RE: 24/96 playback via http://

John,

You might try without MIN_HEAP. I believe MIN_HEAP reduces the limiting size of some buffers which would probably affect http
throughput. Of course, removing MIN_HEAP means that your memory usage will go up.

Eric

=======================================
Eric Hyche ([email protected])
Principal Engineer
RealNetworks, Inc.


>-----Original Message-----
>From: [email protected] [mailto:[email protected]]
>On Behalf Of John Stirling
>Sent: Wednesday, September 02, 2009 6:12 AM
>To: Helix client dev
>Subject: [Helix-client-dev] 24/96 playback via http://
>
>We're having a few issues getting 24/96 .wav to play smoothly via
>http:// (from a local upnp server)
>
>We're using an atlas http fsys with the following HELIX_FEATURES -
>
># The basic audio only profile
>exec_profile_file("helix-client-audio-all.pf")
>
># Enable function level linking - reduces code size by approx 30%
>project.AddDefines('HELIX_CONFIG_USE_RLINK')
>
># Remove video related stuff
>project.RemoveDefines('HELIX_FEATURE_VIDEO')
>project.RemoveDefines("USE_XWINDOWS")
>project.AddDefines("HELIX_CONFIG_NO_XWINDOWS")
>
># Hopefully fixes MP3 Locker playback
>project.RemoveDefines('HELIX_FEATURE_HTTP_GZIP')
>project.AddDefines("HELIX_FEATURE_HTTP_MEMCACHE")
>project.AddDefines("HELIX_FEATURE_MIN_HEAP")
>
>
>Our CPU load for http:// playback is approx 55%. Playing the same
>content via local thumbdrive (file://) cpu load is approx 35%. So don't
>think cpu is getting overloaded.
>
>Our raw network throughput is approx 620 kB/s with 24/96 .wav content
>needing 576kB/s (measure using curl <url> > /dev/null). Fairly close to
>the edge but would have though that should be ok.
>
>Is there anything obviously wrong with our feature set or are there any
>HELIX_FEATURES or parameters that would be worth trying or adjusting ?
>
>Also, can someone explain what these features are for -
>
>HELIX_FEATURE_HTTP_MEMCACHE
>HELIX_FEATURE_MIN_HEAP
>HELIX_FEATURE_HTTPFSYS_MEM_GROWTH_LIMIT
>
>
>John
>
>
>
>
>
>
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