Messages in this thread | | | Subject | context switch code question | From | Robert Schweikert <> | Date | 17 Apr 2003 17:19:32 -0400 |
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Can someone please point me to the context switching code. I am interested in the context switch structure and the values that are saved. I am chasing a weird problem with some numerical code that uses mmx instructions to get flush to zero to work. Specifically I am calling the
_MM_SET_FLUSH_TO_ZERO_MODE
macro which in turn ends up calling _mm_setcsr(), wherever that might be implemented.
What I am trying to figure out is a.) is this register value properly set/reset during context switch and b.) is this particular register properly transfered when the process gets moved to another CPU.
I assume that this is a configurable option in the kernel since PII and Pentium do not have this instruction, and thus it could just be that my kernel is not configured correctly.
I tried to find this type of info without posting but failed.
Thanks, Robert -- Robert Schweikert <Robert.Schweikert@abaqus.com> ABAQUS - 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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