search for: poll_duration_n

...if (val > max) + val = max; + + return val; +} + +static unsigned int shrink_poll_ns(unsigned int old, unsigned int shrink) +{ + if (shrink == 0) + return 0; + + return old / shrink; +} + +static void kvm_idle_update_poll_duration(ktime_t idle) +{ + unsigned long poll_duration = this_cpu_read(poll_duration_ns); + + /* so far poll duration is based on nohz */ + if (idle == -1ULL) + return; + + if (poll_duration && idle > paravirt_poll_threshold_ns) + poll_duration = shrink_poll_ns(poll_duration, + paravirt_poll_shrink); + else if (poll_duration < paravirt_poll_threshold_ns &am...

...if (val > max) + val = max; + + return val; +} + +static unsigned int shrink_poll_ns(unsigned int old, unsigned int shrink) +{ + if (shrink == 0) + return 0; + + return old / shrink; +} + +static void kvm_idle_update_poll_duration(ktime_t idle) +{ + unsigned long poll_duration = this_cpu_read(poll_duration_ns); + + /* so far poll duration is based on nohz */ + if (idle == -1ULL) + return; + + if (poll_duration && idle > paravirt_poll_threshold_ns) + poll_duration = shrink_poll_ns(poll_duration, + paravirt_poll_shrink); + else if (poll_duration < paravirt_poll_threshold_ns &am...

From: Yang Zhang <yang.zhang.wz at gmail.com> Some latency-intensive workload have seen obviously performance drop when running inside VM. The main reason is that the overhead is amplified when running inside VM. The most cost I have seen is inside idle path. This patch introduces a new mechanism to poll for a while before entering idle state. If schedule is needed during poll, then we

From: Yang Zhang <yang.zhang.wz at gmail.com> Some latency-intensive workload have seen obviously performance drop when running inside VM. The main reason is that the overhead is amplified when running inside VM. The most cost I have seen is inside idle path. This patch introduces a new mechanism to poll for a while before entering idle state. If schedule is needed during poll, then we