From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:50932) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eqXzG-0004aW-8x for qemu-devel@nongnu.org; Tue, 27 Feb 2018 00:39:40 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eqXzC-0000PZ-9h for qemu-devel@nongnu.org; Tue, 27 Feb 2018 00:39:38 -0500 Received: from out2-smtp.messagingengine.com ([66.111.4.26]:35265) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eqXzC-0000NJ-13 for qemu-devel@nongnu.org; Tue, 27 Feb 2018 00:39:34 -0500 From: "Emilio G. Cota" Date: Tue, 27 Feb 2018 00:39:09 -0500 Message-Id: <1519709965-29833-1-git-send-email-cota@braap.org> Subject: [Qemu-devel] [PATCH 00/16] tcg: tb_lock removal redux v1 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Richard Henderson , Paolo Bonzini With this set we finally remove tb_lock. The performance gains when booting a guest are compelling at low core counts. However, beyond 8 cores performance doesn't improve due to unrelated contention--see results in the last patch of the series ("tcg: remove tb_lock"). I have another series that greatly reduces this other contention by using per-CPU locks instead of the BQL to keep track of a subset of CPUState. But that series is pretty large so let's deal with this first. You can fetch the patches from: https://github.com/cota/qemu/tree/tb-lock-removal-redux-v1 Thanks, Emilio