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Threaded lazyfree WIP #1.

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antirez
2015-09-23 16:46:36 +02:00
parent 4d50d691e3
commit 9253d85073
5 changed files with 36 additions and 8 deletions
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26
src/lazyfree.c
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@ -1,4 +1,7 @@
#include "server.h"
#include "bio.h"
static int lazyfree_threaded = 1; /* Use a thread to reclaim objects. */
/* Initialization of the lazy free engine. Must be called only once at server
* startup. */
@ -97,7 +100,17 @@ size_t lazyfreeFastStep(void) {
/* Handles slow or fast collection steps. */
size_t lazyfreeStep(int type) {
if (type == LAZYFREE_STEP_FAST) return lazyfreeFastStep();
/* Threaded implementaiton: only block for STEP_OOM. */
if (lazyfree_threaded) {
if (type == LAZYFREE_STEP_OOM)
return bioWaitStepOfType(BIO_LAZY_FREE);
return 0;
}
/* Non threaded implementation: free things incrementally avoiding
* to block. */
if (type == LAZYFREE_STEP_FAST ||
type == LAZYFREE_STEP_OOM) return lazyfreeFastStep();
size_t totalwork = 0;
mstime_t end = mstime()+2;
@ -130,8 +143,12 @@ int dbAsyncDelete(redisDb *db, robj *key) {
/* If releasing the object is too much work, let's put it into the
* lazy free list. */
if (free_effort > LAZYFREE_THRESHOLD) {
listAddNodeTail(server.lazyfree_obj,val);
server.lazyfree_elements += free_effort;
if (lazyfree_threaded) {
bioCreateBackgroundJob(BIO_LAZY_FREE,val,NULL,NULL);
} else {
listAddNodeTail(server.lazyfree_obj,val);
server.lazyfree_elements += free_effort;
}
dictSetVal(db->dict,de,NULL);
}
}
@ -165,6 +182,9 @@ int lazyfreeCron(struct aeEventLoop *eventLoop, long long id, void *clientData)
UNUSED(id);
UNUSED(clientData);
/* Threaded lazy free does not need a timer, unregister the timer event. */
if (lazyfree_threaded) return AE_NOMORE;
static size_t prev_mem;
static int timer_period = 1000; /* Defauls to 1HZ */
static double mem_trend = 0;