How to find where pharo is killing processor power?
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How to find where pharo is killing processor power?
 
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hey all.. my current pharo implementation is running super serious processor power, but it shouldn’t be doing much.  how would I go about tracking this inside the pharo image? Thanks! ---- peace, sergio photographer, journalist, visionary Public Key: http://bit.ly/29z9fG0 #BitMessage BM-NBaswViL21xqgg9STRJjaJaUoyiNe2dV http://www.Village-Buzz.com http://www.ThoseOptimizeGuys.com http://www.coffee-black.com http://www.painlessfrugality.com http://www.twitter.com/sergio_101 http://www.facebook.com/sergio101 |
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Re: How to find where pharo is killing processor power?
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Re: How to find where pharo is killing processor power?
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In reply to this post by sergio_101
Are you aware of the profile tools inside Pharo ? They capture execution and offer detailed analysis of how much time is spent on each task. One of it can be found in World Menu -> Tools -> Time Profiler
Generally speaking a while loop that runs all the time without any kind of delays is a very popular way to consume 100%. Even if the while loop does nothing it will still consume %100 because even executing an empty loops has costs. Two solution is inserting a delay in the loop so the loop have to wait for 1 millisecond or less depending your demands or just make sure the loop has a very specific condition so it executes only when you need to. On Wed, Aug 16, 2017 at 10:04 PM sergio ruiz <[hidden email]> wrote:
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Re: How to find where pharo is killing processor power?
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On Thu, Aug 17, 2017 at 7:53 PM, Dimitris Chloupis <[hidden email]> wrote:
Thats good for a normal behaving process, but I'm not sure it helps identify a currently-misbehaving process. A (virtual)CPU % could be useful addition to Process Browser. cheers -ben
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Re: How to find where pharo is killing processor power?
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it depends what you mean if you talk about Pharo code then those tools should be enough , unless it freezes Pharo (a 100% consumption does not necessarily imply a freeze) if you talk about the Pharo VM itself then you will need to use one of the countless profilers that exist for C/C++ . Some OSes come included with them. MacOS which what I am using can sample a running process and tell you exactly which function/method consumes how much CPU. Obviously more specialised tools can be even more of an assistance like Valgrind But then it will require knowledge of the Pharo VM internals. if it freezes pharo and you know its pharo code then its a matter of taking a look at changes file and testing on a new image one change at the time until you identify the code that causes the slow down. At least that is what I have done one time I really messed up Morphic draw loop and froze my image. On Sat, Aug 19, 2017 at 2:27 PM Ben Coman <[hidden email]> wrote:
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