Thanks for the response. I had indeed looked into the options for compiling kernels for Gem5, and it seems the latest kernel that there are gem5 patches for is 2.6.27:
http://repo.gem5.org/linux-patches/file/0ab58d9bd9a5/stable I didn't try compiling a newer kernel without patches, but looking at the changes these patches make, they they are necessary. My question on the previous email was if anyone knows how many CPUs the pre-compiled 2.6.28.4 kernel at the parsec website was compiled for: http://www.cs.utexas.edu/~cart/parsec_m5/ I did try, however, to run more than 128 X86 CPUs with the latest gem5 stable version and I got a failed assertion somewhere in the X86 device. This probably means that X86 with more than 128 cores is not supported, right? Is that also true for syscall emulation? Thank you, George M ________________________________ From: Joel Hestness <[email protected]> To: George Michelogiannakis <[email protected]>; gem5 users mailing list <[email protected]> Sent: Friday, August 2, 2013 10:07 AM Subject: Re: [gem5-users] x86 kernels Hi George, I think you're looking for CONFIG_SMP and CONFIG_NR_CPUS. There are some details here: http://cateee.net/lkddb/web-lkddb/NR_CPUS.html. One thing to note is that sometimes the Linux kconfigs set range restrictions on the number of CPU cores. Sometimes these limitations are based on hardware restrictions, such as the design of interrupt devices, and other times they are soft limits that can be fudged for running in gem5 (I don't recall the details off-hand, but it involves modifying a range parameter in kconfigs - check out: https://www.kernel.org/doc/Documentation/kbuild/kconfig-language.txt). Hope this helps, Joel On Thu, Aug 1, 2013 at 6:51 PM, George Michelogiannakis <[email protected]> wrote: Hi all, > A quick question: I looked through the pre-compiled SMP kernel's config >file on the wiki, but I couldn't find the option for the maximum number of >CPUs it supports. Do you have that available? Also, Did anyone try compiling >the latest kernel (2.6.34) with this config file? > > >Thanks, > George M >_______________________________________________ >gem5-users mailing list >[email protected] >http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users > -- Joel Hestness PhD Student, Computer Architecture Dept. of Computer Science, University of Wisconsin - Madison http://pages.cs.wisc.edu/~hestness/
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