Date: Sat, 24 Nov 2018 21:45:26 -0800 From: Mark Millard <marklmi@yahoo.com> To: Ed Maste <emaste@freebsd.org> Cc: Ronald Klop <ronald-lists@klop.ws>, "freebsd-arm@freebsd.org" <freebsd-arm@freebsd.org> Subject: Re: ld.lld goes out of memory Message-ID: <6EB261C2-7B9F-43CD-95A0-1B6D82E70868@yahoo.com> In-Reply-To: <CAPyFy2BKk0on6Dwj7MYhiu5K%2BMjOEhMg1VsM8GbPnCZ0gkCKQg@mail.gmail.com> References: <op.zsz1brvbkndu52@sjakie> <CAPyFy2BKk0on6Dwj7MYhiu5K%2BMjOEhMg1VsM8GbPnCZ0gkCKQg@mail.gmail.com>
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On 2018-Nov-24, at 19:35, Ed Maste <emaste at reebsd.org> wrote: > On Sat, 24 Nov 2018 at 14:49, Ronald Klop <ronald-lists@klop.ws> wrote: >> >> Hello, >> >> While compiling databases/mongodb34 on my RPI3B+ 12.0-RC1/arm64 ld.lld >> fails often because of 'out of swap' or other issues about memory >> shortage. Is this something others experience on "low memory" machines? >> ... >> -bool lld::ThreadsEnabled = true; >> +bool lld::ThreadsEnabled = false; > > Note that lld has a --no-threads flag that should achieve the same > thing without a compile-time change. When I looked into it earlier I did not find a ports equivalent of the buildworld buildkernel global control via, say, LDFLAGS.lld+=-Wl,--no-threads The binutils linkers will not tolerate the option. So it ends up being a port-by-port adjustment as far as I could tell. It need not be just low memory machines: for N cpus, in FreeBSD terms, lld with threads enabled adds N+1 threads (not counting main's thread: N+2 total). If several lld's run at once it can get to be a lot of threads at once in a poudriere run. I've observed this fanout on a 32-hardware thread context, so 34 threads for one lld, counting the main thread. And at times I've had several compiler toolchains building at once with multiple lld's running at once. (But I did happen to have sufficient RAM for what happened.) === Mark Millard marklmi at yahoo.com ( dsl-only.net went away in early 2018-Mar)
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