From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755198AbdESAhW (ORCPT ); Thu, 18 May 2017 20:37:22 -0400 Received: from userp1040.oracle.com ([156.151.31.81]:46438 "EHLO userp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755025AbdESAhQ (ORCPT ); Thu, 18 May 2017 20:37:16 -0400 From: Babu Moger To: davem@davemloft.net, peterz@infradead.org, mingo@redhat.com, arnd@arndb.de Cc: babu.moger@oracle.com, shannon.nelson@oracle.com, haakon.bugge@oracle.com, steven.sistare@oracle.com, vijay.ac.kumar@oracle.com, jane.chu@oracle.com, sparclinux@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org Subject: [PATCH 0/6] Enable queued rwlock and queued spinlock for SPARC Date: Thu, 18 May 2017 18:36:04 -0600 Message-Id: <1495154170-854693-1-git-send-email-babu.moger@oracle.com> X-Mailer: git-send-email 1.7.1 X-Source-IP: aserv0022.oracle.com [141.146.126.234] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This series of patches enables queued rwlock and queued spinlock support for SPARC. These features were introduced some time ago in upstream. Here are some of the earlier discussions. https://lwn.net/Articles/572765/ https://lwn.net/Articles/582200/ https://lwn.net/Articles/561775/ https://lwn.net/Articles/590243/ Tests: Ran AIM7 benchmark to verify the performance on various workloads. https://github.com/davidlohr/areaim. Same benchmark was used when this feature was introduced and enabled on x86. Here are the test results. Kernel 4.11.0-rc6 4.11.0-rc6 + Change baseline queued locks (Avg No.of jobs) (Avg No.of jobs) Workload High systime 10-100 user 17290.48 17295.18 +0.02 High systime 200-1000 users 109814.95 110248.87 +0.39 High systime 1200-2000 users 107912.40 127923.16 +18.54 Disk IO 10-100 users 168910.16 158834.17 -5.96 Disk IO 200-1000 users 242781.74 281285.80 +15.85 Disk IO 1200-2000 users 228518.23 218421.23 -4.41 Disk IO 10-100 users 183933.77 207928.67 +13.04 Disk IO 200-1000 users 491981.56 500162.33 +1.66 Disk IO 1200-2000 users 463395.66 467312.70 +0.84 fserver 10-100 users 254177.53 270283.08 +6.33 fserver IO 200-1000 users 269017.35 324812.2 +20.74 fserver IO 1200-2000 users 229538.87 284713.77 +24.03 Disk I/O results are little bit in negative territory. But majority of the performance changes are in positive and it is significant in some cases. Babu Moger (6): kernel/locking: Fix compile error with qrwlock.c arch/sparc: Define config parameter CPU_BIG_ENDIAN arch/sparc: Introduce cmpxchg_u8 SPARC arch/sparc: Enable queued rwlocks for SPARC arch/sparc: Introduce xchg16 for SPARC arch/sparc: Enable queued spinlock support for SPARC arch/sparc/Kconfig | 6 +++ arch/sparc/include/asm/cmpxchg_64.h | 76 +++++++++++++++++++++++++++---- arch/sparc/include/asm/qrwlock.h | 7 +++ arch/sparc/include/asm/qspinlock.h | 7 +++ arch/sparc/include/asm/spinlock_64.h | 13 ++++- arch/sparc/include/asm/spinlock_types.h | 10 ++++- include/asm-generic/qrwlock_types.h | 6 +- kernel/locking/qrwlock.c | 1 + 8 files changed, 110 insertions(+), 16 deletions(-) create mode 100644 arch/sparc/include/asm/qrwlock.h create mode 100644 arch/sparc/include/asm/qspinlock.h