From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Ross Ridge" Date: Thu, 09 Nov 2000 15:40:32 +0000 Subject: Re: [Linux-ia64] Performance Monitor Internals: Message-Id: List-Id: References: In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-ia64@vger.kernel.org > I am currently working on the perfmon support for Linux/ia64 as you may > have seen for the recent patches. The goal is to support the entire set > of features of the Itanium PMU including EARS and BTB and not just counting. > Also support is planned for per process AND system-wide monitoring on > both UP and SMP systems. > > So I you have any ideas, concerns or want to contribute something, please > feel free to contact me. I'm also interested in using the performance monitor, but my only concern is if user processes will able to access the performance counters directly with a "mov 1,PMD[r2]" instruction, instead of having to use some sort of kernel service to access the counter. Essentially, all I'm looking for is a replacement for the IA-32's "RDTSC" instruction in the code I'm porting. Ross Ridge