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easy_perform: use *multi_timeout() to get wait times

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... and trim the threaded Curl_resolver_getsock() to return zero
millisecond wait times during the first three milliseconds so that
localhost or names in the OS resolver cache gets detected and used
faster.

Closes #2685
This commit is contained in:
Daniel Stenberg 2018-06-26 18:11:32 +02:00
parent b0a365f8a0
commit 3ef67c6861
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GPG Key ID: 5CC908FDB71E12C2
2 changed files with 9 additions and 20 deletions
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6
lib/asyn-thread.c
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@ -574,10 +574,10 @@ int Curl_resolver_getsock(struct connectdata *conn,
(void)socks;
(void)numsocks;
ms = Curl_timediff(Curl_now(), reslv->start);
if(ms < 10)
milli = ms/3;
if(ms < 3)
milli = 0;
else if(ms <= 50)
milli = 10;
milli = ms/3;
else if(ms <= 250)
milli = 50;
else

23
lib/easy.c
View File

@ -661,38 +661,27 @@ static CURLcode easy_transfer(struct Curl_multi *multi)
bool done = FALSE;
CURLMcode mcode = CURLM_OK;
CURLcode result = CURLE_OK;
struct curltime before;
int without_fds = 0; /* count number of consecutive returns from
curl_multi_wait() without any filedescriptors */
while(!done && !mcode) {
int still_running = 0;
int rc;
before = Curl_now();
mcode = curl_multi_wait(multi, NULL, 0, 1000, &rc);
if(!mcode) {
if(!rc) {
struct curltime after = Curl_now();
long sleep_ms;
/* If it returns without any filedescriptor instantly, we need to
avoid busy-looping during periods where it has nothing particular
to wait for */
if(Curl_timediff(after, before) <= 10) {
without_fds++;
if(without_fds > 2) {
int sleep_ms = without_fds < 10 ? (1 << (without_fds - 1)) : 1000;
Curl_wait_ms(sleep_ms);
}
curl_multi_timeout(multi, &sleep_ms);
if(sleep_ms) {
if(sleep_ms > 1000)
sleep_ms = 1000;
Curl_wait_ms((int)sleep_ms);
}
else
/* it wasn't "instant", restart counter */
without_fds = 0;
}
else
/* got file descriptor, restart counter */
without_fds = 0;
mcode = curl_multi_perform(multi, &still_running);
}