Date: Thu, 17 Jul 2008 10:05:52 -0400 From: John Baldwin <jhb@freebsd.org> To: freebsd-hackers@freebsd.org Cc: Michael B Allen <ioplex@gmail.com> Subject: Re: Pls sanity check my semtimedop(2) implementation Message-ID: <200807171005.53148.jhb@freebsd.org> In-Reply-To: <78c6bd860807121611w4f6ab44brbebfffea9929682a@mail.gmail.com> References: <78c6bd860807121611w4f6ab44brbebfffea9929682a@mail.gmail.com>
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On Saturday 12 July 2008 07:11:26 pm Michael B Allen wrote: > Hi, > > Below is a semtimedop(2) implementation that I'm using for FreeBSD. I > was hoping someone could look it over and tell me if they think the > implementation is sound. > > The code seems to work ok but when stressing the FreeBSD build of my app > I have managed to provoke errors related to concurrency (usually when a > SIGALRM goes off). The Linux build works flawlessesly so I'm wondering > about this one critical function that is different. > > Do you think it would make any difference if I used > ITIMER_VIRTUAL / SIGVTALRM instead of ITIMER_REAL / SIGALRM? > > Or perhaps I should be using a different implementation entirely? What specific races are you seeing? The timer is firing too early, too late? -- John Baldwin
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