PR_SVE_GET_VL(2const) — Справочная страница Linux

PR_SVE_GET_VL(2const)                              PR_SVE_GET_VL(2const)

ИМЯ

       PR_SVE_GET_VL - get the thread's SVE vector length

БИБЛИОТЕКА

       Standard C library (libc, -lc)

СИНТАКСИС

       #include <linux/prctl.h>  /* Definition of PR_* constants */
       #include <sys/prctl.h>

       int prctl(PR_SVE_GET_VL);

ОПИСАНИЕ

       Get the thread's current SVE vector length configuration.

       This operation returns a nonnegative value that describes the
       current configuration.  The bits corresponding to
       PR_SVE_VL_LEN_MASK contain the currently configured vector length
       in bytes.  The bit corresponding to PR_SVE_VL_INHERIT indicates
       whether the vector length will be inherited across execve(2).

ЗНАЧЕНИЕ, ВОЗВРАЩАЕМОЕ ФУНКЦИЕЙ

       On success, PR_SVE_GET_VL, return the nonnegative values
       described above.  On error, -1 is returned, and errno is set to
       indicate the error.

ОШИБКИ

       EINVAL SVE is not available on this platform.

СТАНДАРТЫ

       Linux.  arm64 only.

ИСТОРИЯ

       Linux 4.15 (arm64).

ЗАМЕЧАНИЯ

       There is no way to determine whether there is a pending vector
       length change that has not yet taken effect.

СМОТРИТЕ ТАКЖЕ

       prctl(2), PR_SVE_SET_VL(2const)

       For more information, see the kernel source file
       Documentation/arm64/sve.rst (or Documentation/arm64/sve.txt
       before Linux 5.3).

КОЛОФОН

       This page is part of the man-pages (Linux kernel and C library
       user-space interface documentation) project.  Information about
       the project can be found at 
       ⟨https://www.kernel.org/doc/man-pages/⟩.  If you have a bug report
       for this manual page, see
       ⟨https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/CONTRIBUTING⟩.
       This page was obtained from the tarball man-pages-6.9.1.tar.gz
       fetched from
       ⟨https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/⟩ on
       2024-06-26.  If you discover any rendering problems in this HTML
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       part of the original manual page), send a mail to
       man-pages@man7.org

Linux man-pages 6.9.1          2024-06-02          PR_SVE_GET_VL(2const)

Страницы, которые ссылаются на эту страницу: prctl(2), PR_SVE_SET_VL(2const)