Attachment 83676 Details for Bug 210808 – Comment on second email

Comment on second email

email3.txt (text/plain), 1.05 KB, created by Marc Khouzam

on 2007-11-23 15:04:01 EST

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Creator: Marc Khouzam

Created: 2007-11-23 15:04:01 EST

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patch

obsolete

>-----Original Message-----
>From: dsdp-dd-dev-bounces@eclipse.org
>[mailto:dsdp-dd-dev-bounces@eclipse.org]On Behalf Of Daniel Jacobowitz
>Sent: Wednesday, November 21, 2007 08:46
>To: dsdp-dd-dev@eclipse.org
>Subject: Re: [dsdp-dd-dev] GDB/MI command enhancements
>
>On Tue, Nov 20, 2007 at 01:25:13PM +1300, Nick Roberts wrote:
>> (gdb) 
>> -var-list-children var1
>> ...
>> time={wallclock="0.22846",user="0.17201",system="0.02000"}
>> 
>> (gdb) 
>> -var-list-children --all-values var2
>> ...
>> time={wallclock="0.27797",user="0.21201",system="0.01600"}
>> 
>> So, in this case, most of the time appears to be taken creating the variable
>> objects rather than storing their value.
>> 
>> Using -var-evaluate-expression many times will require many transactions through
>> a pty but I don't know how to compute that overhead.
>
>A bigger problem is that you're using a native debugger.  Access to
>the target memory is relatively fast.  For a lot of embedded targets,
>access is much slower than native speeds; reading memory becomes the
>dominant time delay.
>
>-- 
>
>Daniel Jacobowitz
>
>CodeSourcery
>

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