RTEMS 4.6.2 On-Line Library

CVME961 Timing Data Context Switch

RTEMS Intel i960 Applications Supplement

10.4: Context Switch

The RTEMS processor context switch time is 1 microseconds on the Cyclone CVME961 benchmark platform. This time represents the raw context switch time with no user extensions configured. Additional execution time is required when a TSWITCH user extension is configured. The use of the TSWITCH extension is application dependent. Thus, its execution time is not considered part of the base context switch time.

The CVME961 has no hardware floating point capability and floating point tasks are not supported.

The following table summarizes the context switch times for the CVME961 benchmark platform:

No Floating Point Contexts	1
Floating Point Contexts
restore first FP task	2
save initialized, restore initialized	3
save idle, restore initialized	4
save idle, restore idle	5

RTEMS Intel i960 Applications Supplement