From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thomas Monjalon Subject: [PATCH 3/4] eal/ppc64: implement arch-specific TSC freq query Date: Fri, 13 Oct 2017 02:02:46 +0200 Message-ID: <20171013000247.4158-4-thomas@monjalon.net> References: <20171013000247.4158-1-thomas@monjalon.net> Cc: dev@dpdk.org To: gowrishankar.m@linux.vnet.ibm.com, jerin.jacob@caviumnetworks.com, jianbo.liu@linaro.org, sergio.gonzalez.monroy@intel.com, bruce.richardson@intel.com Return-path: Received: from out2-smtp.messagingengine.com (out2-smtp.messagingengine.com [66.111.4.26]) by dpdk.org (Postfix) with ESMTP id 4FDCB1B3AD for ; Fri, 13 Oct 2017 02:02:56 +0200 (CEST) In-Reply-To: <20171013000247.4158-1-thomas@monjalon.net> List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" From: Jerin Jacob In ppc_64, rte_rdtsc() returns timebase register value which increments at independent timebase frequency and hence not related to lcore cpu frequency to derive TSC hz. Hence, we stick with master lcore frequency. Signed-off-by: Jerin Jacob Signed-off-by: Gowrishankar Muthukrishnan --- lib/librte_eal/common/arch/ppc_64/rte_cycles.c | 47 +++++++++++++++++++++++++- 1 file changed, 46 insertions(+), 1 deletion(-) diff --git a/lib/librte_eal/common/arch/ppc_64/rte_cycles.c b/lib/librte_eal/common/arch/ppc_64/rte_cycles.c index 851fd0255..69a9f7475 100644 --- a/lib/librte_eal/common/arch/ppc_64/rte_cycles.c +++ b/lib/librte_eal/common/arch/ppc_64/rte_cycles.c @@ -1,7 +1,52 @@ +/* + * BSD LICENSE + * + * Copyright (C) IBM Corporation 2014. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of IBM Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include +#include +#include "eal_filesystem.h" #include "eal_private.h" +static const char sys_cpu_dir[] = "/sys/devices/system/cpu"; + uint64_t get_tsc_freq_arch(void) { - return 0; + unsigned long cpu_hz; + char path[PATH_MAX]; + + snprintf(path, sizeof(path), "%s/cpu%d/cpufreq/cpuinfo_cur_freq", + sys_cpu_dir, rte_get_master_lcore()); + if (eal_parse_sysfs_value(path, &cpu_hz) < 0) + RTE_LOG(WARNING, EAL, "Unable to parse %s\n", path); + + return cpu_hz*1000; } -- 2.14.1