Re: PHP performance on Xen domU with mulitple vcpu

[Emmanuel Dreyfus <manu%netbsd.org@localhost>]

On Sun, May 18, 2025 at 12:29:51PM +0000, Taylor R Campbell wrote:
> Remind me -- are you running with or without the xenclock.patch I
> posted on 2025-04-05?  I recall there was some trouble with dtrace at
> the time I posted it.

With and without xenclock.patch, same issue.
> 
> And, if you built a kernel with options KDTRACE_HOOKS, can you share
> any output from the following dtrace script?  (Will only print output
> when something bad happens.)

I built with KDTRACE_HOOKS, but dtrace still does not work. It fails
to load the dtrace module. Console says:
[ 8928.7630011] kobj_checksyms, 1013: [dtrace]: linker error: symbol `dtrace_smap_enable' not found
[ 8928.7630011] kobj_checksyms, 1013: [dtrace]: linker error: symbol `dtrace_smap_disable' not found
[ 8928.7630011] WARNING: module error: Unable to affix module `dtrace', error 8

Perhaps we could just try a bunch of printfs?

-- 
Emmanuel Dreyfus
manu%netbsd.org@localhost