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Tue, 3 Oct 2023 00:08:10 -0500 From: Wyes Karny To: CC: , , Wyes Karny , Doug Smythies Subject: [PATCH v2] tools/power turbostat: Increase the limit for fd opened Date: Tue, 3 Oct 2023 05:07:51 +0000 Message-ID: <20231003050751.525932-1-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: CO1PEPF000042AA:EE_|PH8PR12MB7303:EE_ X-MS-Office365-Filtering-Correlation-Id: bca22eee-9ced-4f80-01a7-08dbc3cebec8 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)(346002)(396003)(136003)(39860400002)(376002)(230922051799003)(64100799003)(451199024)(82310400011)(186009)(1800799009)(40470700004)(46966006)(36840700001)(83380400001)(7696005)(2616005)(47076005)(6666004)(36756003)(40140700001)(356005)(478600001)(36860700001)(40480700001)(86362001)(82740400003)(40460700003)(426003)(16526019)(6916009)(41300700001)(26005)(2906002)(8936002)(8676002)(70206006)(1076003)(5660300002)(336012)(4326008)(54906003)(81166007)(70586007)(44832011)(316002)(36900700001);DIR:OUT;SFP:1101; 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Mon, 02 Oct 2023 22:08:32 -0700 (PDT) X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1778709658202661875 X-GMAIL-MSGID: 1778709658202661875 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 (but this also depends on how many counters are enabled). Reviewed-by: Doug Smythies Tested-by: Doug Smythies Signed-off-by: Wyes Karny --- v1 -> v2: - Take care of already higher rlim_max, rlim_curr - Minor tweak in commit text tools/power/x86/turbostat/turbostat.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c index 9a10512e3407..1563a0ae7e4c 100644 --- a/tools/power/x86/turbostat/turbostat.c +++ b/tools/power/x86/turbostat/turbostat.c @@ -53,6 +53,8 @@ #define NAME_BYTES 20 #define PATH_BYTES 128 +#define MAX_NOFILE 0x8000 + enum counter_scope { SCOPE_CPU, SCOPE_CORE, SCOPE_PACKAGE }; enum counter_type { COUNTER_ITEMS, COUNTER_CYCLES, COUNTER_SECONDS, COUNTER_USEC }; enum counter_format { FORMAT_RAW, FORMAT_DELTA, FORMAT_PERCENT }; @@ -6717,6 +6719,22 @@ void cmdline(int argc, char **argv) } } +void set_rlimit(void) +{ + struct rlimit limit; + + if (getrlimit(RLIMIT_NOFILE, &limit) < 0) + err(1, "Failed to get rlimit"); + + if (limit.rlim_max < MAX_NOFILE) + limit.rlim_max = MAX_NOFILE; + if (limit.rlim_cur < MAX_NOFILE) + limit.rlim_cur = MAX_NOFILE; + + if (setrlimit(RLIMIT_NOFILE, &limit) < 0) + err(1, "Failed to set rlimit"); +} + int main(int argc, char **argv) { outf = stderr; @@ -6729,6 +6747,9 @@ int main(int argc, char **argv) probe_sysfs(); + if (!getuid()) + set_rlimit(); + turbostat_init(); msr_sum_record();