[mythtv] performance

[mythtv-dev@snowman.net]

A maxtor 30GB ATA-133 7200 rpm (Maxtor 6E030L0) with VIA IDE (VT82C586B) gives:
(this is a KT-400 motherboard)

happy ~ # hdparm -tT /dev/hda

/dev/hda:
Timing buffer-cache reads:   128 MB in  0.41 seconds =312.20 MB/sec
Timing buffered disk reads:  64 MB in  1.27 seconds = 50.39 MB/sec

2.4.20 has support for this chipset running at ATA-133 built in.
You can also get kernel patches from VIA to patch older kernels for
ATA-133.  I assume bigger maxtor ATA-133/7200rpm drives have
similar performance.
    M

Chuck Ferring(chuckf@fullplaymedia.com)@2002.12.13 16:44:37 +0000:
> Does anyone have a hard drive recommendation? What kind of performance
> do people get with whatever brand/model they're using?
> 
>  
> 
> -----Original Message-----
> From: Joe [mailto:joe@nationnet.com] 
> Sent: Friday, December 13, 2002 4:35 PM
> To: mythtv-dev@snowman.net
> Subject: Re: [mythtv] performance
> 
>  
> 
> I have a slower CPU/ memory and I can pause and play TV on both tuners.
> With both tuners recording, my system starts to top out. I also encode
> at 640 x 480 so it looks like the main difference is the hard drive.
> 423MB of my memory is in use for cached files meaning that 79MB is used
> for the programs to run, so I'm not sure that more memory will help.
> Whichever way you decide to go, let us know how it works out.
> 
> Chuck Ferring wrote:
> 
> 
> 
> My hard drive is pretty old, I did some tweaking with hdparm and 23 Mb
> was about the best I could do.  Would A faster hard drive or more memory
> actually increase my performance or am I CPU bound?
> 
>  
> 
> -----Original Message-----
> From: Joe [mailto:joe@nationnet.com] 
> Sent: Friday, December 13, 2002 4:02 PM
> To: mythtv-dev@snowman.net
> Subject: Re: [mythtv] performance
> 
>  
> 
> Your hard drive seems slow. Are you using ATA66 or ATA100 (80 wire
> ribbon cable)?
> 
>  I using a cheap system I built this week. My system has an Athlon XP
> 1700,  512MB PC133 ram, 2 WinTV tuner cards, SBLive, Ensoniq, 60GB IBM
> HD. 
> 
> hdparam -t returns:
>  Timing buffered disk reads:  <reads:%A0>  64 MB in  1.65 seconds =
> 38.79 MB/sec (same results multiple times)
> 
> Top returns 44% idle time, with a load averages of 0.52.
> 
> 
> Chuck Ferring wrote:
> 
> I noticed that watching live TV uses 95-100% CPU time using mpeg4
> encoding at 640 X 480.  My system is an Athlon XP 1800 with 256M PC 2100
> ram.  Running hdparm tells me that my hard drive throughput is about 23
> Mb / sec.  Is this performance about what I should expect?  If so, what
> would be the best way to increase performance, more memory, faster
> processor or faster hard drive?
> 
>  
> 
> Thanks.
> 
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-- 
------------------------------------------
Mark Ethan Trostler	mark@zzo.com
Computing Solutions	http://www.zzo.com
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