On Mon, Jan 17, 2011 at 20:36, Bakul Shah <bakul+plan9@bitblocks.com> wrote:
> On Mon, 17 Jan 2011 11:56:22 EST erik quanstrom <quanstro@labs.coraid.com>  wrote:
>> > strace tells you what system calls were made and when.  To
>> > find out which functions use most time, compile with -pg and
>> > look at the gprof output once done.  That 14 seconds were
>> > probably spent computing dependencies.  You can convert your
>> > test.mk to a Makefile with a trivial sed script. See what
>> > bsdmake or gmake does with it time wise. {bsd,g}make have
>> > been been abused with huge Makefiles for far longer and are
>> > likely to be friendlier to them :-)
>>
>> why not just use prof, which is exactly the tool for the job?
>
> Ciprian specified plan9ports. Recipe for building a profiling
> mk on unix:
>
>    cd $PLAN9/src/cmd/mk
>    9 mk clean
>    CC9="gcc -pg" 9 mk all
>
> Then:
>
>    mk=$PLAN9/src/cmd/mk/o.mk
>    cd <source dir>
>    9 mk clean
>    9 $mk
>    gproff $mk > mk.gprof
>
> This will show where time is being spent.


    Actually I'm using the `mk` from
`http://swtch.com/plan9port/unix/mk-with-libs.tgz` which I'm assuming
is an extract of the `plan9port` sources. As such in order to build it
I had to resort to updating the Makefile, but I didit.

    Attached is the output of running `gprof` as specified.

    Thanks,
    Ciprian.