> -----Original Message----- > From: openocd-development-boun...@lists.berlios.de [mailto:openocd- > development-boun...@lists.berlios.de] On Behalf Of Gene Smith > Sent: woensdag 17 maart 2010 3:50 > To: openocd-development@lists.berlios.de > Subject: [Openocd-development] usb speed with fedora 12 slowed down > > I have been using openocd on an older fedora 8 machine and get OK speeds > and responsiveness. Insight debugger indicates a download speed of 11 > Kbps when programming to flash (64k). Stepping is reasonably quick even > with watch and/or memory windows open. > > However, I have needed to use the same versions of openocd and Insight > on another machine running fedora 12 and it seems noticeably slower even > though the processor is faster and it has more memory. The download > speed is about 4 Kbps and stepping is very slow and almost painful if > there are any watch or memory windows to update between steps. Also, > opening the same size watch window (e.g., var with 256 array elements) > seems to take quite a bit longer. > > In other respects the new machine is quite a bit faster, such as general > responsiveness and time to compile programs. The new machine claims to > have usb 2.0 ports. I should also mention that the new machine is 64bit > while the old machine is 32bit. Openocd is compiled for 32bit. > > In both cases I am using the olimex-arm-usb-ocd device and using libusb > and libftdi. > > I was wondering if anyone can suggest a way to troubleshoot or benchmark > the usb ports on this machine to find out why they are slower than the > old machine when running openocd.
Gene, The first thing to look for is the CPU load during the transfer. This will tell you whether OpenOCD is busy or the machine is waiting for some hardware event. Nico Coesel _______________________________________________ Openocd-development mailing list Openocd-development@lists.berlios.de https://lists.berlios.de/mailman/listinfo/openocd-development
