diff options
Diffstat (limited to 'man3/pthread_setconcurrency.3')
| -rw-r--r-- | man3/pthread_setconcurrency.3 | 17 |
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, |