Date: Fri, 10 Nov 2006 21:53:10 +0000 From: Matthew Seaman <m.seaman@infracaninophile.co.uk> To: freebsd-java@freebsd.org Subject: Re: Performance of Java on FBSD vs. others... Message-ID: <4554F4C6.3090802@infracaninophile.co.uk> In-Reply-To: <20061110213313.GA72658@ace.b020.ceid.upatras.gr> References: <20061110203714.GA89006@ace.b020.ceid.upatras.gr> <20061110124459.M88944@turing> <20061110213313.GA72658@ace.b020.ceid.upatras.gr>
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This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enig1A004A43291D54FA66B7B6B5 Content-Type: text/plain; charset=ISO-8859-15 Content-Transfer-Encoding: quoted-printable Nikos Ntarmos wrote: > On Fri, Nov 10, 2006 at 12:54:25PM -0800, Nick Johnson wrote: =20 >> I can't think of any other reason there'd be such a difference between= >> OSes. Maybe someone else has some ideas. >=20 > I was thinking something along the lines of "there are bits and pieces > of jre/jdk implemented in native code and fbsd doesn't have'em yet", or= > (hopefully) "you have to sysctl-turn a.b.c on"... >=20 > I'm really interested in hunting this down, since I'm going to spend a > considerable part of the next few weeks running even larger versions of= > the program in question, and switching back and forth between freebsd > (OS-of-choice for coding) and win32 (apparently the fastest of the > three in executing the code) is a major pain (and loss of time). Is this the same issue with syscalls as affects MySQL? As in unconstrained calling of gettimeofday() or similar because such=20 "syscalls are free"? Which is pretty much true in Linux, at the cost of not returning the time particularly accurately. Look at http://wikitest.freebsd.org/MySQL -- especially the point about "frequent queries of the system time". Try tweaking the 'kern.timecounter.choice' sysctl and see if that makes much difference. Cheers, Matthew --=20 Dr Matthew J Seaman MA, D.Phil. 7 Priory Courtyard Flat 3 PGP: http://www.infracaninophile.co.uk/pgpkey Ramsgate Kent, CT11 9PW --------------enig1A004A43291D54FA66B7B6B5 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (FreeBSD) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFFVPTM8Mjk52CukIwRCMSNAJ4hrlKUnMOH9R4Dt3Q8TwMV8BZtmwCeISME AtaVnTYiz+BphnESpI5DKJM= =jDB/ -----END PGP SIGNATURE----- --------------enig1A004A43291D54FA66B7B6B5--
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