[mythtv] performance
Joe
mythtv-dev@snowman.net
Fri, 13 Dec 2002 17:34:33 -0700
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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.<br>
<br>
Chuck Ferring wrote:<br>
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<p class="MsoNormal"><font size="2" color="navy" face="Arial"><span
style="font-size: 10pt; 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. Would A faster hard drive or more memory
actually increase my performance or am I CPU bound?</span></font></p>
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style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
<p class="MsoNormal" style="margin-left: 0.5in;"><font size="2"
face="Tahoma"><span style="font-size: 10pt; font-family: Tahoma;">-----Original
Message-----<br>
<b><span style="font-weight: bold;">From:</span></b> Joe
[<a class="moz-txt-link-freetext" href="mailto:joe@nationnet.com">mailto:joe@nationnet.com</a>] <br>
<b><span style="font-weight: bold;">Sent:</span></b> Friday, December
13, 2002 4:02 PM<br>
<b><span style="font-weight: bold;">To:</span></b>
<a class="moz-txt-link-abbreviated" href="mailto:mythtv-dev@snowman.net">mythtv-dev@snowman.net</a><br>
<b><span style="font-weight: bold;">Subject:</span></b> Re: [mythtv]
performance</span></font></p>
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face="Times New Roman"><span style="font-size: 12pt;"> </span></font></p>
<p class="MsoNormal" style="margin-left: 0.5in;"><font size="3"
face="Times New Roman"><span style="font-size: 12pt;">Your hard drive
seems slow. Are you using ATA66 or ATA100 (80 wire ribbon cable)?<br>
<br>
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. <br>
<br>
hdparam -t returns:<br>
Timing buffered disk <a href="reads:%A0">reads: </a> 64 MB in 1.65
seconds = 38.79 MB/sec (same results multiple times)<br>
<br>
Top returns 44% idle time, with a load averages of 0.52.<br>
<br>
<br>
Chuck Ferring wrote:<br>
<br>
</span></font></p>
<p class="MsoNormal" style="margin-left: 0.5in;"><font size="2"
face="Arial"><span style="font-size: 10pt; font-family: Arial;">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?</span></font></p>
<p class="MsoNormal" style="margin-left: 0.5in;"><font size="2"
face="Arial"><span style="font-size: 10pt; font-family: Arial;"> </span></font></p>
<p class="MsoNormal" style="margin-left: 0.5in;"><font size="2"
face="Arial"><span style="font-size: 10pt; font-family: Arial;">Thanks.</span></font></p>
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