On Wed, Dec 15, 2010 at 6:57 AM, Shen Zhong <[email protected]> wrote:
> Dear all, > I want to get the address of each memory access. Meanwhile, I also want > to know which thread the memory access belongs to. > Now I found that we can figure out the thread id by reading from memory > address %fs+0x10. However, there might be page fault if I try to read from > this address. > I think I only need to record the thread id when there is a context > switch, in which case, the thread id information must be in the memory. > However I don't know how to detect the thread context switch in ptlsim. > Any ideas? Thanks a lot!!!!! > > Take a look at CR-3 register (control register 3). Value of this register is kept unique to the running OS threads so when there is a context switch, this value will be changed. So you can make hash of value of CR3 and memory addresses to differentiate between multiple OS threads. - Avadh > -Regards > Shen Zhong > > _______________________________________________ > http://www.marss86.org > Marss86-Devel mailing list > [email protected] > https://www.cs.binghamton.edu/mailman/listinfo/marss86-devel >
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