if any) between=0A=
>> releng/13.1 and stable/13 right now. Are you sure stable/13 suffers=0A=
>> from this issue you are seeing ?=0A=
The sources may be almost the same, but the build is not.=0A=
See /usr/src/sys/conf/std.nodebug.=0A=
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I'm assuming his releng/13.1 build created a non-debug kernel.=0A=
Debug kernels do spit out "expect reduced performance" if i recall=0A=
correctly. It sounds like he found an example of this.=0A=
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rick=0A=
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These look to be the only files touched below.=0A=
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0{cage}% git diff remotes/origin/releng/13.1..remotes/origin/stable/13 |=0A=
grep '^\-\-'=0A=
--- a/contrib/tzcode/stdtime/ctime.3=0A=
--- a/lib/libc/gen/time.3=0A=
--- a/lib/libcasper/services/cap_net/cap_net.c=0A=
--- a/lib/libpfctl/libpfctl.c=0A=
--- a/lib/libpfctl/libpfctl.h=0A=
--- a/libexec/rc/rc.d/dumpon=0A=
--- a/release/pkg_repos/release-dvd.conf=0A=
--- a/sbin/devd/devd.conf=0A=
--- a/sbin/ipf/common/ipf.h=0A=
--- a/sbin/ipf/libipf/printactivenat.c=0A=
--- a/sbin/ipf/libipf/printstate.c=0A=
--- a/sbin/pfctl/pfctl.c=0A=
--- a/sbin/pfctl/pfctl_optimize.c=0A=
--- a/share/man/man4/Makefile=0A=
--- a/share/man/man4/netmap.4=0A=
--- /dev/null=0A=
--- a/share/man/man4/vale.4=0A=
--- a/share/man/man9/crypto_buffer.9=0A=
--- a/stand/efi/libefi/efi_console.c=0A=
--- a/stand/i386/libi386/vidconsole.c=0A=
--- a/sys/arm64/include/pcpu.h=0A=
--- a/sys/cddl/contrib/opensolaris/uts/common/dtrace/fasttrap.c=0A=
--- a/sys/cddl/contrib/opensolaris/uts/intel/dtrace/fasttrap_isa.c=0A=
--- a/sys/conf/newvers.sh=0A=
--- a/sys/crypto/armv8/armv8_crypto.c=0A=
--- a/sys/crypto/armv8/armv8_crypto.h=0A=
--- a/sys/crypto/armv8/armv8_crypto_wrap.c=0A=
--- a/sys/dev/netmap/netmap.c=0A=
--- a/sys/dev/netmap/netmap_bdg.c=0A=
--- a/sys/dev/netmap/netmap_kern.h=0A=
--- a/sys/dev/netmap/netmap_vale.c=0A=
--- a/sys/i386/i386/machdep.c=0A=
--- a/sys/kern/kern_rmlock.c=0A=
--- a/sys/kern/sys_process.c=0A=
--- a/sys/kern/vfs_cache.c=0A=
--- a/sys/kern/vfs_subr.c=0A=
--- a/sys/modules/if_epair/Makefile=0A=
--- a/sys/modules/linuxkpi/Makefile=0A=
--- a/sys/net/if_epair.c=0A=
--- a/sys/opencrypto/cryptodev.h=0A=
--- a/sys/riscv/include/cpufunc.h=0A=
--- a/sys/riscv/include/pmap.h=0A=
--- a/sys/riscv/include/pte.h=0A=
--- a/sys/riscv/include/riscvreg.h=0A=
--- a/sys/riscv/include/vmparam.h=0A=
--- a/sys/riscv/riscv/elf_machdep.c=0A=
--- a/sys/riscv/riscv/locore.S=0A=
--- a/sys/riscv/riscv/pmap.c=0A=
--- a/sys/sys/param.h=0A=
--- a/sys/x86/x86/mp_x86.c=0A=
--- a/usr.bin/diff/pr.c=0A=
--- a/usr.bin/touch/touch.c=0A=
0{cage}%=0A=
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