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Fri, 22 Sep 2023 04:28:36 -0500 From: Wyes Karny To: CC: , , Wyes Karny Subject: [PATCH] tools/power turbostat: Increase the limit for fd opened Date: Fri, 22 Sep 2023 09:28:23 +0000 Message-ID: <20230922092823.478042-1-wyes.karny@amd.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: SATLEXMB03.amd.com (10.181.40.144) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BL02EPF0001A0FD:EE_|DS7PR12MB6119:EE_ X-MS-Office365-Filtering-Correlation-Id: 4fc895ab-dde7-454e-ad0e-08dbbb4e4da6 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:SATLEXMB04.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230031)(4636009)(396003)(346002)(136003)(376002)(39860400002)(451199024)(1800799009)(186009)(230921699003)(82310400011)(36840700001)(40470700004)(46966006)(6666004)(7696005)(426003)(40480700001)(40460700003)(36756003)(356005)(82740400003)(26005)(36860700001)(86362001)(40140700001)(2906002)(478600001)(83380400001)(47076005)(41300700001)(70206006)(6916009)(70586007)(16526019)(4326008)(8936002)(5660300002)(2616005)(1076003)(316002)(8676002)(54906003)(81166007)(44832011)(336012)(36900700001);DIR:OUT;SFP:1101; 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Fri, 22 Sep 2023 02:28:46 -0700 (PDT) X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1777775642912497489 X-GMAIL-MSGID: 1777775642912497489 When running turbostat, a system with 512 cpus reaches the limit for maximum number of file descriptors that can be opened. To solve this problem, the limit is raised to 2^15, which is a large enough number. Below data is collected from AMD server systems while running turbostat: |-----------+-------------------------------| | # of cpus | # of opened fds for turbostat | |-----------+-------------------------------| | 128 | 260 | |-----------+-------------------------------| | 192 | 388 | |-----------+-------------------------------| | 512 | 1028 | |-----------+-------------------------------| So, the new max limit would be sufficient up to 2^14 cpus. Signed-off-by: Wyes Karny Reviewed-by: Doug Smythies Tested-by: Doug Smythies --- tools/power/x86/turbostat/turbostat.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c index 9a10512e3407..23f1fe58289a 100644 --- a/tools/power/x86/turbostat/turbostat.c +++ b/tools/power/x86/turbostat/turbostat.c @@ -6717,6 +6717,18 @@ void cmdline(int argc, char **argv) } } +void set_rlimit(void) +{ + struct rlimit limit; + + limit.rlim_cur = 0x8000; + limit.rlim_max = 0x8000; + + if (setrlimit(RLIMIT_NOFILE, &limit) < 0) { + err(1, "Failed to set rlimit"); + } +} + int main(int argc, char **argv) { outf = stderr; @@ -6729,6 +6741,9 @@ int main(int argc, char **argv) probe_sysfs(); + if (!getuid()) + set_rlimit(); + turbostat_init(); msr_sum_record();