[mythtv] performance

Fri, 13 Dec 2002 16:07:53 -0800

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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?

=20

-----Original Message-----
From: Joe [mailto:joe@nationnet.com]=20
Sent: Friday, December 13, 2002 4:02 PM
To: mythtv-dev@snowman.net
Subject: Re: [mythtv] performance

=20

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.=20

hdparam -t returns:
 Timing buffered disk reads:  <reads:=A0>  64 MB in  1.65 seconds =3D =
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?

=20

Thanks.

_______________________________________________ mythtv-dev mailing list =
mythtv-dev@snowman.net =
http://www.snowman.net/mailman/listinfo/mythtv-dev

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<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>My hard drive is pretty old, I did =
some
tweaking with hdparm and 23 Mb was about the best I could do.=A0 Would A =
faster
hard drive or more memory actually increase my performance or am I CPU =
bound?</span></font></p>

<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>&nbsp;</span></font></p>

<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D2 =
face=3DTahoma><span
style=3D'font-size:10.0pt;font-family:Tahoma'>-----Original =
Message-----<br>
<b><span style=3D'font-weight:bold'>From:</span></b> Joe
[mailto:joe@nationnet.com] <br>
<b><span style=3D'font-weight:bold'>Sent:</span></b> Friday, December =
13, 2002
4:02 PM<br>
<b><span style=3D'font-weight:bold'>To:</span></b> =
mythtv-dev@snowman.net<br>
<b><span style=3D'font-weight:bold'>Subject:</span></b> Re: [mythtv] =
performance</span></font></p>

<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D3 =
face=3D"Times New Roman"><span
style=3D'font-size:12.0pt'>&nbsp;</span></font></p>

Your hard drive seems slow. Are you using =
ATA66 or
ATA100 (80 wire ribbon cable)? 
 
&nbsp;I using a cheap system I built this week. My system has an Athlon =
XP
1700,&nbsp; 512MB PC133 ram, 2 WinTV tuner cards, SBLive, Ensoniq, 60GB =
IBM HD.
 
 
hdparam -t returns: 
&nbsp;Timing buffered disk <a href=3D"reads:&nbsp;">reads:&nbsp;</a> 64 =
MB
in&nbsp; 1.65 seconds =3D 38.79 MB/sec (same results multiple times) 
 
Top returns 44% idle time, with a load averages of 0.52. 
 
 
Chuck Ferring wrote:

<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D2 =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial'>I noticed that watching =
live TV uses
95-100% CPU time using mpeg4 encoding at 640 X 480.&nbsp; My system is =
an
Athlon XP 1800 with 256M PC 2100 ram.&nbsp; Running hdparm tells me that =
my
hard drive throughput is about 23 Mb / sec.&nbsp; Is this performance =
about
what I should expect?&nbsp; If so, what would be the best way to =
increase
performance, more memory, faster processor or faster hard =
drive?</span></font></p>

<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D2 =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial'>&nbsp;</span></font></p>

<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D2 =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial'>Thanks.</span></font></p>

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