From mboxrd@z Thu Jan 1 00:00:00 1970 From: Prashanth Prakash Subject: [PATCH V3 0/4] acpi: cppc optimization patches Date: Wed, 10 Feb 2016 13:05:58 -0700 Message-ID: <1455134762-31400-1-git-send-email-pprakash@codeaurora.org> Return-path: Received: from smtp.codeaurora.org ([198.145.29.96]:44161 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752817AbcBJUGM (ORCPT ); Wed, 10 Feb 2016 15:06:12 -0500 Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: rjw@rjwysocki.net Cc: linux-acpi@vger.kernel.org, linaro-acpi@lists.linaro.org, ashwin.chaugule@linaro.org, alexey.klimov@arm.com, timur@codeaurora.org, Prashanth Prakash Changes in V3: Addressed the review comments from Alexey, Ashwin and Timur Changes in V2: Fixed compilation error on i386 This series introduces changes to reduce the time required to send a frequency transition requests to the platform while using the cppc-cpufreq driver. With these changes we see significant improvement in the average time to send freq. transition request to the platform. Profiling on an ARM platform showed that the average transaction time per request reduced from 200us to under 20us. Ashwin Chaugule (1): ACPI / CPPC: Optimize PCC Read Write operations Prashanth Prakash (3): acpi: cppc: optimized cpc_read and cpc_write mailbox: pcc: optimized pcc_send_data acpi: cppc: replace writeX/readX to PCC with relaxed version drivers/acpi/cppc_acpi.c | 183 +++++++++++++++++++++++++++++++++++------------ drivers/mailbox/pcc.c | 111 ++++++++++++++++++++++++++-- 2 files changed, 241 insertions(+), 53 deletions(-) -- Qualcomm Technologies, Inc. on behalf of the Qualcomm Innovation Center, Inc. The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project.