From: "Peter A. Bigot" <pab@pabigot.com>
To: Khem Raj <raj.khem@gmail.com>
Cc: "meta-ti@yoctoproject.org" <meta-ti@yoctoproject.org>
Subject: Re: poor performance of OpenEmbedded on BeagleBoneBlack compared to Debian
Date: Thu, 04 Sep 2014 05:55:53 -0500 [thread overview]
Message-ID: <54084539.9040103@pabigot.com> (raw)
In-Reply-To: <CAMKF1srA8gnfNF+myYTSm+VHjBeGCWwAC22y2OmrKYnkJffuQg@mail.gmail.com>
On 09/04/2014 12:39 AM, Khem Raj wrote:
> On Wed, Sep 3, 2014 at 6:59 PM, Peter A. Bigot <pab@pabigot.com> wrote:
>> debian@beaglebone:~$ g++ -Ofast -mfloat-abi=hard -o card card.cpp
>> debian@beaglebone:~$ time ./card > /dev/null
>> real 4m54.846s
>> user 4m54.627s
>> sys 0m0.057s
>>
>> With poky master + meta-ti it runs this fast:
>>
>> root@beaglebone:~# time ./card > /dev/null
>> real 9m37.901s
>> user 9m37.200s
>> sys 0m0.150s
>
> you should enable hardfloat ABI for poky as well for this kind of load.
Yeah, I remember that from the big argument back in oe-core, but what's
lacking in all that is any revelation of exactly how to do that.
The poky build using meta-ti's BSP for beaglebone puts gcc and
gcc-runtime into cortexa8t2hf-vfp-neon-poky-linux-gnueabi which AFAICT
is supposed to be hard-float.
-mfloat-abi=hard is being passed when gcc-runtime is built, and when the
application is built.
What toolchain-build or runtime-build enables hardfloat if that isn't
already being done?
Peter
next prev parent reply other threads:[~2014-09-04 10:55 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-04 1:59 poor performance of OpenEmbedded on BeagleBoneBlack compared to Debian Peter A. Bigot
2014-09-04 2:46 ` Robert Nelson
2014-09-04 10:46 ` Peter A. Bigot
2014-09-04 5:39 ` Khem Raj
2014-09-04 10:55 ` Peter A. Bigot [this message]
2014-09-04 12:33 ` Dmytriyenko, Denys
-- strict thread matches above, loose matches on Subject: below --
2014-09-04 14:50 poor performance of OpenEmbedded on, " Mikhail Zakharov
2014-09-04 15:00 ` Denys Dmytriyenko
2014-09-04 15:37 ` Peter A. Bigot
2014-09-04 15:41 ` Peter A. Bigot
2014-09-04 17:50 ` Peter A. Bigot
2014-09-04 15:48 ` Denys Dmytriyenko
2014-09-04 15:55 ` Robert Nelson
2014-09-04 18:10 ` Denys Dmytriyenko
2014-09-04 19:03 ` Robert Nelson
2014-09-04 19:09 ` Denys Dmytriyenko
2014-09-04 19:04 ` Peter A. Bigot
2014-09-04 19:07 ` Robert Nelson
2014-09-04 19:09 ` Robert Nelson
2014-09-04 19:41 ` Denys Dmytriyenko
2014-09-04 15:55 ` Peter A. Bigot
2014-09-04 19:48 ` Khem Raj
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