<div>Thanks for all your help. I've tried your commandline, the result shows for --preset slow, CPU ultilize only 700+ and fps is 70.46. The CPU power is still largely wasted.</div>
<div> </div>
<div>The disk bandwidth is I also tried <em>--preset ultrafast</em>, the fps can achieves to 800+, which means that disk bandwidth shouldn't be our bottle-neck.<br><br></div>
<div class="gmail_quote">2010/4/6 Alex Jurkiewicz <span dir="ltr"><<a href="mailto:alex@bluebottle.net.au">alex@bluebottle.net.au</a>></span><br>
<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">Hi,<br><br>
<div class="gmail_quote">
<div class="im">On 6 April 2010 19:52, kenter <span dir="ltr"><<a href="mailto:kenter83@gmail.com" target="_blank">kenter83@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0pt 0pt 0pt 0.8ex; BORDER-LEFT: rgb(204,204,204) 1px solid">
<div>Hi, Experts:</div>
<div> I have a server with 24 AMD CPUs equipped, however, when I set x264 with --threads 36 <i>(36 means 24*1.5)</i>, I found the CPU usage only 800+, which means only 8 CPU cores are filled. </div></blockquote></div>
<div><br>1.5*(logical cores available) is the default, so no need to set it.<br> </div>
<div class="im">
<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0pt 0pt 0pt 0.8ex; BORDER-LEFT: rgb(204,204,204) 1px solid">
<div> I also use top -H -p PID to detect the real threads count of x264 proc, It shows 15 threads runs simutaneous at peak, I need help that How can I fully ultilize the CPU power?</div>
<div> </div>
<div> My command line is:</div>
<div> SRC_FILE.yuv 720x576</div></blockquote></div>
<div><br>You may be constrained by the bandwidth of your disk reading the raw source file.<br> </div>
<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0pt 0pt 0pt 0.8ex; BORDER-LEFT: rgb(204,204,204) 1px solid">
<div>-I 250 -i 25 </div></blockquote>
<div><br>Defaults.<br> </div>
<div class="im">
<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0pt 0pt 0pt 0.8ex; BORDER-LEFT: rgb(204,204,204) 1px solid">
<div>-b 4 --b-adapt 1 --b-bias 0 --ref 6 --deblock 0:0 --bitrate 500 --qpmin 2 --qpmax 51 --qpstep 3 --ratetol 8.0 --aq-mode 0 --sar 16:15 --ipratio 1.25 --pbratio 1.25 --pass 0 --partitions all --cqm flat --direct spatial --mvrange-thread 24 --me hex --merange 16 --subme 6 --psy-rd 1.0:0.0 --mixed-refs --8x8dct --no-chroma-me --no-fast-pskip --trellis 0 --nr 0 --threads 36 --vbv-bufsize 2000 --vbv-init 0.75 --aq-strength 1 --chroma-qp-offset 10 --weightb --fps 25 -o output_file.264</div>
</blockquote></div>
<div><br>Some of those options are defaults (qpmax), some are non-functional (vbv-bufsize without maxrate) and some are just crazy (pass 0?!). Try this commandline:<br>x264 SRC 720x576 --bitrate 500 --preset slow --bitrate 500 --output OUT<br>
</div>
<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0pt 0pt 0pt 0.8ex; BORDER-LEFT: rgb(204,204,204) 1px solid">
<div> </div>
<div> Thanks!</div>
<div class="im"><br>_______________________________________________<br>x264-devel mailing list<br><a href="mailto:x264-devel@videolan.org" target="_blank">x264-devel@videolan.org</a><br><a href="http://mailman.videolan.org/listinfo/x264-devel" target="_blank">http://mailman.videolan.org/listinfo/x264-devel</a><br>
<br></div></blockquote></div><font color="#888888"><br>Alex<br></font><br>_______________________________________________<br>x264-devel mailing list<br><a href="mailto:x264-devel@videolan.org">x264-devel@videolan.org</a><br>
<a href="http://mailman.videolan.org/listinfo/x264-devel" target="_blank">http://mailman.videolan.org/listinfo/x264-devel</a><br><br></blockquote></div><br>