That does make sense. CowDiskImage is a copy on write disk image and is designed to be a layer on top of another disk image. Basically we use it to prevent writes from changing the original disk image by storing writes in the Cow layer, and passing reads that don't hit in the cow layer to the layer below. Generally people do use a CowDiskImage, so it is fine to only hack this one.
Nate On Sun, Apr 5, 2009 at 9:07 AM, Eddie Liu <[email protected]> wrote: > > In order to display the accessed data in disk,I want to add "DDUMP" in > the file src/dev/disk_image.cc. I assume I should add in the functions > of CowDiskImage::write(const uint8_t*data, off_t offset) and > CowDiskImage::read(const uint8_t*data, off_t offset). Does it make > sense? What about RawDiskImage::write(const uint8_t*data, off_t offset) > and RawDiskImage::read(const uint8_t*data, off_t offset)? What is the > difference between CowDiskImage and RawDiskImage? > Thanks a lot for your help. > > nathan binkert wrote: >> M5 does not support this, but you can easily edit the code to gather >> this type of information. Depending on what you want, you'd either >> want to look at modifying the disk controller device model or the disk >> image object. Both are in the src/dev directory. >> >> Nate >> >> On Thu, Apr 2, 2009 at 5:33 PM, Eddie Liu <[email protected]> wrote: >> >>> I want to record the trace the access to disk. During every access, I >>> hope M5 to display the data which is accessed. For example, if an read >>> access to disk, I want to know the data that would be read. For an write >>> access, the data before and after writing are wanted. Does M5 support >>> such operations? If not, can I make some modifications based on M5? >>> Thanks in advance. >>> >>> _______________________________________________ >>> m5-users mailing list >>> [email protected] >>> http://m5sim.org/cgi-bin/mailman/listinfo/m5-users >>> >>> >>> > _______________________________________________ > m5-users mailing list > [email protected] > http://m5sim.org/cgi-bin/mailman/listinfo/m5-users > > _______________________________________________ m5-users mailing list [email protected] http://m5sim.org/cgi-bin/mailman/listinfo/m5-users
