From mboxrd@z Thu Jan 1 00:00:00 1970 From: Richard Braun Date: Thu, 14 Jun 2012 10:33:35 +0200 Subject: [Buildroot] [PATCH 7/7] automatically set PARALLEL_JOBS when BR2_JLEVEL is 0 In-Reply-To: <4FD921C9.4020302@mind.be> References: <1339466983-19786-1-git-send-email-ntl@pobox.com> <1339466983-19786-8-git-send-email-ntl@pobox.com> <4FD921C9.4020302@mind.be> Message-ID: <20120614083335.GA15879@mail.sceen.net> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: buildroot@busybox.net On Thu, Jun 14, 2012 at 01:27:05AM +0200, Arnout Vandecappelle wrote: > In my experience, you need 2 times the number of CPUs to fully utilize > the processor because most compilations have long iowait latencies. Unless you have little memory, this is no longer true, and as some compilations can eat a lot of memory, doubling their number reduces the amount of available page cache, potentially increasing the amount of I/O. Using the number of available processors should be just fine. -- Richard Braun