Subject: Re: [linux-audio-user] Encrypted remote X11 app (Was Unencrypted remote X11 app, Was: headless audio apps)
From: Steve Harris (S.W.Harris_AT_ecs.soton.ac.uk)
Date: Sat Jul 31 2004 - 17:11:41 EEST
On Sat, Jul 31, 2004 at 04:07:15 -0700, Malcolm Baldridge wrote:
>
> > Comparatively, Meterbridge is responsible for blowing _loads_ of CPU
> > cycles (as reported by Qjackctl) - Alsaplayer/Ardour graphics aren't
> > loading the remote box to anything like the same extent.
> >
> > I'll try to make some comparative CPU measurements whilst recording and
> > report back, but it looks to me as though Meterbridge (probably via a
> > library) isn't making as efficient use of X as it might.
>
> It's very possible that Meterbridge's "waste" isn't in the X calls, but the
> way in which it collects information and/or performs I/O in general. Years
> ago when I first started to dabble in open source code and came upon a
> fairly popular IRC client called "BitchX". The author of that client
> decided in his infinite wisdom to basically cpu-spin on non-blocking I/Os
> for "petty" network transfers, thereby wasting about 85+% CPU to oversee a
> single client-to-client transfer that was probably running at 2-4
> kilobytes/second, tops. It was insanely bad code.
That wouldn't affect the CPU load on a remote machine. The current release
uses SDL, which problably isn't very romte friendly.
- Steve
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