Re: Hitachi djprobe mechanism

[sugita <sugita at sdl dot hitachi dot co dot jp>]

Hi,

 I'm a member of the djprobe team.

"Frank Ch. Eigler" wrote:

> Mathieu Desnoyers <compudj@krystal.dyndns.org> writes:
>
> > [...]  And as the jmp instruction is 5 bytes, there seems to be no
> > hope to find an atomic operation that will write that.
>
> There are other ways to skin the cat.  Remember, the speed of
> inserting/removing these probes is not that important.  We may be
> willing to pay extraordinary conservative synchronization costs like
> IPI, cache flushing, and so on, as long as during *execution* time,
> the probes are fast.
>
> - FChE

You're right.
To reduce the cost during execution time is our main purpose.

We hope that first we will develop the dynamic probe (djprobe)
and then discuss the static probe (marker).

Best regards,
Yumiko

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Yumiko Sugita
Hitachi, Ltd., Systems Development Laboratory
Email : sugita@sdl.hitachi.co.jp
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