From: Siarhei Siamashka <siarhei.siamashka@nokia.com>
To: "ext Brad Midgley" <bmidgley@gmail.com>
Cc: ext Luiz Augusto von Dentz <luiz.dentz@gmail.com>,
ext Marcel Holtmann <marcel@holtmann.org>,
linux-bluetooth@vger.kernel.org
Subject: Re: SBC big endian issues?
Date: Tue, 20 Jan 2009 12:20:06 +0200 [thread overview]
Message-ID: <200901201220.06623.siarhei.siamashka@nokia.com> (raw)
In-Reply-To: <d89ddf300901190702u1c9864acwa69748ed7ca5326c@mail.gmail.com>
On Monday 19 January 2009 17:02:03 ext Brad Midgley wrote:
> > Also an interesting observation is that gstreamer is very slow. Using
> > gst-launch to encode audio file to SBC is something like 1.5 times slower
> > than sbcenc utility when benchmarked on x86 system. I wonder if
> > something could be done about this.
>
> I noticed something similar back in 3.x. On an xscale, it went from
> about 15% cpu usage under libalsa to 50% using gst-launch.
By the way, if that XScale chip is IWMMXT capable, it can benefit from SIMD
optimizations too. This should probably reduce CPU usage way below 15%.
Moreover, IWMMXT is essentially an MMX clone for ARM, so x86 MMX code can
be directly converted to it.
> Is there a best practices for gstreamer that the plugin is not following?
I'm not quite familiar with gstreamer yet, but these performance issues might
be really worth investigating...
Best regards,
Siarhei Siamashka
next prev parent reply other threads:[~2009-01-20 10:20 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-01-05 8:15 SBC big endian issues? Siarhei Siamashka
2009-01-05 15:36 ` Brad Midgley
2009-01-05 15:55 ` Siarhei Siamashka
2009-01-05 16:25 ` Brad Midgley
2009-01-05 16:29 ` Brad Midgley
2009-01-05 18:19 ` Siarhei Siamashka
2009-01-05 19:26 ` Brad Midgley
2009-01-07 12:40 ` Siarhei Siamashka
2009-01-07 13:43 ` Marcel Holtmann
2009-01-16 17:23 ` Siarhei Siamashka
2009-01-16 22:02 ` Luiz Augusto von Dentz
2009-01-17 18:10 ` Siarhei Siamashka
2009-01-19 11:26 ` Siarhei Siamashka
2009-01-19 12:05 ` Marcel Holtmann
2009-01-20 6:22 ` [Patch] SAP client plugin framework Liu, Raymond
2009-01-22 5:05 ` Liu, Raymond
2009-01-19 15:02 ` SBC big endian issues? Brad Midgley
2009-01-20 10:20 ` Siarhei Siamashka [this message]
2009-01-20 11:13 ` Siarhei Siamashka
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