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Re: cost of kprobe and jprobe operations

From: "Frank Ch. Eigler" <fche at redhat dot com>
To: "Chen, Brad" <brad dot chen at intel dot com>
Cc: systemtap at sources dot redhat dot com
Date: Tue, 22 Feb 2005 16:53:31 -0500
Subject: Re: cost of kprobe and jprobe operations
References: <75EC4D5486CAC247B84AAAA6F96AA5580444D3AD@orsmsx402.amr.corp.intel.com>

Hi -


> [...]
> These performance discussions might be more meaningful if 
> we had explicit performance goals for systemtap. [...]
> Any thoughts on defining performance goals for systemtap?

I don't think picking numbers does harm, but I don't know how
much good that does either.  Would we stop-ship a systemtap
implementation that didn't meet the goals?  In the abstract,
should one opt to optimize vs. extend functionality?  Maybe
these questions should be put aside until something runnable
exists as a point of reference, when actual decisions might
need to be made.


- FChE

Follow-Ups:
- Re: cost of kprobe and jprobe operations
  - From: William Cohen

References:
- RE: cost of kprobe and jprobe operations
  - From: Chen, Brad

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