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Lazyfree: keep count of objects to free.

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antirez 2015-09-25 16:22:25 +02:00
parent c7b46a4719
commit b08c36c5f2
2 changed files with 11 additions and 3 deletions
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3
src/bio.c
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@ -84,6 +84,7 @@ struct bio_job {
}; };
void *bioProcessBackgroundJobs(void *arg); void *bioProcessBackgroundJobs(void *arg);
void lazyfreeFreeObjectFromBioThread(robj *o);
/* Make sure we have enough stack to perform all the things we do in the /* Make sure we have enough stack to perform all the things we do in the
* main thread. */ * main thread. */
@ -186,7 +187,7 @@ void *bioProcessBackgroundJobs(void *arg) {
} else if (type == BIO_AOF_FSYNC) { } else if (type == BIO_AOF_FSYNC) {
aof_fsync((long)job->arg1); aof_fsync((long)job->arg1);
} else if (type == BIO_LAZY_FREE) { } else if (type == BIO_LAZY_FREE) {
decrRefCount((robj*)job->arg1); lazyfreeFreeObjectFromBioThread(job->arg1);
} else { } else {
serverPanic("Wrong job type in bioProcessBackgroundJobs()."); serverPanic("Wrong job type in bioProcessBackgroundJobs().");
} }

11
src/lazyfree.c
View File

@ -1,10 +1,9 @@
#include "server.h" #include "server.h"
#include "bio.h" #include "bio.h"
#include "atomicvar.h"
static size_t lazyfree_objects = 0; static size_t lazyfree_objects = 0;
static size_t lazyfree_dbs = 0;
pthread_mutex_t lazyfree_objects_mutex = PTHREAD_MUTEX_INITIALIZER; pthread_mutex_t lazyfree_objects_mutex = PTHREAD_MUTEX_INITIALIZER;
pthread_mutex_t lazyfree_objects_dbs = PTHREAD_MUTEX_INITIALIZER;
/* Return the amount of work needed in order to free an object. /* Return the amount of work needed in order to free an object.
* The return value is not always the actual number of allocations the * The return value is not always the actual number of allocations the
@ -60,6 +59,7 @@ int dbAsyncDelete(redisDb *db, robj *key) {
/* If releasing the object is too much work, let's put it into the /* If releasing the object is too much work, let's put it into the
* lazy free list. */ * lazy free list. */
if (free_effort > LAZYFREE_THRESHOLD) { if (free_effort > LAZYFREE_THRESHOLD) {
atomicIncr(lazyfree_objects,1,&lazyfree_objects_mutex);
bioCreateBackgroundJob(BIO_LAZY_FREE,val,NULL,NULL); bioCreateBackgroundJob(BIO_LAZY_FREE,val,NULL,NULL);
dictSetVal(db->dict,de,NULL); dictSetVal(db->dict,de,NULL);
} }
@ -74,3 +74,10 @@ int dbAsyncDelete(redisDb *db, robj *key) {
return 0; return 0;
} }
} }
/* Implementation of function to release a single object called from the
* lazyfree thread from bio.c. */
void lazyfreeFreeObjectFromBioThread(robj *o) {
decrRefCount(o);
atomicDecr(lazyfree_objects,1,&lazyfree_objects_mutex);
}