On Mon, 10 Oct 2011, Chris Young wrote: > (I'm not sure if the fact I emulate an ARM3 makes any difference > to the clock frequency report - if I try to emulate an ARM2 my > !Boot hangs or errors)
I've just checked and it doesn't look like the choice of CPU has any effect on the speed reported by !SICK. > Looking through my old logs, the previous version reported 20MHz. > Maybe it was processing data quicker previously but it certainly > didn't feel as fast! No, the previous versions of ArcEm were just lying to you :( !SICK uses the IOC timers (or perhaps the audio/video IRQs?) to measure the system speed. But until this recent batch of changes those timers/clocks weren't adjusted to run in real time - they just ran at a fixed rate of X ticks per Y emulated CPU cycles. So no matter what host system you were using, !SICK would always report the same performance figures. I've managed to make some progress with the 256K/512K/1M memory configurations. 512K & 1M are now working, but 256K causes a hang on boot on all the OS versions I've tried. I was able to find the RAM detection routine in the ROM image (with a little help from the ROOL sources), and can confirm that the OS is detecting 256K of RAM, but then it all goes horribly wrong sometime after it starts to set up the page tables. So even though code exists to detect the configuration, I suspect it simply isn't supported by the OS. Wikipedia certainly doesn't list any machines that had 256K of RAM. Once I've tweaked the hostfs code I'll upload a new version for people to try out. Cheers, - Jeffrey ------------------------------------------------------------------------------ All the data continuously generated in your IT infrastructure contains a definitive record of customers, application performance, security threats, fraudulent activity and more. Splunk takes this data and makes sense of it. Business sense. IT sense. Common sense. http://p.sf.net/sfu/splunk-d2d-oct -- arcem-devel mailing list arcem-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/arcem-devel
