Date: Mon, 21 Apr 2014 12:18:48 -0400 From: Mark Johnston <markj@freebsd.org> To: carlos antonio neira bustos <cneirabustos@gmail.com> Cc: "freebsd-dtrace@freebsd.org" <freebsd-dtrace@freebsd.org> Subject: Re: vminfo provider Message-ID: <CAMw1wOzK5XfBB5HYBPejFo7Ph%2BTjVN30oVpWdpHR7sqqMtLJvQ@mail.gmail.com> In-Reply-To: <CACiB22iWowtt-rn22BPaPTHvc8ZKx9qyUhP2rM77FgkfHJdPdQ@mail.gmail.com> References: <CACiB22iWowtt-rn22BPaPTHvc8ZKx9qyUhP2rM77FgkfHJdPdQ@mail.gmail.com>
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On Thu, Apr 17, 2014 at 11:03 PM, carlos antonio neira bustos
<cneirabustos@gmail.com> wrote:
> Hi All,
>
> If the vminfo provider is not available, could I get the same
> functionality from the vm_* probes?
>
> I mean, for example this one liner in Solaris:
>
> dtrace -n pgin'{@[execname] = count()}'
>
>
> Is the same as doing this in FreeBSD ?
>
>
> dtrace -n vm_page_insert:entry'{ @[execname] = count();}'
>
No, vm_page_insert doesn't correspond to a pagein. vm_page_insert is
just used to add a page to a vm object, which is a higher-level
operation. The vm object will determine what happens when an access of
one of its pages causes a fault. It could result in a pagein from swap
or a backing file, or it could just result in the allocation of a
zero-filled page.
>
>
>
> Bests
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