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| author | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2021-09-06 12:22:54 -0300 |
|---|---|---|
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2021-09-27 09:13:06 -0300 |
| commit | 11a02b035b464ab6813676adfd19c4a59c36d907 (patch) | |
| tree | aadaa54c5ca5608981c8a2482ec184d022a0730a | |
| parent | 514638699d4b76826096a5f47136dc58f7619944 (diff) | |
| download | glibc-11a02b035b464ab6813676adfd19c4a59c36d907.zip glibc-11a02b035b464ab6813676adfd19c4a59c36d907.tar.gz glibc-11a02b035b464ab6813676adfd19c4a59c36d907.tar.bz2 | |
misc: Add __get_nprocs_sched
This is an internal function meant to return the number of avaliable
processor where the process can scheduled, different than the
__get_nprocs which returns a the system available online CPU.
The Linux implementation currently only calls __get_nprocs(), which
in tuns calls sched_getaffinity.
Reviewed-by: Florian Weimer <fweimer@redhat.com>
| -rw-r--r-- | include/sys/sysinfo.h | 7 | ||||
| -rw-r--r-- | malloc/arena.c | 2 | ||||
| -rw-r--r-- | misc/getsysstats.c | 6 | ||||
| -rw-r--r-- | sysdeps/mach/getsysstats.c | 6 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/getsysstats.c | 6 |
5 files changed, 25 insertions, 2 deletions
diff --git a/include/sys/sysinfo.h b/include/sys/sysinfo.h index 7388356..c490561 100644 --- a/include/sys/sysinfo.h +++ b/include/sys/sysinfo.h @@ -9,10 +9,15 @@ extern int __get_nprocs_conf (void); libc_hidden_proto (__get_nprocs_conf) -/* Return number of available processors. */ +/* Return number of available processors (not all of them will be + available to the caller process). */ extern int __get_nprocs (void); libc_hidden_proto (__get_nprocs) +/* Return the number of available processors which the process can + be scheduled. */ +extern int __get_nprocs_sched (void) attribute_hidden; + /* Return number of physical pages of memory in the system. */ extern long int __get_phys_pages (void); libc_hidden_proto (__get_phys_pages) diff --git a/malloc/arena.c b/malloc/arena.c index 4c39875..78ef4cf 100644 --- a/malloc/arena.c +++ b/malloc/arena.c @@ -878,7 +878,7 @@ arena_get2 (size_t size, mstate avoid_arena) narenas_limit = mp_.arena_max; else if (narenas > mp_.arena_test) { - int n = __get_nprocs (); + int n = __get_nprocs_sched (); if (n >= 1) narenas_limit = NARENAS_FROM_NCORES (n); diff --git a/misc/getsysstats.c b/misc/getsysstats.c index 2986d62..5cbba0f 100644 --- a/misc/getsysstats.c +++ b/misc/getsysstats.c @@ -44,6 +44,12 @@ weak_alias (__get_nprocs, get_nprocs) link_warning (get_nprocs, "warning: get_nprocs will always return 1") +int +__get_nprocs_sched (void) +{ + return 1; +} + long int __get_phys_pages (void) { diff --git a/sysdeps/mach/getsysstats.c b/sysdeps/mach/getsysstats.c index 1267f39..cc8023f 100644 --- a/sysdeps/mach/getsysstats.c +++ b/sysdeps/mach/getsysstats.c @@ -62,6 +62,12 @@ __get_nprocs (void) libc_hidden_def (__get_nprocs) weak_alias (__get_nprocs, get_nprocs) +int +__get_nprocs_sched (void) +{ + return __get_nprocs (); +} + /* Return the number of physical pages on the system. */ long int __get_phys_pages (void) diff --git a/sysdeps/unix/sysv/linux/getsysstats.c b/sysdeps/unix/sysv/linux/getsysstats.c index 8a5d342..e9c0dc4 100644 --- a/sysdeps/unix/sysv/linux/getsysstats.c +++ b/sysdeps/unix/sysv/linux/getsysstats.c @@ -87,6 +87,12 @@ __get_nprocs (void) libc_hidden_def (__get_nprocs) weak_alias (__get_nprocs, get_nprocs) +int +__get_nprocs_sched (void) +{ + return __get_nprocs (); +} + /* On some architectures it is possible to distinguish between configured and active cpus. */ |