Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755634Ab2JPSJ5 (ORCPT ); Tue, 16 Oct 2012 14:09:57 -0400 Received: from mail-ee0-f46.google.com ([74.125.83.46]:51599 "EHLO mail-ee0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755242Ab2JPSJ4 (ORCPT ); Tue, 16 Oct 2012 14:09:56 -0400 MIME-Version: 1.0 Date: Tue, 16 Oct 2012 13:09:55 -0500 Message-ID: Subject: VDSO gettimeofday() x86_64 linux 3.2 From: wilson self To: linux-kernel@vger.kernel.org Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 697 Lines: 16 I noticed recently that my get time of day calls are quite a bit slower than I would have expected; and it would see that a likely cause is that they are not going via vdso, but rather a system call. In older kernels there was kernel.vsyscall64 parameter to enable them, but this seems to be gone in later kernel releases. What config option or parameter might I be missing that could cause gettimeofday() to use the fallback methods? Thanks wilson -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/