From ab10ae902d8aa7c2b98fd080a7458127b1b8e648 Mon Sep 17 00:00:00 2001 From: Havoc Pennington Date: Sun, 11 May 2003 07:59:08 +0000 Subject: 2003-05-11 Havoc Pennington 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() --- ChangeLog | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) (limited to 'ChangeLog') diff --git a/ChangeLog b/ChangeLog index 43321cc0..cb74a1e0 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,33 @@ +2003-05-11 Havoc Pennington + + 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() + 2003-05-08 Havoc Pennington * dbus/dbus-spawn.c: s/_exit/exit/ because it was keeping gcov -- cgit