I wonder if it was meant to be "e->hits >>= 1;" - that would almost make sense
with the comment.
Tuesday, January 20, 2015, 10:00:40 PM, you wrote:
> Hi all,
> I have a question about the tick function of RamCacheCLFUS, the code is :
> ......
e->>hits <<= 1;
if (e->>hits) {
> e->hits = REQUEUE_HITS(e->hits);
> lru[1].enqueue(e);
> } else
> goto Lfree;
> ......
> I'm confused about the code, it doubles the hit number and then check if the
> number is zero or not. What's the usage of the doubling ??
> It seems the implementation is not the same as the introduction of history
> list
> (http://nottheoilrig.com/trafficserver/201408290/arch/cache/ram-cache.en.html),
> "Each CLOCK the least recently used entry in the History List is dequeued
> and if the "hits" field is not greater than 1 (it was hit at least once in
> the History or Cached List) it is deleted, otherwise the "hits" is set to
> zero and it is requeued on the History List."
> Am I missing something??
> Regards,
> Huawei Technologies, China
> Haojun Zhou
