Add a helper function cpus_online() that returns the count of online CPUs.
Signed-off-by: Tommi Rantala <tommi.t.rantala@xxxxxxxxx>
---
src/include/rt-utils.h | 1 +
src/lib/rt-utils.c | 12 ++++++++++++
2 files changed, 13 insertions(+)
diff --git a/src/include/rt-utils.h b/src/include/rt-utils.h
index ef0f6ac..d744ded 100644
--- a/src/include/rt-utils.h
+++ b/src/include/rt-utils.h
@@ -23,5 +23,6 @@ const char *policy_to_string(int policy);
uint32_t string_to_policy(const char *str);
pid_t gettid(void);
+long cpus_online(void);
#endif /* __RT_UTILS.H */
diff --git a/src/lib/rt-utils.c b/src/lib/rt-utils.c
index ac6878c..0b1fc1e 100644
--- a/src/lib/rt-utils.c
+++ b/src/lib/rt-utils.c
@@ -320,3 +320,15 @@ pid_t gettid(void)
{
return syscall(SYS_gettid);
}
+
+long cpus_online(void)
+{
+ long cpus = sysconf(_SC_NPROCESSORS_ONLN);
+
+ if (cpus <= 0)
+ err_msg_n(errno,
+ "WARN: sysconf(_SC_NPROCESSORS_ONLN) returned %ld",
+ cpus);
+
+ return cpus;
+}
--
2.9.3
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