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Code Issues Releases Wiki Activity

Work around the 1024 connection limit in select(), or rather in the FD_*

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macros.
This commit is contained in:
Daniel Stenberg 2005-12-09 10:41:07 +00:00
parent 7d044d14f9
commit 50ec78b488
1 changed files with 38 additions and 18 deletions
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56
hiper/hiper.c
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@ -18,9 +18,6 @@
/* The maximum number of simultanoues connections/transfers we support */
#define NCONNECTIONS 50000
#define __FD_SETSIZE NCONNECTIONS
#define FD_SETSIZE NCONNECTIONS
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
@ -34,7 +31,7 @@
#define MICROSEC 1000000 /* number of microseconds in one second */
/* The maximum time (in microseconds) we run the test */
#define RUN_FOR_THIS_LONG (10*MICROSEC)
#define RUN_FOR_THIS_LONG (20*MICROSEC)
/* Number of loops (seconds) we allow the total download amount and alive
connections to remain the same until we bail out. Set this slightly higher
@ -210,6 +207,13 @@ static void report(void)
#endif
}
struct ourfdset {
char fdbuffer[NCONNECTIONS/8];
};
#define FD2_ZERO(x) FD_ZERO((fd_set *)x)
typedef struct ourfdset fd2_set;
int main(int argc, char **argv)
{
CURLM *multi_handle;
@ -222,9 +226,14 @@ int main(int argc, char **argv)
int prevalive=-1;
int prevsamecounter=0;
int prevtotal = -1;
fd2_set fdsizecheck;
int selectmaxamount;
memset(&info, 0, sizeof(struct globalinfo));
selectmaxamount = sizeof(fdsizecheck) * 8;
printf("select() supports max %d connections\n", selectmaxamount);
if(argc < 3) {
printf("Usage: hiper [num idle] [num active]\n");
return 1;
@ -235,6 +244,11 @@ int main(int argc, char **argv)
num_total = num_idle + num_active;
if(num_total > selectmaxamount) {
printf("Requested more connections than supported!\n");
return 4;
}
conns = calloc(num_total, sizeof(struct connection));
if(!conns) {
printf("Out of memory\n");
@ -284,7 +298,10 @@ int main(int argc, char **argv)
curl_easy_setopt(e, CURLOPT_PRIVATE, &conns[i]);
/* add the easy to the multi */
curl_multi_add_handle(multi_handle, e);
if(CURLM_OK != curl_multi_add_handle(multi_handle, e)) {
printf("curl_multi_add_handle() returned error for %d\n", i);
return 3;
}
}
/* we start some action by calling perform right away */
@ -298,27 +315,32 @@ int main(int argc, char **argv)
struct timeval timeout;
int rc; /* select() return code */
fd_set fdread;
fd_set fdwrite;
fd_set fdexcep;
fd2_set fdread;
fd2_set fdwrite;
fd2_set fdexcep;
int maxfd;
FD_ZERO(&fdread);
FD_ZERO(&fdwrite);
FD_ZERO(&fdexcep);
FD2_ZERO(&fdread);
FD2_ZERO(&fdwrite);
FD2_ZERO(&fdexcep);
/* set a suitable timeout to play around with */
timeout.tv_sec = 0;
timeout.tv_usec = 50000;
/* get file descriptors from the transfers */
curl_multi_fdset(multi_handle, &fdread, &fdwrite, &fdexcep, &maxfd);
printf("maxfd: %d\n", maxfd);
curl_multi_fdset(multi_handle,
(fd_set *)&fdread,
(fd_set *)&fdwrite,
(fd_set *)&fdexcep, &maxfd);
timer_pause();
selects++;
selectsalive += still_running;
rc = select(maxfd+1, &fdread, &fdwrite, &fdexcep, &timeout);
rc = select(maxfd+1,
(fd_set *)&fdread,
(fd_set *)&fdwrite,
(fd_set *)&fdexcep, &timeout);
#if 0
/* Output this here to make it outside the timer */
@ -366,11 +388,9 @@ int main(int argc, char **argv)
struct connection *cptr;
while ((msg = curl_multi_info_read(multi_handle, &msgs_left))) {
if (msg->msg == CURLMSG_DONE) {
printf("Handle %p returned %d\n", msg->easy_handle, msg->data.result);
curl_easy_getinfo(msg->easy_handle, CURLINFO_PRIVATE, &cptr);
printf(" Error message: %s\n", cptr->error);
printf("%d => (%d) %s", cptr->id, msg->data.result, cptr->error);
}
}
@ -379,7 +399,7 @@ int main(int argc, char **argv)
curl_multi_cleanup(multi_handle);
/* cleanup all the easy handles */
for(i=0; i< NCONNECTIONS; i++)
for(i=0; i< num_total; i++)
curl_easy_cleanup(conns[i].e);
report();