summaryrefslogtreecommitdiffstats
path: root/man3/pthread_setconcurrency.3
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--man3/pthread_setconcurrency.317
1 files changed, 8 insertions, 9 deletions
diff --git a/man3/pthread_setconcurrency.3 b/man3/pthread_setconcurrency.3
index 642208f..0c2ffd0 100644
--- a/man3/pthread_setconcurrency.3
+++ b/man3/pthread_setconcurrency.3
@@ -3,7 +3,7 @@
.\"
.\" SPDX-License-Identifier: Linux-man-pages-copyleft
.\"
-.TH pthread_setconcurrency 3 2023-07-20 "Linux man-pages 6.05.01"
+.TH pthread_setconcurrency 3 2023-10-31 "Linux man-pages 6.7"
.SH NAME
pthread_setconcurrency, pthread_getconcurrency \- set/get
the concurrency level
@@ -13,7 +13,7 @@ POSIX threads library
.SH SYNOPSIS
.nf
.B #include <pthread.h>
-.PP
+.P
.BI "int pthread_setconcurrency(int " new_level );
.BI "int pthread_getconcurrency(" void );
.fi
@@ -27,12 +27,12 @@ The implementation takes this only as a hint:
POSIX.1 does not specify the level of concurrency that
should be provided as a result of calling
.BR pthread_setconcurrency ().
-.PP
+.P
Specifying
.I new_level
as 0 instructs the implementation to manage the concurrency level
as it deems appropriate.
-.PP
+.P
.BR pthread_getconcurrency ()
returns the current value of the concurrency level for this process.
.SH RETURN VALUE
@@ -40,7 +40,7 @@ On success,
.BR pthread_setconcurrency ()
returns 0;
on error, it returns a nonzero error number.
-.PP
+.P
.BR pthread_getconcurrency ()
always succeeds, returning the concurrency level set by a previous call to
.BR pthread_setconcurrency (),
@@ -54,7 +54,7 @@ can fail with the following error:
.B EINVAL
.I new_level
is negative.
-.PP
+.P
POSIX.1 also documents an
.B EAGAIN
error ("the value specified by
@@ -75,7 +75,6 @@ T{
.BR pthread_getconcurrency ()
T} Thread safety MT-Safe
.TE
-.sp 1
.SH STANDARDS
POSIX.1-2008.
.SH HISTORY
@@ -83,14 +82,14 @@ glibc 2.1.
POSIX.1-2001.
.SH NOTES
The default concurrency level is 0.
-.PP
+.P
Concurrency levels are meaningful only for M:N threading implementations,
where at any moment a subset of a process's set of user-level threads
may be bound to a smaller number of kernel-scheduling entities.
Setting the concurrency level allows the application to
give the system a hint as to the number of kernel-scheduling entities
that should be provided for efficient execution of the application.
-.PP
+.P
Both LinuxThreads and NPTL are 1:1 threading implementations,
so setting the concurrency level has no meaning.
In other words,