unofficial mirror of libc-alpha@sourceware.org
 help / color / mirror / Atom feed
From: "naohirot@fujitsu.com" <naohirot@fujitsu.com>
To: 'Szabolcs Nagy' <szabolcs.nagy@arm.com>
Cc: "libc-alpha@sourceware.org" <libc-alpha@sourceware.org>
Subject: RE: [PATCH 4/5] scripts: Added Vector Length Set test helper script
Date: Tue, 30 Mar 2021 07:25:09 +0000	[thread overview]
Message-ID: <TYAPR01MB602515574C178A64F4A6EB61DF7D9@TYAPR01MB6025.jpnprd01.prod.outlook.com> (raw)
In-Reply-To: <20210329132017.GF23289@arm.com>

Szabolcs-san,

Thank you for your review.

> > +def main(args):
> > +    libc = CDLL("libc.so.6")
> > +    if not libc.getauxval(AT_HWCAP) & HWCAP_SVE:
> > +        print("CPU doesn't support SVE")
> > +        sys.exit(EXIT_UNSUPPORTED)
> > +
> > +    libc.prctl(PR_SVE_SET_VL,
> > +               args.vl[0] | PR_SVE_SET_VL_ONEXEC |
> PR_SVE_VL_INHERIT)
> > +    os.execvp(args.args[0], args.args)
> > +    print("exec system call failure")
> > +    sys.exit(EXIT_FAILURE)
> 
> 
> this only works on a (new enough) glibc based system and python's CDLL path
> lookup can fail too (it does not follow the host system configuration).

I see, I didn't notice that.

> but i think there is no simple solution without compiling c code and this seems
> useful, so i'm happy to have this script.

OK, thanks!
Naohiro


  reply	other threads:[~2021-03-30  7:25 UTC|newest]

Thread overview: 36+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-17  2:28 [PATCH 0/5] Added optimized memcpy/memmove/memset for A64FX Naohiro Tamura
2021-03-17  2:33 ` [PATCH 1/5] config: Added HAVE_SVE_ASM_SUPPORT for aarch64 Naohiro Tamura
2021-03-29 12:11   ` Szabolcs Nagy via Libc-alpha
2021-03-30  6:19     ` naohirot
2021-03-17  2:34 ` [PATCH 2/5] aarch64: Added optimized memcpy and memmove for A64FX Naohiro Tamura
2021-03-29 12:44   ` Szabolcs Nagy via Libc-alpha
2021-03-30  7:17     ` naohirot
2021-03-17  2:34 ` [PATCH 3/5] aarch64: Added optimized memset " Naohiro Tamura
2021-03-17  2:35 ` [PATCH 4/5] scripts: Added Vector Length Set test helper script Naohiro Tamura
2021-03-29 13:20   ` Szabolcs Nagy via Libc-alpha
2021-03-30  7:25     ` naohirot [this message]
2021-03-17  2:35 ` [PATCH 5/5] benchtests: Added generic_memcpy and generic_memmove to large benchtests Naohiro Tamura
2021-03-29 12:03 ` [PATCH 0/5] Added optimized memcpy/memmove/memset for A64FX Szabolcs Nagy via Libc-alpha
2021-05-10  1:45 ` naohirot
2021-05-14 13:35   ` Szabolcs Nagy via Libc-alpha
2021-05-19  0:11     ` naohirot
2021-05-12  9:23 ` [PATCH v2 0/6] aarch64: " Naohiro Tamura
2021-05-12  9:26   ` [PATCH v2 1/6] config: Added HAVE_AARCH64_SVE_ASM for aarch64 Naohiro Tamura
2021-05-26 10:05     ` Szabolcs Nagy via Libc-alpha
2021-05-12  9:27   ` [PATCH v2 2/6] aarch64: define BTI_C and BTI_J macros as NOP unless HAVE_AARCH64_BTI Naohiro Tamura
2021-05-26 10:06     ` Szabolcs Nagy via Libc-alpha
2021-05-12  9:28   ` [PATCH v2 3/6] aarch64: Added optimized memcpy and memmove for A64FX Naohiro Tamura
2021-05-26 10:19     ` Szabolcs Nagy via Libc-alpha
2021-05-12  9:28   ` [PATCH v2 4/6] aarch64: Added optimized memset " Naohiro Tamura
2021-05-26 10:22     ` Szabolcs Nagy via Libc-alpha
2021-05-12  9:29   ` [PATCH v2 5/6] scripts: Added Vector Length Set test helper script Naohiro Tamura
2021-05-12 16:58     ` Joseph Myers
2021-05-13  9:53       ` naohirot
2021-05-20  7:34     ` Naohiro Tamura
2021-05-26 10:24       ` Szabolcs Nagy via Libc-alpha
2021-05-12  9:29   ` [PATCH v2 6/6] benchtests: Fixed bench-memcpy-random: buf1: mprotect failed Naohiro Tamura
2021-05-26 10:25     ` Szabolcs Nagy via Libc-alpha
2021-05-27  0:22   ` [PATCH v2 0/6] aarch64: Added optimized memcpy/memmove/memset for A64FX naohirot
2021-05-27 23:50     ` naohirot
2021-05-27  7:42   ` [PATCH v3 1/2] aarch64: Added optimized memcpy and memmove " Naohiro Tamura
2021-05-27  7:44   ` [PATCH v3 2/2] aarch64: Added optimized memset " Naohiro Tamura

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

  List information: https://www.gnu.org/software/libc/involved.html

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=TYAPR01MB602515574C178A64F4A6EB61DF7D9@TYAPR01MB6025.jpnprd01.prod.outlook.com \
    --to=naohirot@fujitsu.com \
    --cc=libc-alpha@sourceware.org \
    --cc=szabolcs.nagy@arm.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).