Re: 64-bit Intel CPU
Re: 64-bit Intel CPU
- Subject: Re: 64-bit Intel CPU
- From: Michael Smith <email@hidden>
- Date: Tue, 27 Feb 2007 13:08:37 -0800
On Feb 27, 2007, at 10:31 AM, SK wrote:
So, in effect needs to get the (IA32e) state of the
CPU when a 64-bit application is running using a
32-bit Kernel.
Are you trying to get the application state at the time the interrupt
occurred, or the CPU state?
The application's address space size and operating mode are
irrelevant when you are running kernel code.
Previously you stated that you wanted to read the performance
counters. It's not clear how you think you'll achieve a meaningful
result doing this, as any application context that you might want to
sample can block and/or migrate between cores in an arbitrary fashion
beyond your control. You may want to talk to the Shark folks, as
they already have plumbing in place to handle these (and many other)
issues, and you may find that being a client of their infrastructure
will meet your needs.
= Mike
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