Date: Fri, 07 Dec 2007 17:14:53 +0100 From: Uwe Doering <gemini@geminix.org> To: Stephen.Clark@seclark.us Cc: freebsd-stable@freebsd.org Subject: Re: 4.x Collecting pv entries Suggest increasing PMAP_SHPGPERPROC, Message-ID: <4759717D.2090409@geminix.org> In-Reply-To: <47596CD2.4080502@seclark.us> References: <47594087.7030703@seclark.us> <b41c75520712070453w11181b7am9d95a215d15ad091@mail.gmail.com> <475952EF.70400@seclark.us> <47596B11.90601@geminix.org> <47596CD2.4080502@seclark.us>
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Hi Steve,
Stephen Clark wrote:
> Uwe Doering wrote:
>> [...]
>> But you can put that option into the kernel config file:
>>
>> options PMAP_SHPGPERPROC=...
>>
>> and build a new kernel with it.
>
> You are correct. My question is more how much should I increase it. The
> current default in the 4.x LINT file
> is "options PMAP_SHPGPERPROC=201" should I double it? Increase it by 50
> to 251? Should it be a prime number?
> I am just asking for information.
The settings in the LINT file are not necessarily the defaults, rather
mere examples. The default value for PMAP_SHPGPERPROC is 200 (defined
in the source file /usr/src/sys/i386/i386/pmap.c). I would recommend to
increase it by 100 until the messages stop. We use 300 on our servers,
for instance.
Regards,
Uwe
--
Uwe Doering | EscapeBox - Managed On-Demand UNIX Servers
gemini@geminix.org | http://www.escapebox.net
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