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Message-Id: <cover.1323739287.git.luto@amacapital.net> 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/
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