100 lines
2.7 KiB
Diff
100 lines
2.7 KiB
Diff
From 9263de80d08451beacc29e4eb83492234d648796 Mon Sep 17 00:00:00 2001
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Message-Id: <9263de80d08451beacc29e4eb83492234d648796.1587532692.git.kamalesh@linux.vnet.ibm.com>
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In-Reply-To: <cover.1587532692.git.kamalesh@linux.vnet.ibm.com>
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References: <cover.1587532692.git.kamalesh@linux.vnet.ibm.com>
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From: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com>
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Date: Tue, 21 Apr 2020 07:54:01 -0500
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Subject: [PATCH V4 03/14] lparstat: Read the online cores
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To: powerpc-utils-devel@googlegroups.com
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Cc: Tyrel Datwyler <tyreld@linux.ibm.com>,
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Nathan Lynch <nathanl@linux.ibm.com>,
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Naveen N . Rao <naveen.n.rao@linux.vnet.ibm.com>,
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Gautham R . Shenoy <ego@linux.vnet.ibm.com>,
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Vasant Hegde <hegdevasant@linux.vnet.ibm.com>
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The accumulation of PURR/SPURR values are total of all online CPU in
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the system, hence the timebase also needs to be scaled to the number
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of cores. Add a helper to read the online cores.
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Signed-off-by: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com>
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---
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src/lparstat.c | 32 ++++++++++++++++++++++++++++++++
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src/lparstat.h | 4 ++++
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2 files changed, 36 insertions(+)
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diff --git a/src/lparstat.c b/src/lparstat.c
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index b7cb2d2..1d0b3a7 100644
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--- a/src/lparstat.c
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+++ b/src/lparstat.c
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@@ -88,6 +88,11 @@ static int parse_smt_state(void)
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return __do_smt(false, cpus_in_system, threads_per_cpu, false);
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}
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+static int get_one_smt_state(int core)
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+{
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+ return __get_one_smt_state(core, threads_per_cpu);
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+}
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+
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void get_time()
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{
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struct timeval t;
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@@ -556,6 +561,31 @@ void get_smt_mode(struct sysentry *se, char *buf)
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sprintf(buf, "%d", smt_state);
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}
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+void get_online_cores(void)
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+{
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+ struct sysentry *se;
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+ int *core_state;
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+ int online_cores = 0;
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+ int i;
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+
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+ core_state = calloc(cpus_in_system, sizeof(int));
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+ if (!core_state) {
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+ fprintf(stderr, "Failed to read online cores\n");
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+ return;
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+ }
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+
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+ for (i = 0; i < cpus_in_system; i++) {
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+ core_state[i] = (get_one_smt_state(i) > 0);
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+ if (core_state[i])
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+ online_cores++;
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+ }
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+
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+ se = get_sysentry("online_cores");
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+ sprintf(se->value, "%d", online_cores);
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+
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+ free(core_state);
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+}
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+
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long long get_cpu_time_diff()
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{
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long long old_total = 0, new_total = 0;
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@@ -591,6 +621,8 @@ void init_sysinfo(void)
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fprintf(stderr, "Failed to capture system CPUs information\n");
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exit(rc);
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}
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+
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+ get_online_cores();
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}
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void init_sysdata(void)
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diff --git a/src/lparstat.h b/src/lparstat.h
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index ae84caf..6b65b48 100644
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--- a/src/lparstat.h
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+++ b/src/lparstat.h
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@@ -189,6 +189,10 @@ struct sysentry system_data[] = {
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.descr = "SMT",
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.get = &get_smt_mode},
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+ /* online cores, cpu_info_helpers::get_one_smt_state() */
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+ {.name = "online_cores",
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+ .descr = "Online Cores"},
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+
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/* /proc/stat */
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{.name = "cpu_total",
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.descr = "CPU Total Time"},
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--
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2.25.3
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