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Message-ID: <4B4A2DAA.2050104@superbug.co.uk> Date: Sun, 10 Jan 2010 19:42:34 +0000 From: James Courtier-Dutton <James@...erbug.co.uk> To: "Paul G. Allen" <pgallen@...il.com> CC: linux-kernel <linux-kernel@...r.kernel.org> Subject: Re: Linux Serial Performance On 09/01/10 18:57, Paul G. Allen wrote: > I am wondering, have there been any performance tests comparing Linux > serial IO to Windows and what was the result? Is it a problem in the > comm API (e.g. - the Windows DLL having better performance than the > Linux .so)? Is it a problem in the Linux serial driver itself? Is > there something I can/need to do on Linux to tweak the driver and make > it faster? > > Thanks, > > PGA > If you can narrow down the problem, one might be able to help. I would suggest that you write a test Java program that both sends and receives data on the same port and then post that source code to the list. Anyone can then plug in a serial loopback connector, and reproduce the problems you observe. Without any way to reproduce the problems you observe, there is very little chance of fixing it. I suspect the problem is probably due to interrupts and serial buffer sizes. As an aside, I would probably have used usb instead of serial as the interface. It would be faster but not a lot more expensive. Kind Regards James -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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