maxmustermann/dogecoin
1
0
Fork 0
Code Issues Pull requests Projects Releases Wiki Activity

util: Work around (virtual) memory exhaustion on 32-bit w/ glibc

Browse source 
glibc-specific: On 32-bit systems set the number of arenas to 1. By
default, since glibc 2.10, the C library will create up to two heap
arenas per core. This is known to cause excessive virtual address space
usage in our usage. Work around it by setting the maximum number of
arenas to 1.

Github-Pull: #10120
Rebased-From: 625488ace5
This commit is contained in:
Wladimir J. van der Laan 2017-03-30 09:37:47 +02:00
parent f59e3dfc59
commit e4c9a90fe9
No known key found for this signature in database
GPG key ID: 74810B012346C9A6
2 changed files with 22 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

8
configure.ac
View file

@ -557,6 +557,14 @@ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/socket.h>]],
[ AC_MSG_RESULT(no)]
)
dnl Check for mallopt(M_ARENA_MAX) (to set glibc arenas)
AC_MSG_CHECKING(for mallopt M_ARENA_MAX)
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <malloc.h>]],
[[ mallopt(M_ARENA_MAX, 1); ]])],
[ AC_MSG_RESULT(yes); AC_DEFINE(HAVE_MALLOPT_ARENA_MAX, 1,[Define this symbol if you have mallopt with M_ARENA_MAX]) ],
[ AC_MSG_RESULT(no)]
)
AC_MSG_CHECKING([for visibility attribute])
AC_LINK_IFELSE([AC_LANG_SOURCE([
int foo_def( void ) __attribute__((visibility("default")));

14
src/util.cpp
View file

@ -72,6 +72,10 @@
#include <sys/prctl.h>
#endif
#ifdef HAVE_MALLOPT_ARENA_MAX
#include <malloc.h>
#endif
#include <boost/algorithm/string/case_conv.hpp> // for to_lower()
#include <boost/algorithm/string/join.hpp>
#include <boost/algorithm/string/predicate.hpp> // for startswith() and endswith()
@ -792,6 +796,16 @@ void RenameThread(const char* name)
void SetupEnvironment()
{
#ifdef HAVE_MALLOPT_ARENA_MAX
// glibc-specific: On 32-bit systems set the number of arenas to 1.
// By default, since glibc 2.10, the C library will create up to two heap
// arenas per core. This is known to cause excessive virtual address space
// usage in our usage. Work around it by setting the maximum number of
// arenas to 1.
if (sizeof(void*) == 4) {
mallopt(M_ARENA_MAX, 1);
}
#endif
// On most POSIX systems (e.g. Linux, but not BSD) the environment's locale
// may be invalid, in which case the "C" locale is used as fallback.
#if !defined(WIN32) && !defined(MAC_OSX) && !defined(__FreeBSD__) && !defined(__OpenBSD__)