Date: Thu, 4 Apr 2002 20:12:28 -0700 (MST) From: John Regehr <regehr@cs.utah.edu> To: Terry Lambert <tlambert2@mindspring.com> Cc: <freebsd-hackers@FreeBSD.ORG> Subject: Re: Linuxthreads on Linux vs FreeBSD performance question Message-ID: <20020404195905.U14205-100000@beryl.cs.utah.edu> In-Reply-To: <3CACF69D.3A992FFD@mindspring.com>
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> The problem is that it's not clear what the graphs you posted > are comparing. In the context of the paper, this will probably > be mitigated somewhat. However, there are a lot of people who > will turn directly to the graphs in any paper, and yell about > them, so I doubt you are safe, not matter what you do. That's okay, I'll wear asbestos to USENIX :). > It would be useful, I think, to indicate what the benchmarks > *aren't* measuring, in the paper, in addition to what they > *are*, so that people don't make wrong application of them. > I'm not saying that they aren't figures of merit, only that > the scope of the merit is not well defined. You're right. I'll try to do this. > > If it would help draw the flames now, while I can still do something > > about it (paper is due around Apr 15), I'd be happy to post a pointer to > > my paper. > > I think that would help, but if you are going to publish and > present, you probably want to limit distribution. 8-(. I'll send a pointer to the paper to this list in a couple of days -- at present I still have a couple of sections incomplete. I think the tool I describe will be interesting and useful for FreeBSD scheduler people; it's a nice thing to have around for taking quick measurements without futzing with the kernel. > I don't klnow if you are using USER_LDT in your compiled FreeBSD > kernels, or if you have done any other tuning of the FreeBSD to > make it perform worse (or better( than GENERIC, as shipped, but > USER_LDT will seriously drop performance as well. I'll check with our FreeBSD kernel guy. Thanks for pointers to kernel functions. > apples == newer version of Linux. > > oranges == maintenance release of FreeBSD that was never supposed > to happen because 5.0 was supposed to be out by now. Ok, got it. I don't follow the releases very closely and tend to be unaware of the finer distinctions... Thanks again, John To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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