linux-kernel - [RFC 0/2] ABI for clock_gettime

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:	Mon, 12 Dec 2011 17:26:36 -0800
From:	Andy Lutomirski <luto@...capital.net>
To:	linux-kernel@...r.kernel.org, Kumar Sundararajan <kumar@...com>,
	john stultz <johnstul@...ibm.com>, Arun Sharma <asharma@...com>
Cc:	Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	Andy Lutomirski <luto@...capital.net>
Subject: [RFC 0/2] ABI for clock_gettime_ns

On x86-64, clock_gettime is so fast that the overhead converting to and
from nanoseconds is non-negligible.  clock_gettime_ns is a different
interface that is potentially faster.  If people like the ABI, I'll
implement an optimized version.

For the git-inclined, this series is at
https://git.kernel.org/?p=linux/kernel/git/luto/linux.git;a=shortlog;h=refs/heads/timing/clock_gettime_ns/rfc_v1

Andy Lutomirski (2):
  Add clock_gettime_ns syscall
  x86-64: Add __vdso_clock_gettime_ns vsyscall

 arch/x86/include/asm/unistd_64.h |    2 +
 arch/x86/vdso/vclock_gettime.c   |   70 +++++++++++++++++++++++++++++---------
 arch/x86/vdso/vdso.lds.S         |    7 ++++
 include/linux/syscalls.h         |    2 +
 kernel/posix-timers.c            |   29 ++++++++++++++++
 5 files changed, 94 insertions(+), 16 deletions(-)

-- 
1.7.7.4

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/