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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 */ /* The maximum number of simultanoues connections/transfers we support */
#define NCONNECTIONS 50000 #define NCONNECTIONS 50000
#define __FD_SETSIZE NCONNECTIONS
#define FD_SETSIZE NCONNECTIONS
#include <stdio.h> #include <stdio.h>
#include <string.h> #include <string.h>
#include <stdlib.h> #include <stdlib.h>
@ -34,7 +31,7 @@
#define MICROSEC 1000000 /* number of microseconds in one second */ #define MICROSEC 1000000 /* number of microseconds in one second */
/* The maximum time (in microseconds) we run the test */ /* 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 /* 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 connections to remain the same until we bail out. Set this slightly higher
@ -210,6 +207,13 @@ static void report(void)
#endif #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) int main(int argc, char **argv)
{ {
CURLM *multi_handle; CURLM *multi_handle;
@ -222,9 +226,14 @@ int main(int argc, char **argv)
int prevalive=-1; int prevalive=-1;
int prevsamecounter=0; int prevsamecounter=0;
int prevtotal = -1; int prevtotal = -1;
fd2_set fdsizecheck;
int selectmaxamount;
memset(&info, 0, sizeof(struct globalinfo)); memset(&info, 0, sizeof(struct globalinfo));
selectmaxamount = sizeof(fdsizecheck) * 8;
printf("select() supports max %d connections\n", selectmaxamount);
if(argc < 3) { if(argc < 3) {
printf("Usage: hiper [num idle] [num active]\n"); printf("Usage: hiper [num idle] [num active]\n");
return 1; return 1;
@ -235,6 +244,11 @@ int main(int argc, char **argv)
num_total = num_idle + num_active; 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)); conns = calloc(num_total, sizeof(struct connection));
if(!conns) { if(!conns) {
printf("Out of memory\n"); printf("Out of memory\n");
@ -284,7 +298,10 @@ int main(int argc, char **argv)
curl_easy_setopt(e, CURLOPT_PRIVATE, &conns[i]); curl_easy_setopt(e, CURLOPT_PRIVATE, &conns[i]);
/* add the easy to the multi */ /* 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 */ /* we start some action by calling perform right away */
@ -298,27 +315,32 @@ int main(int argc, char **argv)
struct timeval timeout; struct timeval timeout;
int rc; /* select() return code */ int rc; /* select() return code */
fd_set fdread; fd2_set fdread;
fd_set fdwrite; fd2_set fdwrite;
fd_set fdexcep; fd2_set fdexcep;
int maxfd; int maxfd;
FD_ZERO(&fdread); FD2_ZERO(&fdread);
FD_ZERO(&fdwrite); FD2_ZERO(&fdwrite);
FD_ZERO(&fdexcep); FD2_ZERO(&fdexcep);
/* set a suitable timeout to play around with */ /* set a suitable timeout to play around with */
timeout.tv_sec = 0; timeout.tv_sec = 0;
timeout.tv_usec = 50000; timeout.tv_usec = 50000;
/* get file descriptors from the transfers */ /* get file descriptors from the transfers */
curl_multi_fdset(multi_handle, &fdread, &fdwrite, &fdexcep, &maxfd); curl_multi_fdset(multi_handle,
printf("maxfd: %d\n", maxfd); (fd_set *)&fdread,
(fd_set *)&fdwrite,
(fd_set *)&fdexcep, &maxfd);
timer_pause(); timer_pause();
selects++; selects++;
selectsalive += still_running; 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 #if 0
/* Output this here to make it outside the timer */ /* Output this here to make it outside the timer */
@ -366,11 +388,9 @@ int main(int argc, char **argv)
struct connection *cptr; struct connection *cptr;
while ((msg = curl_multi_info_read(multi_handle, &msgs_left))) { while ((msg = curl_multi_info_read(multi_handle, &msgs_left))) {
if (msg->msg == CURLMSG_DONE) { 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); 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); curl_multi_cleanup(multi_handle);
/* cleanup all the easy handles */ /* cleanup all the easy handles */
for(i=0; i< NCONNECTIONS; i++) for(i=0; i< num_total; i++)
curl_easy_cleanup(conns[i].e); curl_easy_cleanup(conns[i].e);
report(); report();