FreeBSD performance on single CPU.

[Channa]

Hi,
Thank you very much for your information.

I am using current implementation of FreeBSD malloc.
I am checking the performance on single CPU machine.

I am using it in my own environment i am not using FreeBSD7.0.

I disabled the MALLOC_DEBUG option in the malloc implementaton
and checked the performance i see no difference the results are the same.

./mallco-test
Starting test...
Thread -1101005488 adjusted timing: 4.495931 seconds for 1000000
requests of 512 bytes.

Could please tell me if anything else needs to be changed.?

Thanks in Advance,
Channa

2008/11/19 Ivan Voras <ivoras at freebsd.org>:
> Channa wrote:
>> Hi,
>>
>> I am using FreeBSD malloc from the current working branch.
>> I hope its jemalloc.
>>
>> I tested it on a single CPU machine i could get the following results
>>
>> # ./malloc-test  1024 10000000 4
>>
>> Starting test...
>> Thread -1096811184 adjusted timing: 102.369100 seconds for 10000000
>> requests of 1024 bytes.
>> Thread -1101005488 adjusted timing: 103.212512 seconds for 10000000
>> requests of 1024 bytes.
>> Thread -1098908336 adjusted timing: 103.491399 seconds for 10000000
>> requests of 1024 bytes.
>> Thread -1094714032 adjusted timing: 103.605124 seconds for 10000000
>> requests of 1024 bytes.
>>
>> I checked the result in the FreeBSD mailing list link given below:
>>
>> http://unix.derkeiler.com/Mailing-Lists/FreeBSD/current/2005-12/msg00294.html
>>
>> The jemalloc gives very good results. Is that the performance is good
>> only on SMP?
>>
>> Or on single processor also it should perform well?
>>
>> But on single CPU i could see bad results.
>>
>> Could anyone help me out?
>
> Your message is not very clear but here are some things that might help you:
>
> 1) -CURRENT has debugging enabled both in kernel and in malloc. You need
> to disable both before benchmarking anything.
> 2) According to the post you linked, jemalloc should be 1.1 times faster
> for single-threaded processes than phkmalloc, on that particular
> benchmark. This benefit will probably also be visible on single-CPU
> machines.
> 3) You don't need to run -CURRENT to get jemalloc - it is also prosent
> in 7.0.
>
>