Wu Zhangjin wrote:
If the processor support dynamic cpu frequency and the support is enabled in kernel, this sched_clock() implementation will be broken(and If the frequency of the MIPS CP0 counter is related to the cpu's frequency). So, some extra resitrictions should be added to it. arch/mips/Kconfig config CPU_HAS_FIXED_CP0_COUNTER bool config SYS_SUPPORTS_HRES_SCHED_CLOCK bool depends on CPU_HAS_FIXED_CP0_COUNTER || !CPU_FREQ arch/mips/kernel/csrc-r4k.c #ifdef SYS_SUPPORTS_HRES_SCHED_CLOCK /* The high resolution version of sched_clock() */ #endif And I'm not sure whether the cavium octeon support dynamic cpu frequency,
Not currently...
if yes, it's high resolution version of sched_clock() also should be wrapped with the above macro to ensure it is not broken: arch/mips/cavium-octeon/csrc-octeon.c
... So this is not applicable.
Regards, Wu Zhangjin
