Date: Thu, 12 Jun 2008 21:52:29 +0000 From: John Birrell <jb@what-creek.com> To: Diego Depaoli <trebestie@gmail.com> Cc: current@freebsd.org Subject: Re: Getting started with DTrace in FreeBSD-current (a.k.a. 8) Message-ID: <20080612215229.GA68604@what-creek.com> In-Reply-To: <83e5fb980806121438m1e627af9vf9ab294ca56206eb@mail.gmail.com> References: <20080611051257.GA51683@what-creek.com> <83e5fb980806121438m1e627af9vf9ab294ca56206eb@mail.gmail.com>
next in thread | previous in thread | raw e-mail | index | archive | help
On Thu, Jun 12, 2008 at 11:38:50PM +0200, Diego Depaoli wrote: > 2008/6/11 John Birrell <jb@what-creek.com>: > > > > It's been a few weeks now since I committed DTrace support to current. > > I'm curious... impact over performances? DTrace is supposed to be low impact until you enable probes. When you enable probes, the impact depends on how many probes, how often they are called and what the actions do. > kern_dtrace.o(.text+0x1e0): first defined here > ld: Warning: size of symbol `kdb_enter' changed from 34 in > kern_dtrace.o to 70 in subr_kdb.o > *** Error code 1 Try removing the #ifndef and the code it contains in kern_dtrace.c. It looks like the kdb_enter function is always compiled in. -- John Birrell
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20080612215229.GA68604>