From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:37783) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XvlHV-0005by-V5 for qemu-devel@nongnu.org; Tue, 02 Dec 2014 06:06:16 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1XvlHP-0003j3-QB for qemu-devel@nongnu.org; Tue, 02 Dec 2014 06:06:09 -0500 Received: from mx1.redhat.com ([209.132.183.28]:46613) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XvlHP-0003ix-JW for qemu-devel@nongnu.org; Tue, 02 Dec 2014 06:06:03 -0500 From: Paolo Bonzini Date: Tue, 2 Dec 2014 12:05:43 +0100 Message-Id: <1417518350-6167-1-git-send-email-pbonzini@redhat.com> Subject: [Qemu-devel] [PATCH v2 0/7] coroutine: optimizations List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: kwolf@redhat.com, ming.lei@canonical.com, pl@kamp.de, stefanha@redhat.com As discussed in the other thread, this brings speedups from dropping the coroutine mutex (which serializes multiple iothreads, too) and using ELF thread-local storage. The speedup in perf/cost is about 50% (190->125). Windows port tested with tests/test-coroutine.exe under Wine. Paolo v1->v2: include the noinline attribute [many...] do not mention SwitchToFiber [Kevin] rename run_main_iothread_exit -> run_main_thread_exit leave personal opinions out of commit messages :) [Kevin] mention gain from patch 7 [Peter] change "alloc_pool_size +=" to "alloc_pool_size =" [Peter] Paolo Bonzini (7): coroutine-ucontext: use __thread qemu-thread: add per-thread atexit functions test-coroutine: avoid overflow on 32-bit systems QSLIST: add lock-free operations coroutine: rewrite pool to avoid mutex coroutine: drop qemu_coroutine_adjust_pool_size coroutine: try harder not to delete coroutines block/block-backend.c | 4 -- coroutine-ucontext.c | 64 +++++++--------------------- include/block/coroutine.h | 10 ----- include/qemu/queue.h | 15 ++++++- include/qemu/thread.h | 4 ++ qemu-coroutine.c | 104 ++++++++++++++++++++++------------------------ tests/test-coroutine.c | 2 +- util/qemu-thread-posix.c | 37 +++++++++++++++++ util/qemu-thread-win32.c | 48 ++++++++++++++++----- 9 files changed, 157 insertions(+), 131 deletions(-) -- 2.1.0