Re: [RFC] [PATCH 1/7] User Space Breakpoint Assistance Layer (UBP)

From: Pekka Enberg
Date: Mon Jan 18 2010 - 07:51:18 EST

On Mon, Jan 18, 2010 at 2:44 PM, Srikar Dronamraju
<srikar@xxxxxxxxxxxxxxxxxx> wrote:
> * Avi Kivity <avi@xxxxxxxxxx> [2010-01-18 14:17:10]:
>> On 01/18/2010 02:13 PM, Pekka Enberg wrote:
>> >So how big chunks of the address space are we talking here for uprobes?
>> That's for the authors to answer, but at a guess, 32 bytes per probe
>> (largest x86 instruction is 15 bytes), so 32 MB will give you a
>> million probes.  That's a piece of cake for x86-64, probably harder
>> to justify for i386.
> On x86, each probe takes 16 bytes.

And how many probes do we expected to be live at the same time in
real-world scenarios? I guess Avi's "one million" is more than enough?
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