[racket] Performance measurement per each thread

Thanks for Matthew.

I have one more question.
I want to obtain cpu usage rate you can see it in TaskManager in windows.

TaskManager shows us a cpu usage per thread.
I looked the reference manuals in Web Site but I didn't find it.

So How can I obtain that rate value per thread?

Thanks for your reply.
Have a nice day.

Sent from my iPad

On 2012. 11. 16., at 오후 10:28, Matthew Flatt <mflatt at cs.utah.edu> wrote:

> At Fri, 16 Nov 2012 15:33:39 +0900, 주대연 wrote:
>> Hi I am a student in master course for Computer Engineering.
>>
>> I am studying Racket for my research.
>> My one of goals is to measure the performance(cpu usages, memory, i/o..etc)
>> of each thread.
>>
>> So I have two questions...
>>
>> 1) CPU, I/O usages
>>
>>    Is there any way to measure CPU usage per each thread in run-time by
>> Racket?
>
> The `current-process-milliseconds' function returns a thread-specific
> value if you give it a thread argument.
>
>> 2) Memory usages
>>
>>   Also memory usages per each thread in rum-time??
>>   As I know Linux doesn't provide the way to measure memory usage per each
>> thread.
>>   So How about Racket?
>
> You can't ask for thread-specific memory use directly, but you can ask
> for custodian-specific memory use, and every thread can have its own
> custodian.
>
> Beware of sharing among threads and how that influences memory
> accounting. For more information about custodian-based memory
> accounting, see
>
>  "Memory Accounting without Partitions"
>  Wick and Flatt, ISMM'04
>  http://dl.acm.org/authorize?730730
>  Addendum:
>    http://www.cs.utah.edu/plt/publications/ismm04-addendum.txt
>