From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stephane Eranian Date: Wed, 05 Mar 2003 22:54:16 +0000 Subject: [Linux-ia64] RHAS Errata e25 perfmon update Message-Id: List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-ia64@vger.kernel.org To All, If you are using RedHat Advanced Server 2.1 (Derry) and the latest Errata which comes with a kernel labeled e.25 you will have problems if you try to use perfmon. Due to some bugs in perfmon, the entire subsystem was disabled. As a consequence, all software relying on this subsystem will not work. This includes pfmon, but also PAPI-based software. I have generated a patch which fixes the problem AND also updates RHAS perfmon to version 1.3 similar to what we have in 2.4.20 or higher. This includes new features such as sampling period randomizations and idle task exclusion in system-wide mode. The patch must be applied on top of the e.25 kernel source tree. You will need to reconfigure the kernel via make menuconfig (or equivalent) to re-enable perfmon,i.e., CONFIG_PERFMON must be set. The patch can be downloaded from the perfmon website at: http://www.hpl.hp.com/research/linux/perfmon -- -Stephane