Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752221AbdHJH3P (ORCPT ); Thu, 10 Aug 2017 03:29:15 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:58811 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751391AbdHJH3N (ORCPT ); Thu, 10 Aug 2017 03:29:13 -0400 From: sathnaga@linux.vnet.ibm.com To: acme@kernel.org, mingo@kernel.org, linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org Cc: srikar@linux.vnet.ibm.com, bala24@linux.vnet.ibm.com, Satheesh Rajendran Subject: [PATCH 1/2] perf/bench/numa: Add functions to detect sparse numa nodes Date: Thu, 10 Aug 2017 12:58:49 +0530 X-Mailer: git-send-email 2.7.4 X-TM-AS-MML: disable x-cbid: 17081007-0048-0000-0000-000002580AFC X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 17081007-0049-0000-0000-0000480B92FD Message-Id: <1502350129-10489-1-git-send-email-sathnaga@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2017-08-10_02:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=0 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1706020000 definitions=main-1708100121 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1611 Lines: 64 From: Satheesh Rajendran Added functions 1) to get a count of all nodes that are exposed to userspace. These nodes could be memoryless cpu nodes or cpuless memory nodes, 2) to check given node is present and 3) to check given node has cpus This information can be used to handle sparse/discontiguous nodes. Reviewed-by: Srikar Dronamraju Signed-off-by: Satheesh Rajendran Signed-off-by: Balamuruhan S --- tools/perf/bench/numa.c | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) diff --git a/tools/perf/bench/numa.c b/tools/perf/bench/numa.c index 469d65b..efd7595 100644 --- a/tools/perf/bench/numa.c +++ b/tools/perf/bench/numa.c @@ -215,6 +215,41 @@ static const char * const numa_usage[] = { NULL }; +static int nr_numa_nodes(void) +{ + int node = 0, i; + + for (i = 0; i < g->p.nr_nodes; i++) { + if (numa_bitmask_isbitset(numa_nodes_ptr, i)) + node++; + } + return node; +} + +static bool is_node_present(int node) +{ + if (numa_bitmask_isbitset(numa_nodes_ptr, node)) + return true; + else + return false; +} + +static bool is_node_hascpu(int node) +{ + struct bitmask *cpu; + unsigned int i; + + cpu = numa_allocate_cpumask(); + if (numa_node_to_cpus(node, cpu) == 0) { + for (i = 0; i < cpu->size; i++) { + if (numa_bitmask_isbitset(cpu, i)) + return true; + } + } else + return false; // lets fall back to nocpus safely + return false; +} + static cpu_set_t bind_to_cpu(int target_cpu) { cpu_set_t orig_mask, mask; -- 2.7.4