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Added a define to set the size threshold to enable the multi bulk parsing big objects optimization.

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This commit is contained in:
antirez 2011-11-04 11:16:11 +01:00
parent 826b5beb9c
commit 94d490b9f6
2 changed files with 14 additions and 8 deletions
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21
src/networking.c
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@ -767,8 +767,8 @@ int processMultibulkBuffer(redisClient *c) {
}
pos += newline-(c->querybuf+pos)+2;
#if 1
if (ll > 4096) {
#ifdef REDIS_MBULK_BIG_ARG
if (ll >= REDIS_MBULK_BIG_ARG) {
/* If we are going to read a large object from network
* try to make it likely that it will start at c->querybuf
* boundary so that we can optimized object creation
@ -776,10 +776,11 @@ int processMultibulkBuffer(redisClient *c) {
c->querybuf = sdsrange(c->querybuf,pos,-1);
pos = 0;
}
#endif
/* Hint the sds library about the amount of bytes this string is
* going to contain. */
if (ll > 4096) c->querybuf = sdsMakeRoomFor(c->querybuf,ll+2);
if (ll >= REDIS_MBULK_BIG_ARG)
c->querybuf = sdsMakeRoomFor(c->querybuf,ll+2);
#endif
c->bulklen = ll;
}
@ -791,8 +792,9 @@ int processMultibulkBuffer(redisClient *c) {
/* Optimization: if the buffer contanins JUST our bulk element
* instead of creating a new object by *copying* the sds we
* just use the current sds string. */
#ifdef REDIS_MBULK_BIG_ARG
if (pos == 0 &&
/* sdslen(c->querybuf) > 4096 && */
c->bulklen >= REDIS_MBULK_BIG_ARG &&
(signed) sdslen(c->querybuf) == c->bulklen+2)
{
// printf("HERE (arg %d)\n",c->argc);
@ -804,11 +806,14 @@ int processMultibulkBuffer(redisClient *c) {
c->querybuf = sdsMakeRoomFor(c->querybuf,c->bulklen+2);
pos = 0;
} else {
#endif
// printf("NOT HERE (arg %d) (pos %d)\n",c->argc, pos);
c->argv[c->argc++] =
createStringObject(c->querybuf+pos,c->bulklen);
pos += c->bulklen+2;
#ifdef REDIS_MBULK_BIG_ARG
}
#endif
c->bulklen = -1;
c->multibulklen--;
}
@ -871,21 +876,21 @@ void readQueryFromClient(aeEventLoop *el, int fd, void *privdata, int mask) {
REDIS_NOTUSED(mask);
readlen = REDIS_IOBUF_LEN;
#if REDIS_MBULK_BIG_ARG
/* If this is a multi bulk request, and we are processing a bulk reply
* that is large enough, try to maximize the probabilty that the query
* buffer contains excatly the SDS string representing the object, even
* at the risk of requring more read(2) calls. This way the function
* processMultiBulkBuffer() can avoid copying buffers to create the
* Redis Object representing the argument. */
#if 1
if (c->reqtype == REDIS_REQ_MULTIBULK && c->multibulklen && c->bulklen != -1
&& c->bulklen > 4096)
&& c->bulklen >= REDIS_MBULK_BIG_ARG)
{
int remaining = (unsigned)(c->bulklen+2)-sdslen(c->querybuf);
if (remaining < readlen) readlen = remaining;
}
#endif
#endif
qblen = sdslen(c->querybuf);
c->querybuf = sdsMakeRoomFor(c->querybuf, readlen);

1
src/redis.h
View File

@ -59,6 +59,7 @@
#define REDIS_REPL_TIMEOUT 60
#define REDIS_REPL_PING_SLAVE_PERIOD 10
#define REDIS_MBULK_BIG_ARG (1024*32)
/* Hash table parameters */
#define REDIS_HT_MINFILL 10 /* Minimal hash table fill 10% */