diff options
| author | Havoc Pennington <hp@redhat.com> | 2003-05-11 07:59:08 +0000 |
|---|---|---|
| committer | Havoc Pennington <hp@redhat.com> | 2003-05-11 07:59:08 +0000 |
| commit | ab10ae902d8aa7c2b98fd080a7458127b1b8e648 (patch) | |
| tree | b566d610ee13aa1a4ab9013eb7d19eb3dd7ad1c8 /configure.in | |
| parent | 27b694f6e109c78c633ddb8d96f524e46e536f4e (diff) | |
2003-05-11 Havoc Pennington <hp@pobox.com>
Write a "test-profile" that does echo client-server with threads;
profile reveals lock contention, memcpy/realloc of buffers, and
UTF-8 validation as hot spots. 20% of lock contention eliminated
with dbus_atomic_inc/dec implementation on x86. Much remaining
contention is global mempool locks for GList and DBusList.
* dbus/dbus-sysdeps.c (_dbus_atomic_inc, _dbus_atomic_dec): add
x86 implementation
* dbus/dbus-connection.c (struct DBusConnection): use
dbus_atomic_t for the reference count
* dbus/dbus-message.c (struct DBusMessage): declare
dbus_atomic_t values as volatile
* configure.in: code to detect ability to use atomic integer
operations in assembly, from GLib patch
* dbus/dbus-internals.c (_dbus_verbose_real): call getpid every
time, tired of it being wrong in threads and forked processes
* glib/test-profile.c: a little program to bounce messages back
and forth between threads and eat CPU
* dbus/dbus-connection.c: add debug spew macros for debugging
thread locks; include config.h at top; fix deadlock in
dbus_connection_flush()
Diffstat (limited to 'configure.in')
| -rw-r--r-- | configure.in | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/configure.in b/configure.in index 18cb519e..f95da565 100644 --- a/configure.in +++ b/configure.in @@ -205,6 +205,28 @@ AC_SUBST(DBUS_HAVE_INT64) ## byte order AC_C_BIGENDIAN +#### Atomic integers (checks by Sebastian Wilhelmi for GLib) +AC_MSG_CHECKING([whether to use inline assembler routines for atomic integers]) +have_atomic_inc=no +if test x"$GCC" = xyes; then + case $host_cpu in + i386) + AC_MSG_RESULT([no]) + ;; + i?86) + AC_MSG_RESULT([i486]) + AC_DEFINE_UNQUOTED(DBUS_USE_ATOMIC_INT_486, 1, [Use atomic integer implementation for 486]) + have_atomic_inc=yes + ;; + *) + AC_MSG_RESULT([no]) + ;; + esac +fi +if test x$have_atomic_inc = xyes ; then + AC_DEFINE_UNQUOTED(DBUS_HAVE_ATOMIC_INT, 1, [Some atomic integer implementation present]) +fi + #### Various functions AC_CHECK_LIB(socket,socket) AC_CHECK_LIB(nsl,gethostbyname) @@ -598,6 +620,7 @@ else TEST_SOCKET_DIR=$DEFAULT_SOCKET_DIR fi AC_SUBST(TEST_SOCKET_DIR) +AC_DEFINE_UNQUOTED(DBUS_TEST_SOCKET_DIR, "$TEST_SOCKET_DIR", [Where to put test sockets]) if ! test -z "$with_session_socket_dir" ; then DBUS_SESSION_SOCKET_DIR="$with_session_socket_dir" |