I set some status for cache blocks and some counters for my own. If there is something wrong with my code, I should get segmentation fault. However this error I think says that the execution of program goes to wrong way.
I will try tracediff and reply later On 2/14/12, Ali Saidi <[email protected]> wrote: > Then the best thing to is use tracediff to see where the programs diverge > with 512k and 2MB. Have you made any changes to the simulator? > > Ali > > Sent from my ARM powered mobile device > > On Feb 14, 2012, at 12:06 AM, Mahmood Naderan <[email protected]> wrote: > >> Thing is, a benchmark works fine with a 512kB L2. However I get that >> error after chnaging to 2MB L2. >> >> >> >> On 2/14/12, Paul Rosenfeld <[email protected]> wrote: >>> You're talking about SE mode, right? >>> >>> I think this is akin to a segmentation fault in a regular program. >>> Essentially you're trying to access a virtual memory page for which the >>> address is invalid. If there was a kernel running you'd take a page fault >>> and the kernel would decide if you were allowed to access that VM page. >>> If >>> so, it would be allocated. If not, it would cause a segmentation fault. >>> I'm >>> not entirely sure what the conditions are for SE mode. You could probably >>> replicate it simply by doing: >>> >>> int *a =0; >>> int b = *a; >>> >>> >>> Typically this error comes out of the page table walk code/TLB code. >>> >>> On Mon, Feb 13, 2012 at 11:58 AM, Mahmood Naderan >>> <[email protected]>wrote: >>> >>>> Hi, >>>> Can someone clarify what does "tried to read/write to unmapped >>>> address" exactly mean? >>>> >>>> How can I trace that error? How this error is produced? What are the >>>> possibilities? >>>> Is there a simple example (or code/assembly snippet) which shows this >>>> error? >>>> >>>> thanks >>>> -- >>>> // Naderan *Mahmood; >>>> _______________________________________________ >>>> gem5-users mailing list >>>> [email protected] >>>> http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users >>>> >>> >> >> >> -- >> -- >> // Naderan *Mahmood; >> _______________________________________________ >> gem5-users mailing list >> [email protected] >> http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users >> > _______________________________________________ > gem5-users mailing list > [email protected] > http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users > -- -- // Naderan *Mahmood; _______________________________________________ gem5-users mailing list [email protected] http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users
