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MooglyGuy
Renegade MAME Dev
Reged: 09/01/05
Posts: 1651
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Re: MAKE - the -j option
02/27/16 02:53 PM


> > Does it matter if your CPU has "fake" cores via hyperthreading?
>
> I have a i7-2600 which I believe is 4 cores but shows as 8 in Task Manager. And, I
> can confirm that -j8 is much faster than -j4.

Correct. With enough CPU cores, you quickly end up with a bottleneck on disk I/O when compiling. This is sort of the perfect situation for hyperthreading, because while a given thread is blocked while waiting to either read from or write to the disk, another thread can be swapped in.







Entire thread
Subject Posted by Posted on
* MAKE - the -j option f205v 02/24/16 11:16 PM
. * I gonna bookmark this. Very useful to me. Dullaron  03/15/16 07:40 PM
. * Re: MAKE - the -j option TafoidAdministrator  02/25/16 01:36 AM
. * Re: MAKE - the -j option Dullaron  02/26/16 04:17 AM
. * Re: MAKE - the -j option MooglyGuy  02/26/16 03:38 PM
. * Re: MAKE - the -j option Dullaron  03/10/16 10:15 AM
. * Re: MAKE - the -j option Roberto Fresca  03/09/16 05:51 PM
. * Re: MAKE - the -j option Olivier Galibert  02/26/16 09:50 PM
. * Re: MAKE - the -j option krick  02/27/16 04:16 AM
. * Re: MAKE - the -j option Robbbert  02/27/16 04:39 AM
. * Re: MAKE - the -j option R. Belmont  03/15/16 04:50 PM
. * Re: MAKE - the -j option Roberto Fresca  03/09/16 05:48 PM
. * Re: MAKE - the -j option MooglyGuy  02/27/16 02:53 PM
. * Re: MAKE - the -j option redk9258  02/27/16 07:58 PM
. * Re: MAKE - the -j option MooglyGuy  02/28/16 08:57 AM
. * Re: MAKE - the -j option krick  02/28/16 11:58 AM
. * Re: MAKE - the -j option MooglyGuy  02/28/16 03:35 PM
. * Re: MAKE - the -j option Robbbert  02/27/16 10:11 PM
. * Re: MAKE - the -j option R. Belmont  02/25/16 05:30 PM
. * Re: MAKE - the -j option f205v  02/27/16 12:33 PM

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