Re: Determining disk activity per volume
Re: Determining disk activity per volume
- Subject: Re: Determining disk activity per volume
- From: Rick Mann <email@hidden>
- Date: Fri, 6 Oct 2006 18:37:54 -0700
On Oct 6, 2006, at 16:14 , Thulli wrote:
Option 1. If you are interested only in read and write system calls
and don't want to do polling, take a look at this.
http://developer.apple.com/technotes/tn2005/tn2127.html. You need
to write a kauth hook and user land client process. If the kauth
hook kext could provide a device interface, then the user land
client can block on a "read(/dev/yourKauthDevice)" and process what
you read with no polling.
Oooh! This might work very well.
Option 2. If you don't want to write a kext and still achieve
results with NO polling, then take a look at this
http://developer.apple.com/documentation/Performance/Conceptual/
FileSystem/Articles/TrackingChanges.html
I think the latency here is very high, isn't it (hundreds of
milliseconds to seconds)?
--
Rick
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