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Reduce default maximum number of sockets by 1 so there is room for the reaper socket.

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This commit is contained in:
Richard Newton 2013-11-11 13:41:42 +00:00 committed by Pieter Hintjens
parent 737b6afc97
commit 0855c28069
2 changed files with 70 additions and 21 deletions
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2
include/zmq.h
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@ -185,7 +185,7 @@ ZMQ_EXPORT const char *zmq_strerror (int errnum);
/* Default for new contexts */
#define ZMQ_IO_THREADS_DFLT 1
#define ZMQ_MAX_SOCKETS_DFLT 1024
#define ZMQ_MAX_SOCKETS_DFLT 1023
ZMQ_EXPORT void *zmq_ctx_new (void);
ZMQ_EXPORT int zmq_ctx_term (void *context);

89
tests/test_many_sockets.cpp
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@ -21,32 +21,81 @@
#include <zmq.h>
#include <stdio.h>
#include <stdlib.h>
#include <vector>
const int no_of_sockets = 2 * 65536;
void test_system_max ()
{
// Keep allocating sockets until we run out of system resources
const int no_of_sockets = 2 * 65536;
void *ctx = zmq_ctx_new();
zmq_ctx_set(ctx, ZMQ_MAX_SOCKETS, no_of_sockets);
std::vector<void*> sockets;
while (true)
{
void *socket = zmq_socket(ctx, ZMQ_PAIR);
if (!socket)
break;
sockets.push_back(socket);
}
assert(sockets.size() < no_of_sockets);
// System is out of resources, further calls to zmq_socket should return NULL.
for (unsigned int i = 0; i < 10; ++i)
{
void *socket = zmq_socket(ctx, ZMQ_PAIR);
assert(socket == NULL);
}
// Clean up.
for (unsigned int i = 0; i < sockets.size(); ++i)
zmq_close(sockets[i]);
zmq_ctx_destroy(ctx);
}
void test_zmq_default_max ()
{
// Keep allocating sockets until we hit the default zeromq limit
void *ctx = zmq_ctx_new();
std::vector<void*> sockets;
while (true)
{
void *socket = zmq_socket(ctx, ZMQ_PAIR);
if (!socket)
break;
sockets.push_back(socket);
}
assert(sockets.size() == ZMQ_MAX_SOCKETS_DFLT);
// At zeromq max, further calls to zmq_socket should return NULL.
for (unsigned int i = 0; i < 10; ++i)
{
void *socket = zmq_socket(ctx, ZMQ_PAIR);
assert(socket == NULL);
}
// Clean up.
for (unsigned int i = 0; i < sockets.size(); ++i)
zmq_close(sockets[i]);
zmq_ctx_destroy(ctx);
}
int main(void)
{
setup_test_environment();
void *ctx = zmq_ctx_new();
zmq_ctx_set(ctx, ZMQ_MAX_SOCKETS, no_of_sockets);
void *sockets[no_of_sockets];
int sockets_created = 0;
test_system_max ();
test_zmq_default_max ();
for ( int i = 0; i < no_of_sockets; ++i )
{
sockets[i] = zmq_socket(ctx, ZMQ_PAIR);
if (sockets[i])
++sockets_created;
}
assert(sockets_created < no_of_sockets);
for ( int i = 0; i < no_of_sockets; ++i )
if (sockets[i])
zmq_close (sockets[i]);
zmq_ctx_destroy (ctx);
return 0;
}