[erlang-questions] Tool for performace evaluation

Mazen Harake <>
Tue May 31 10:53:30 CEST 2011


Not per process since they aren't actual OS processes. You should look
at "Reductions" because that tells you how "active" a process is. You
can also look at "RpI" which means "Reductions per Interval" which
means how active the node has been since the tool last polled it.

In terms of actual process usage of the virtual machine you can simply
use top but it is very hard to determine how much CPU an individual
process uses.

/M

On 31 May 2011 09:42, Andy W. Song <> wrote:
> Is it possible to track processes' CPU usage?
> Thanks
> Andy
>
> 2011/5/31 Mazen Harake <>
>>
>> Message Queue, Heap size, Stack size and Heap Total
>>
>> On 31 May 2011 09:20, Andy W. Song <> wrote:
>> > That works, thanks. Can you explain a little bit what those columns
>> > means
>> > such as hsize?
>> > Regards
>> > Andy
>> > 2011/5/31 Mazen Harake <>
>> >>
>> >> Try entop instead.
>> >>
>> >> https://github.com/mazenharake/entop
>> >>
>> >> /M
>> >>
>> >> On 31 May 2011 08:32, Andy W. Song <> wrote:
>> >> > I run Erlang on a remote machine through SSH. When I fire up etop it
>> >> > get:
>> >> > 1> etop:start().
>> >> > Application initialization failed: no display name and no $DISPLAY
>> >> > environment variable
>> >> > Error in startup script: no display name and no $DISPLAY environment
>> >> > variable
>> >> >     while executing
>> >> > "load /usr/lib/libtk8.4.so.0 Tk"
>> >> >     ("package ifneeded" script)
>> >> >     invoked from within
>> >> > "package require Tk 8.3"
>> >> >     (file "/usr/lib/erlang/lib/gs-1.5.12/priv/gstk.tcl" line 7)
>> >> > How can I use text mode?
>> >> > Thanks
>> >> > Andy
>> >> > On Mon, May 23, 2011 at 8:26 PM, Gustav Simonsson
>> >> > <> wrote:
>> >> >>
>> >> >> etop:start().
>> >> >>
>> >> >> gives information similar to 'top' in UNIX:
>> >> >> http://www.erlang.org/doc/man/etop.html
>> >> >>
>> >> >> Regards,
>> >> >> Gustav Simonsson
>> >> >>
>> >> >> ----- Original Message -----
>> >> >> From: "Muhammad Yousaf" <>
>> >> >> To: 
>> >> >> Sent: Monday, May 23, 2011 1:00:32 PM GMT +01:00 Amsterdam / Berlin
>> >> >> /
>> >> >> Bern
>> >> >> / Rome / Stockholm / Vienna
>> >> >> Subject: [erlang-questions] Tool for performace evaluation
>> >> >>
>> >> >>
>> >> >> Hi,
>> >> >>
>> >> >> Is there any tools to evaluate the performance of a module in Erlang
>> >> >> that
>> >> >> can show graphical interface for time elapse, memory usage,
>> >> >> performance
>> >> >> benchmarks etc ??
>> >> >>
>> >> >> or is there any alternative to do this in Erlang
>> >> >>
>> >> >> Thanks in advance
>> >> >>
>> >> >> Regards,
>> >> >>
>> >> >>
>> >> >> Muhammad Yousaf
>> >> >>
>> >> >>
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> 有志者,事竟成,破釜沉舟,百二秦关终属楚
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