Date: Wed, 19 Feb 2025 20:47:36 -0600 From: "Maku Bex" <zagazaw2004@gmail.com> To: "'Mohammad Noureldin'" <mohammad@thelightbird.com>, "'Freebsd current'" <freebsd-current@freebsd.org> Subject: RE: Very poor -CURRENT boot performance on AMD Message-ID: <002301db8341$cd1ffc60$675ff520$@gmail.com> In-Reply-To: <CAAQ96DxEOHexefyiFStHUYt6rnmGsGj%2BFvZhGyXqooaGyNEteg@mail.gmail.com> References: <CAAQ96DxEOHexefyiFStHUYt6rnmGsGj%2BFvZhGyXqooaGyNEteg@mail.gmail.com>
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Hi Mohammad,
=20
The performance issue(s) have been noted on the UPDATING file. Here is a =
snippet:=20
=20
=20
NOTE TO PEOPLE WHO THINK THAT FreeBSD 15.x IS SLOW:
FreeBSD 15.x has many debugging features turned on, in both the =
kernel
and userland. These features attempt to detect incorrect use of
system primitives, and encourage loud failure through extra sanity
checking and fail stop semantics. They also substantially impact
system performance. If you want to do performance measurement,
benchmarking, and optimization, you'll want to turn them off. This
includes various WITNESS- related kernel options, INVARIANTS, =
malloc
debugging flags in userland, and various verbose features in the
kernel. Many developers choose to disable these features on build
machines to maximize performance. (To completely disable malloc
debugging, define WITH_MALLOC_PRODUCTION in /etc/src.conf and =
rebuild
world, or to merely disable the most expensive debugging =
functionality
at runtime, run "ln -s 'abort:false,junk:false' /etc/malloc.conf".)
=20
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=20
From: owner-freebsd-current@FreeBSD.org =
<owner-freebsd-current@FreeBSD.org> On Behalf Of Mohammad Noureldin
Sent: Wednesday, February 19, 2025 9:34 PM
To: Freebsd current <freebsd-current@freebsd.org>
Subject: Very poor -CURRENT boot performance on AMD
=20
Hi,
=20
I've installed -CURRENT using snapshot =
"FreeBSD-15.0-CURRENT-amd64-20250213-6156da866e7d-275409" on an HP =
EliteBook 845 G10 with AMD Ryzen 5 7540U.
=20
Both when booting from the install media and when booting from disk =
after installation I get a very poor boot performance up until the =
FreeBSD Boot Options Menu. Right after it is all OK.
=20
I've recorded what happens during the boot from the installation media =
in [1].
=20
Does this ring any bells ? Is it a bug that I should report in a PR =
(Problem Report) ?
=20
[1] =
https://drive.google.com/file/d/1s1a9qTwh-8gWOp0Lyta_Wc0RyUAkXTND/view?us=
p=3Dsharing
=20
--=20
Thanks
- Mohammad Noureldin
--
"Life is like riding a bicycle. To keep your balance you must keep =
moving"
- Albert Einstein
=20
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class=3DWordSection1><p class=3DMsoNormal><span =
style=3D'font-family:"Courier New"'>Hi Mohammad,<o:p></o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-family:"Courier =
New"'><o:p> </o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-family:"Courier New"'>The performance issue(s) have been =
noted on the UPDATING file. Here is a snippet: <o:p></o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-family:"Courier =
New"'><o:p> </o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-family:"Courier New"'><o:p> </o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-family:"Courier New"'>NOTE TO =
PEOPLE WHO THINK THAT FreeBSD 15.x IS SLOW:<o:p></o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-family:"Courier =
New"'>=C2=A0=C2=A0=C2=A0=C2=A0 FreeBSD 15.x has many debugging features =
turned on, in both the kernel<o:p></o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-family:"Courier =
New"'>=C2=A0=C2=A0=C2=A0=C2=A0 and userland.=C2=A0 These features =
attempt to detect incorrect use of<o:p></o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-family:"Courier =
New"'>=C2=A0=C2=A0=C2=A0=C2=A0 system primitives, and encourage loud =
failure through extra sanity<o:p></o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-family:"Courier =
New"'>=C2=A0=C2=A0=C2=A0=C2=A0 checking and fail stop semantics.=C2=A0 =
They also substantially impact<o:p></o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-family:"Courier =
New"'>=C2=A0=C2=A0=C2=A0=C2=A0 system performance.=C2=A0 If you want to =
do performance measurement,<o:p></o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-family:"Courier =
New"'>=C2=A0=C2=A0=C2=A0=C2=A0 benchmarking, and optimization, you'll =
want to turn them off.=C2=A0 This<o:p></o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-family:"Courier =
New"'>=C2=A0=C2=A0=C2=A0=C2=A0 includes various WITNESS- related kernel =
options, INVARIANTS, malloc<o:p></o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-family:"Courier =
New"'>=C2=A0=C2=A0=C2=A0=C2=A0 debugging flags in userland, and various =
verbose features in the<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-family:"Courier New"'>=C2=A0=C2=A0=C2=A0=C2=A0 =
kernel.=C2=A0 Many developers choose to disable these features on =
build<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-family:"Courier New"'>=C2=A0=C2=A0=C2=A0=C2=A0 machines to =
maximize performance.=C2=A0 (To completely disable =
malloc<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-family:"Courier New"'>=C2=A0=C2=A0=C2=A0=C2=A0 debugging, =
define WITH_MALLOC_PRODUCTION in /etc/src.conf and =
rebuild<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-family:"Courier New"'>=C2=A0=C2=A0=C2=A0=C2=A0 world, or =
to merely disable the most expensive debugging =
functionality<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-family:"Courier New"'>=C2=A0=C2=A0=C2=A0=C2=A0 at runtime, =
run "ln -s 'abort:false,junk:false' =
/etc/malloc.conf".)<o:p></o:p></span></p><p class=3DMsoNormal><span =
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style=3D'font-family:"Courier New"'><o:p> </o:p></span></p><div =
style=3D'border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in'><p class=3DMsoNormal><b>From:</b> =
owner-freebsd-current@FreeBSD.org =
<owner-freebsd-current@FreeBSD.org> <b>On Behalf Of </b>Mohammad =
Noureldin<br><b>Sent:</b> Wednesday, February 19, 2025 9:34 =
PM<br><b>To:</b> Freebsd current =
<freebsd-current@freebsd.org><br><b>Subject:</b> Very poor =
-CURRENT boot performance on AMD<o:p></o:p></p></div><p =
class=3DMsoNormal><o:p> </o:p></p><div><div><p =
class=3DMsoNormal>Hi,<o:p></o:p></p></div><div><p =
class=3DMsoNormal><o:p> </o:p></p></div><div><p =
class=3DMsoNormal>I've installed -CURRENT using snapshot =
"FreeBSD-15.0-CURRENT-amd64-20250213-6156da866e7d-275409" on =
an HP EliteBook 845 G10 with AMD Ryzen 5 =
7540U.<o:p></o:p></p></div><div><p =
class=3DMsoNormal><o:p> </o:p></p></div><div><p =
class=3DMsoNormal>Both when booting from the install media and when =
booting from disk after installation I get a very poor boot performance =
up until the FreeBSD Boot Options Menu. Right after it is all =
OK.<o:p></o:p></p></div><div><p =
class=3DMsoNormal><o:p> </o:p></p></div><div><p =
class=3DMsoNormal>I've recorded what happens during the boot from the =
installation media in [1].<o:p></o:p></p></div><div><p =
class=3DMsoNormal><o:p> </o:p></p></div><div><p =
class=3DMsoNormal>Does this ring any bells ? Is it a bug that I should =
report in a PR (Problem Report) ?<o:p></o:p></p></div><div><p =
class=3DMsoNormal><o:p> </o:p></p></div><div><p =
class=3DMsoNormal>[1] <a =
href=3D"https://drive.google.com/file/d/1s1a9qTwh-8gWOp0Lyta_Wc0RyUAkXTND=
/view?usp=3Dsharing">https://drive.google.com/file/d/1s1a9qTwh-8gWOp0Lyta=
_Wc0RyUAkXTND/view?usp=3Dsharing</a><o:p></o:p></p></div><div><p =
class=3DMsoNormal><o:p> </o:p></p></div><p class=3DMsoNormal><span =
class=3Dgmailsignatureprefix>-- =
</span><o:p></o:p></p><div><div><div><div><p class=3DMsoNormal><span =
style=3D'color:#888888'>Thanks<br>- Mohammad =
Noureldin<br>--<br>"Life is like riding a bicycle. To keep your =
balance you must keep moving"<br>- Albert =
Einstein<o:p></o:p></span></p></div></div><div><p =
class=3DMsoNormal><span =
style=3D'color:#888888'><o:p> </o:p></span></p></div></div></div></d=
iv></div></body></html>
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