[racket] The performance of fannkuch-redux

Can't you set a break point somewhere and then use gdb's 'disassemble'
command?

Robby

On Monday, February 25, 2013, James Swaine wrote:

> Hi Haiwei,
>
> AFAIK there isn't any way to see the actual instructions that the JIT is
> generating.  Why do you think it would be helpful in this case?
>
> It may be helpful to use raco decompile, however -- that allows you to see
> what the bytecode version of your program looks like (which is what is
> actually being fed to the JIT).
>
> -James
>
>
> Message: 6
>> Date: Mon, 25 Feb 2013 17:53:34 +0800
>> From: Haiwei Zhou <highfly22 at gmail.com <javascript:_e({}, 'cvml',
>> 'highfly22 at gmail.com');>>
>> To: Danny Yoo <dyoo at hashcollision.org <javascript:_e({}, 'cvml',
>> 'dyoo at hashcollision.org');>>
>> Cc: users <users at racket-lang.org <javascript:_e({}, 'cvml',
>> 'users at racket-lang.org');>>
>> Subject: Re: [racket] The performance of fannkuch-redux
>> Message-ID:
>>         <CABLXuO9nJAUa=Xn7779377NPnoQX6Ze3Tdkf6bvF=
>> sta+bG6wQ at mail.gmail.com <javascript:_e({}, 'cvml',
>> 'sta%2BbG6wQ at mail.gmail.com');>>
>> Content-Type: text/plain; charset="iso-8859-1"
>>
>> Updated a parallel version to https://github.com/highfly22/fannkuch-redux
>> It takes about 1m50s in the four cores PC, while the script in the
>> shoutout
>> takes about 4m30s. It looks like the task division is not perfect.
>>
>> I am just curious on the native implement of JIT. How to dump assemble
>> code
>> after JIT?
>>
>> When I try to define count-flips as a macro, racket complains "to many
>> forms"? What does that mean?
>>
>> Thanks,
>> Haiwei
>>
>>
>> On 24 February 2013 11:03, Danny Yoo <dyoo at hashcollision.org<javascript:_e({}, 'cvml', 'dyoo at hashcollision.org');>>
>> wrote:
>>
>> > >> > It's amazing fast. If it is only 6 times slower than C version. If
>> > >> > parallelizing the time consuming operations, it would be 2x slower
>> > than
>> > >> > C
>> > >> > version in the four cores CPU.
>> > >>
>> > >>
>> > >> Do you mean the version you've written, or the one in the Racket
>> > >> benchmark suite?
>> > >
>> > > It's the one in the benchmark suite.
>> >
>> >
>> > What does the code look like if you add the parallelizing?  Can you
>> > show us?   Thanks!
>> >
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