Hi Ashutosh,
In most cases, there is no measurable impact or overhead when
running under dmtcp_launch. We do put wrapper functions around
certain system calls, but these are very lightweight.
If you're seeing a noticeable impact, which then goes away
after restart, then that's particularly intriguing.
Could you give us some more details about what application you
are running? If there is a version of this that you can send us,
we'd like to try it locally. This forum is public, but you're also
welcome to write directly to us, and we could analyze this offline.
Best,
- Gene
On Fri, Sep 23, 2016 at 03:49:15PM +0000, Ashutosh Varma wrote:
> Hi,
>
> Has there been any data collected by users on if running an environment under
> dmtcp_launch/dmtcp_coordinator affects runtime performance or does not?
> In our case, we do see some noticeable impact, and need to understand why.
> After restore of checkpoint, almost normal runtime performance is seen.
>
> Thanks.
>
> -Ash
>
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