On Thu, 5 Oct 2006 08:29:36 +0800 David Xu <[EMAIL PROTECTED]> wrote:
> On Thursday 05 October 2006 05:40, Jonathan Chen wrote: > > Hello, > > > > I'm currently writing kernel code to use MCA (machine check architecture) > > in order to detect things like ECC errors. As part of this, I need to run > > code on all CPUs periodically to check some status registers. Where is the > > best place to do this? It doesn't seem that I can use regular kernel > > threads since I can't specify a CPU binding with that interface. I've > > thought about hooking a function call to either the beginning of > > idle_proc() or somewhere in mi_switch(), but neither solution seems optimal > > since there are no guarantees when idle_proc() is ran and mi_switch() seems > > like a really bad idea from a performance standpoint. Suggestions? > > > > Also, are there any locking pitfalls or other issues I should be aware of > > when writing code to run in either idle_proc() or mi_switch()? > > > > -Jon > > AFAIK, you can use scheduler API, the sched_bind() moves current thread to > a specific CPU, hope this helps. > You can find examples e.g. in hwpmc driver. Just grep by sched_bin. -- Stanislav Sedov <[EMAIL PROTECTED]> [[Россия, Москва]] PGP id: 0xEB269581 http://people.freebsd.org/~stas/stas.key.asc
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