Re: [PATCH 3/3] lib: vsprintf: added a put_dec() test and benchmark tool
From: Michal Nazarewicz
Date: Fri Aug 06 2010 - 16:59:53 EST
Denys Vlasenko <vda.linux@xxxxxxxxxxxxxx> writes:
> On Friday 06 August 2010 10:34, MichaÅ Nazarewicz wrote:
>> On Fri, 06 Aug 2010 07:10:06 +0200, Denys Vlasenko <vda.linux@xxxxxxxxxxxxxx> wrote:
>> > On Friday 06 August 2010 00:38, Michal Nazarewicz wrote:
>> >> This commit adds a test application for the put_dec() and
>> >> family of functions that are used by the previous two commits.
>> >> Signed-off-by: Michal Nazarewicz <mina86@xxxxxxxxxx>
>> >> +put-dec-test: put-dec-test.c
>> >> + exec $(CC) $(CFLAGS) -o $@ $<
>> > (1) Why exec?
>> Micro Makefile optimisation -- saves us a fork().
>> I'll try to fix the benchmark over the weekend and will post updated
>> version. Thanks for the comments.
> You might find some ideas in the attached file:
> * removed "correction" code
> * added verification of correctness for put_dec()
> * different rand64
> (old one was giving same "random" number surprisingly often)
> * more robust coding in a few places
Thanks! I actually changed the benchmark earlier today and redid all
benchmarks but I'll sure incorporate you're test code.
Also, I've removed rand_64() from my code in favour of reading random
data from /dev/urandom. In consequence, all functions ale benchmarked
using the same values and it's still random (ie. no the same value all
the time). This also made "correction" no longer needed.
It's 11pm here, so I'll try to send the new patches tomorrow morning
after getting some sleep.
Once again, thank you for all the comments and suggestiveness!
Best regards, _ _
.o. | Liege of Serenly Enlightened Majesty of o' \,=./ `o
..o | Computer Science, Michal "mina86" Nazarewicz (o o)
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