Struct CpuShard

pub struct CpuShard(/* private fields */);

Determine the right sharding by cpu, and minimise the cost of hashing function of remainder calculation.

example:

use sync_utils::cpu::CpuShard;
let cpu_shard = CpuShard::new(Some(32));
let mut caches = Vec::with_capacity(cpu_shard.shards() as usize);
for _i in 0..caches.capacity() {
    caches = Cache::new();
    caches.push(cache);
}
let file_id = 111;
let shard_id = file_id & (caches.len() - 1 );
caches[shard_id].get(file_id);

Implementations

impl CpuShard

pub fn new(max_shard_limit: Option<u32>) -> Self

max_shard_limit: limit the maximum shard number when cpu_num is too large.

pub fn shards(&self) -> u32

return the shard number. ( shards() == 1<<shift() )

pub fn shift(&self) -> u32

return the shift ( shards() == 1<<shift() )