Date: Fri, 17 Feb 2006 13:33:51 -0800 From: Jason Evans <jasone@freebsd.org> To: Mike Jakubik <mikej@rogers.com> Cc: freebsd-current@freebsd.org Subject: Re: Virtual memory consumption (both user and kernel) in modern CURRENT Message-ID: <D51AE51A-0273-4762-AF43-24DD075617EC@freebsd.org> In-Reply-To: <43F62CF3.2000005@rogers.com> References: <20060215024339.N22450@atlantis.atlantis.dp.ua> <43F29BF5.4060300@freebsd.org> <20060216123548.GA35910@uk.tiscali.com> <20060216135138.GA16669@flame.pc> <43F525A6.3080701@rogers.com> <20060217013039.GA31540@xor.obsecurity.org> <43F6174A.7060801@rogers.com> <1091E3C1-1E93-4030-9097-D28C780F9D44@freebsd.org> <43F62CF3.2000005@rogers.com>
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On Feb 17, 2006, at 12:07 PM, Mike Jakubik wrote: > Jason Evans wrote: >> Are redzones enabled? (They are turned on by default in >> CURRENT.) You can check by reading the output from something like: >> >> MALLOC_OPTIONS=P ls >> >> Keep in mind that they use up substantial extra memory -- 32 bytes >> per allocation. Unless you have disabled redzones, you should >> expect much higher memory usage with jemalloc than with phkmalloc. > > ___ Begin malloc statistics ___ > Number of CPUs: 1 > Number of arenas: 1 > Cache slots: 256 > Chunk size: 16777216 (2^24) > Quantum size: 16 (2^4) > Pointer size: 4 > Number of bins: 128 > Maximum bin size: 2096 > Assertions enabled > Redzone size: 16 ^^^^^^^^^^^^^^^^ > Allocated: 22272, space used: 33554432 > > Does this mean they are enabled? and if so, how can i disable them? > Which malloc is in -current now? Yes, redzones are enabled. Redzone size is 0 when they are disabled. You can disable them by adding the following to /etc/ make.conf, then rebuilding/installing libc: CFLAGS+=-DNO_MALLOC_EXTRAS jemalloc is currently in use for CURRENT. Jason
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