On Tue, 2005-12-20 at 01:12 +0530, R Vamshi Krishna wrote: > Hello, > > I am using a Pentium IV as my target system and since the system is fast > enough, I want to see to how small can I make the "tick" time be and still > manage my applications. > > To that end can anyone tell how can I decrease the tick time (say in > micro-seconds range). > > Actually we have an application that runs on RTLinux. I want to see if we > can do that in eCos. RTlinux provides very small latencies (micro-seconds > range). Hence I want to check if eCos can also do that.
eCos can definitely provide micro-second event latencies. This is not related to how fast the clock runs though - a well designed system does not rely on a clock/timer to make things happen. > > RTLinux also has a small test that prints all the latencies. Is something > like that available for eCos. Look at CYGVAR_KERNEL_COUNTERS_CLOCK_LATENCY and CYGVAR_KERNEL_COUNTERS_CLOCK_DSR_LATENCY in the kernel package. These can be enabled and the 'tm_basic' program will use them, providing a simple measure of clock/timer ISR and DSR latencies. -- ------------------------------------------------------------ Gary Thomas | Consulting for the MLB Associates | Embedded world ------------------------------------------------------------ -- Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss
