<div>Thanks for reply </div>
<div> </div>
<div>what is CONFIG_NO_HZ</div>
<div> </div>
<div>can we enable CONFIG_NO_HZ and CONFIG_HZ both in our config </div>
<div> </div>
<div>and what the drawback of dynamic CONFIG_NO_HZ tick. </div>
<div> </div>
<div> </div>
<div> </div>
<div> <br><br></div>
<div class="gmail_quote">On Tue, Jun 26, 2012 at 10:47 AM, Mulyadi Santosa <span dir="ltr"><<a href="mailto:mulyadi.santosa@gmail.com" target="_blank">mulyadi.santosa@gmail.com</a>></span> wrote:<br>
<blockquote style="BORDER-LEFT:#ccc 1px solid;MARGIN:0px 0px 0px 0.8ex;PADDING-LEFT:1ex" class="gmail_quote">Hi... :)<br>
<div><br>On Tue, Jun 26, 2012 at 12:10 PM, solmac john <<a href="mailto:johnsolmac@gmail.com" target="_blank">johnsolmac@gmail.com</a>> wrote:<br>> I am using ARM multicore board and by default<br><br></div>okay, I am answering it from what I know about HZ impact on x86...<br>
<br>> CONFIG_HZ=250<br><br>looks good... a middle safe number, not too high not too low...<br>
<div><br>> Query: - 1- How to decide HZ for particular hardware<br><br></div>it's you who decide...do you want finer grained timer? or coarse one?<br><br>the impact is usually toward latency and responsiveness....together<br>
with preemption model you choose actually.<br>
<div><br>> 2- Which is the best open source tool to test system<br>> performance from given HZ.<br><br></div>run your application in that platform and see if it gives you impact.<br>from my experience, unless you need application that is sensitive in<br>
timing such as MIDI sequencer, you won't notice the difference.<br><span><font color="#888888"><br>--<br>regards,<br><br>Mulyadi Santosa<br>Freelance Linux trainer and consultant<br><br>blog: <a href="http://the-hydra.blogspot.com/" target="_blank">the-hydra.blogspot.com</a><br>
training: <a href="http://mulyaditraining.blogspot.com/" target="_blank">mulyaditraining.blogspot.com</a><br></font></span></blockquote></div><br>