On Wed, 11 Nov 2009, Tim Blechmann wrote: > i am curious, do the values of CONFIG_HZ and CONFIG_NO_HZ somehow affect the > scheduling latency (as reported by cyclictest) of a real-time/vanilla kernel, > especially when CONFIG_HIGH_RES_TIMERS is enabled? CONFIG_HZ should be pretty irrelevant, but CONFIG_NO_HZ=y especially when the CPU does support deeper C-States and the ACPI cpuidle support is active may influence it simply because the wake up from deeper c-states can take significantly longer than waking up from C1 (the default halt state). Note that the wakeup latency from C-States depends on the CPU model, chipset, available timer hardware ... Thanks, tglx -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
