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
