Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753529Ab3FJRRT (ORCPT ); Mon, 10 Jun 2013 13:17:19 -0400 Received: from mail-bk0-f47.google.com ([209.85.214.47]:63654 "EHLO mail-bk0-f47.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751999Ab3FJRRR (ORCPT ); Mon, 10 Jun 2013 13:17:17 -0400 From: Manfred Spraul To: Andrew Morton Cc: LKML , Rik van Riel , Davidlohr Bueso , hhuang@redhat.com, Linus Torvalds , Mike Galbraith , Manfred Spraul Subject: [PATCH 0/6] ipc/sem.c: performance improvements, FIFO Date: Mon, 10 Jun 2013 19:16:45 +0200 Message-Id: <1370884611-3861-1-git-send-email-manfred@colorfullife.com> X-Mailer: git-send-email 1.8.1.4 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 982 Lines: 28 Hi Andrew, I have cleaned up/improved my updates to sysv sem. Could you replace my patches in -akpm with this series? - 1: cacheline align output from ipc_rcu_alloc - 2: cacheline align semaphore structures - 3: seperate-wait-for-zero-and-alter-tasks - 4: Always-use-only-one-queue-for-alter-operations - 5: Replace the global sem_otime with a distributed otime - 6: Rename-try_atomic_semop-to-perform_atomic The first 2 patches result up to a ~30% performance improvement on a 2-core i3. 3,4 remove unnecessary loops in do_smart_update() and restore FIFO behavior. I would expect that the 5th one will cause an improvement for multi-socket systems, but I don't have a test setup. 6 is just a cleanup/function rename. -- Manfred -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/