Date: Sat, 29 Oct 2011 15:51:07 -0700 From: Garrett Cooper <yanegomi@gmail.com> To: Lev Serebryakov <lev@serebryakov.spb.ru> Cc: "arch@freebsd.org" <arch@freebsd.org> Subject: Re: [PATCH] fadvise(2) system call Message-ID: <3C5CF500-E0D7-4E65-A98B-088ACC11F2D6@gmail.com> In-Reply-To: <458756137.20111030024046@serebryakov.spb.ru> References: <201110281426.00013.jhb@freebsd.org> <4EAB550E.3060603@FreeBSD.org> <458756137.20111030024046@serebryakov.spb.ru>
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On Oct 29, 2011, at 3:40 PM, Lev Serebryakov <lev@serebryakov.spb.ru> wrote:= > Hello, Doug. > You wrote 29 =1B$B'`'\'d'q'R'b'q=1B(B 2011 =1B$B'T=1B(B., 5:21:18: >=20 >>> You can read the description of posix_fadvise() (which this implements) h= ere: >> If you want a real-world consumer of posix_fadvise you can take a look >> at net-p2p/libtorrent-rasterbar15. The code is ifdef'ed out for FreeBSD >> because we don't have that yet, but it should be obvious how to >> re-enable it. There are a few clients that use that lib, qbittorrent is >> probably the most straightforward. > net-p2p/transmission-daemon could be used, too. It shows very poor > performance on UFS (90% in pread() call and 50% of wall time to > saturate 40Mbit/s channel from fast disk) compared to Linux, where > such interface exists. Pretty sure it would help rsync and samba as well based on some quick googli= ng.. -Garrett=
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