Re: psyco-dist not supported on 64 bit Linux

From: Ulf Samuelsson <ulf_samuelsson@telia.com>
To: openembedded-devel@lists.openembedded.org
Subject: Re: psyco-dist not supported on 64 bit Linux
Date: Thu, 13 Oct 2011 02:31:21 +0200	[thread overview]
Message-ID: <4E963159.6020304@telia.com> (raw)
In-Reply-To: <4E95E479.7070802@gmail.com>

On 2011-10-12 21:03, Khem Raj wrote:
> On 10/12/2011 12:18 AM, Ulf Samuelsson wrote:
>> On 2011-10-11 01:30, Ulf Samuelsson wrote:
>>> On 2011-10-10 23:35, Denys Dmytriyenko wrote:
>>>> On Mon, Oct 10, 2011 at 11:24:18PM +0200, Ulf Samuelsson wrote:
>>>>> psyco-dist will not run on a 64 bit linux.
>>>>> The guys behind psyco-dist recommends the use of PyPy
>>>>>
>>>>> What is the recommendation for 64 bit linux?
>>>>>
>>>>> Just run without JIT?
>>>>> Don't run on a 64 bit linux?
>>>>> Anything else?
>>>> Yes, not supporting 64-bit hosts is one of the known limitations of
>>>> psyco.
>>>> Being stuck with Python 2.6 is another limitation.
>>>>
>>>> But, latest bitbake appears to be quite fast even w/o using psyco
>>>> these days.
>>>> Especially with parallel parsing on multiple cores...
>>>>
>>>
>>> OK, I will try without JIT then.
>>>
>> Now I have some results.
>>
>> Building a custom x11 image on a 32 bit Ubuntu 10.10/psyco-dist took 91
>> minutes.
>> Building the same image on a 64 bit Ubuntu 11.04 without psyco-dist took
>> 109 minutes
>> (The last machine was an i7-920 w 4 GB RAM)
>> The first might be the same, alternatively it was a machine with 6 GB 
>> RAM.
>>
>> = It takes 20% more time on a 64 bit O/S.
>>
>
> are these on same hardware running once 32bit or and second time 64bit 
> OS ?
>>
>
>
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I have two core i7 machines
#1 Dell Studio XPS with a 2.67 GHz  920 + 4GB of RAM (2 channel)./Ubuntu 
11.04/x64
       The 109 minutes was measured on machine #1

#2 Homebuilt with a 2.67 GHz  920 + 6 GB of RAM (tri-channel)/Ubuntu 
10.04 x86
      Gigabyte UD5 Motherboard
      The   91 minutes was measured on machine #2.

Both are using the same type of disk Western Digital Black 1 TB
and have 1333 MHz memories.

I tried Ubuntu 11.04 / x86 on machine #1 using an external e-SATA 
Seagate disk
some time ago. I do not have the exact figures, but It was within minutes
of machine #2, so I think it is safe to assume that the extra time
is there due to the lack of JIT compiling.

End of this week, I hope to try on a 4.4 GHz (overclocked) Core-i7 
2600k/Ubuntu 11.10/x64.
Still only 1333 MHz memory unfortunately.

-- 
Best Regards
Ulf Samuelsson