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Re: [bug #40639] GNU Make with profiling information

From: Tim Murphy
Subject: Re: [bug #40639] GNU Make with profiling information
Date: Sat, 11 Jan 2014 19:02:37 +0000

It's nice to know when in the build a job was scheduled. e.g I have a
huge job that gets scheduled at the end of the build - wouldn't it be
nicer if it was scheduled at the beginning?  Perhaps I can redesign my
makefile to achieve that if I know.

On 11 January 2014 18:58, Paul Smith <address@hidden> wrote:
> Sorry, I've been mostly away from my systems recently.
> On Wed, 2013-12-18 at 13:28 +0200, Eddy Petrișor wrote:
>> Thanks for clarifying this. Could you please confirm if the general
>> direction of the the is OK in the latest patch I sent?
> I will take a look.
>> What it is in scope and what I would need help with is adding relative
>> time stamp support in the profiling info instead of absolute time
>> stamps. When analyzing the 'simple' output I realised the graphs
>> looked awful because there was such such a scale difference between
>> the time stamp and duration.
>> The absolute time stamp also doesn't fit well worth the scope of the
>> 'simple' output.
> Does it have to be relative to the start of the entire build (user's
> invocation of make)?
> I understand the interest in the amount of time a given job takes to
> run, but I guess I don't understand the need for a "start time offset"
> at all.  Isn't it sufficient to record the start time of a job, then
> when it's complete show the elapsed time for that job?  Or recipe?  Or
> both?
>> I tried to pass down a reference time stamp through an environment
>> variable, but I am missing something from the processing since
>> submakes don't see the variable I defined.
> I'll take a look.
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