Hi,<br><br><div class="gmail_quote">On 6 April 2010 19:52, kenter <span dir="ltr"><<a href="mailto:kenter83@gmail.com">kenter83@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<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>
<br>1.5*(logical cores available) is the default, so no need to set it.<br> </div><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<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><br>You may be constrained by the bandwidth of your disk reading the raw source file.<br> </div><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<div> -I 250 -i 25 </div></blockquote><div><br>Defaults.<br> </div><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"><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><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="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<div> </div>
<div> Thanks!</div>
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<br></blockquote></div><br>Alex<br>