From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Sat, 16 Dec 2000 16:41:20 -0500 From: Daniel Jacobowitz To: Tony Mantler Cc: linuxppc-dev@lists.linuxppc.org Subject: Re: SMP stall on process creation Message-ID: <20001216164119.A19128@drow.them.org> References: <20001216160004.A18814@drow.them.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: ; from nicoya@apia.dhs.org on Sat, Dec 16, 2000 at 03:34:14PM -0600 Sender: owner-linuxppc-dev@lists.linuxppc.org List-Id: On Sat, Dec 16, 2000 at 03:34:14PM -0600, Tony Mantler wrote: > At 3:00 PM -0600 12/16/2000, Daniel Jacobowitz wrote: > >I've been using a dual G4/500 with the linuxppc_2_5 tree for a couple weeks > >now, and having all sorts of strange problems. While trying to debug one > >(console corruption on select, and sometimes on boot), I discovered > >something very interesting. > > > >I ran, in zsh, this command: > >% time (for i in {1..100}; do /bin/echo -n; done) > > > >on several machines. On an old 604e/200: > > 0.52s user 1.25s system 100% cpu 1.759 total > Just ran this on my 9600/200mp, 2.4.0-test11 (linux-pmac-devel, not > terribly current). time says: > 0.84s user 2.63s system 100% cpu 3.466 total That's kind of upsetting right there :) If I can figure out how to do profiling I'll try to track this down. Dan /--------------------------------\ /--------------------------------\ | Daniel Jacobowitz |__| SCS Class of 2002 | | Debian GNU/Linux Developer __ Carnegie Mellon University | | dan@debian.org | | dmj+@andrew.cmu.edu | \--------------------------------/ \--------------------------------/ ** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/