[Barrelfish-users] questions about phoenix kmeans

[Liyang]

OK, thanks for telling me that.

Regards,
- Liyang



2011/12/24 Peter Simon <simon.peter at inf.ethz.ch>

>  Hi Liyang,****
>
> ** **
>
> These questions are probably best asked in the Phoenix MapReduce mailing
> list (phoenix-users at lists.stanford.edu), rather than the Barrelfish list.
> The Barrelfish behavior of Phoenix should be identical to the Linux one.**
> **
>
> ** **
>
> Hope this helps,****
>
> Simon****
>
> ** **
>
> *From:* Liyang [mailto:tangliyang921 at gmail.com]
> *Sent:* Samstag, 24. Dezember 2011 03:24
> *To:* barrelfish-users at lists.inf.ethz.ch
> *Subject:* [Barrelfish-users] questions about phoenix kmeans****
>
> ** **
>
> Dear all,****
>
> ** **
>
> I've read the kmeans code here:
> http://www.lingrok.org/source/xref/barrelfish/usr/phoenix_tests/kmeans.c.
> I wonder if you maintain the code, but I don't know who else to contact.**
> **
>
> I do have some questions about using phoenix in kmeans.****
>
> ** **
>
> ** **
>
> ** **
>
> *map_reduce_args* <http://www.lingrok.org/source/xref/barrelfish/usr/phoenix_tests/kmeans.c#map_reduce_args>.L1_cache_size <http://www.lingrok.org/source/s?defs=L1_cache_size&project=barrelfish> = atoi <http://www.lingrok.org/source/s?defs=atoi&project=barrelfish>(GETENV <http://www.lingrok.org/source/s?defs=GETENV&project=barrelfish>("MR_L1CACHESIZE"));//1024 * 8;****
>
> *map_reduce_args* <http://www.lingrok.org/source/xref/barrelfish/usr/phoenix_tests/kmeans.c#map_reduce_args>.num_map_threads <http://www.lingrok.org/source/s?defs=num_map_threads&project=barrelfish> = atoi <http://www.lingrok.org/source/s?defs=atoi&project=barrelfish>(GETENV <http://www.lingrok.org/source/s?defs=GETENV&project=barrelfish>("MR_NUMTHREADS"));//8;****
>
> *map_reduce_args* <http://www.lingrok.org/source/xref/barrelfish/usr/phoenix_tests/kmeans.c#map_reduce_args>.num_reduce_threads <http://www.lingrok.org/source/s?defs=num_reduce_threads&project=barrelfish> = atoi <http://www.lingrok.org/source/s?defs=atoi&project=barrelfish>(GETENV <http://www.lingrok.org/source/s?defs=GETENV&project=barrelfish>("MR_NUMTHREADS"));//16;****
>
> *map_reduce_args* <http://www.lingrok.org/source/xref/barrelfish/usr/phoenix_tests/kmeans.c#map_reduce_args>.num_merge_threads <http://www.lingrok.org/source/s?defs=num_merge_threads&project=barrelfish> = atoi <http://www.lingrok.org/source/s?defs=atoi&project=barrelfish>(GETENV <http://www.lingrok.org/source/s?defs=GETENV&project=barrelfish>("MR_NUMTHREADS"));//8;****
>
> *map_reduce_args* <http://www.lingrok.org/source/xref/barrelfish/usr/phoenix_tests/kmeans.c#map_reduce_args>.num_procs <http://www.lingrok.org/source/s?defs=num_procs&project=barrelfish> = atoi <http://www.lingrok.org/source/s?defs=atoi&project=barrelfish>(GETENV <http://www.lingrok.org/source/s?defs=GETENV&project=barrelfish>("MR_NUMPROCS"));//16;****
>
>  ** **
>
> How could the above codes get the values for args? I mean, where are those
> MR_ environment variables defined? And what if they are not? Does the cache
> size variable has any connection with the splitter function? I know that
> phoenix schedules threads according to cache size as chunk size, but how?*
> ***
>
> ** **
>
> I would be much appreciated if you could help me with these questions. ***
> *
>
> ** **
>
> Best regards,****
>
> - Liyang****
>
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