RE: Very poor -CURRENT boot performance on AMD

Hi Mohammad,

 

The performance issue(s) have been noted on the UPDATING file. Here is a snippet: 

 

 

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".)

 

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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

 

Hi,

 

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.

 

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.

 

I've recorded what happens during the boot from the installation media in [1].

 

Does this ring any bells ? Is it a bug that I should report in a PR (Problem Report) ?

 

[1] https://drive.google.com/file/d/1s1a9qTwh-8gWOp0Lyta_Wc0RyUAkXTND/view?usp=sharing

 

-- 

Thanks
- Mohammad Noureldin
--
"Life is like riding a bicycle. To keep your balance you must keep moving"
- Albert Einstein