Re: [Bsdrp-users] high WCPU in clean bsdrp

[Olivier Cochard-L. <ol...@co...>]

On Fri, Feb 19, 2021 at 7:01 AM Сучасні Системи Безпеки <gri...@gm...>
wrote:

> i continue digging in this
>
> i turned on C states in bios (the was OFF)
>
> now the pmcstat shows:
>
> %SAMP IMAGE      FUNCTION                       CALLERS
>  41.9 kernel     acpi_cpu_idle_mwait            acpi_cpu_idle
>  38.6 kernel     lock_delay                     _mtx_lock_spin_cookie
>
> the acpi_cpu_idle wen from 70 to 40% but ther is a new process -
> lock_delay %(
>
> i trying to run lockstat -x aggsize=4m sleep 10 > lock-type.txt
> but it's not starting
>
> lockstat: failed to compile program: "/usr/lib/dtrace/ip.d", line 125:
> failed to copy type of 'ipv6_hdr': Conflicting type is already defined
>
> what's wrong with by HP gen8 ?
>
>
A high Lock_delay should indicate some lock contention.
Could you read the last chapter here "Lock contention source", about
lockstat usage:

https://bsdrp.net/documentation/technical_docs/performance#where_is_the_bottleneck

Regards,
Olivier