Messages in this thread | | | From | "Wessler, Siegfried" <> | Subject | interrupt latency | Date | Tue, 27 Aug 2002 11:58:12 +0200 |
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Hello,
I am running and will in near future kernel 2.4.18 on an embedded system.
I have to speed up interrupt latency and need to understand how in what timing tasklets are called and arbitraded.
I have to dig deep, but the kernel tree is quiet huge. As a non kernel programmer I ask you, if anyone could give me a hint, where to start reading from and which kernel source to pick first.
Any help highly appreaciated. (BTW: I will not bother you personaly with further questions unless you give permission.)
What's behind it: We patched NMI and do some stuff we have to do very regularly in there. After NMI we have to quiet fast start a kernel or even a user space function with low latency. Also I measured 8 milliseconds after a hardware interrupt before the corresponding interrupt function is called. At RTI time it is even longer (around 12 microseconds). Need to find a way to exactly understand why, and maybe speed up a bit.
Thank You. Siegfried.
------------- HBM - Hottinger Baldwin Messtechnik GmbH Siegfried Wessler, Dipl.-Ing. Entwicklung Messverstärker T-V Im Tiefen See 45, D-64293 Darmstadt Fon: 06151/803-884, Fax: -524 eMail: siegfried.wessler@hbm.com - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.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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