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Date: Mon, 31 Aug 2015 06:26:00 -0700 From: Guenter Roeck <linux@...ck-us.net> To: Peter Zijlstra <peterz@...radead.org>, Borislav Petkov <bp@...en8.de> CC: Ingo Molnar <mingo@...nel.org>, Huang Rui <ray.huang@....com>, Borislav Petkov <bp@...e.de>, Jean Delvare <jdelvare@...e.de>, Andy Lutomirski <luto@...capital.net>, Andreas Herrmann <herrmann.der.user@...il.com>, Thomas Gleixner <tglx@...utronix.de>, "Rafael J. Wysocki" <rjw@...ysocki.net>, Len Brown <lenb@...nel.org>, John Stultz <john.stultz@...aro.org>, Frédéric Weisbecker <fweisbec@...il.com>, lm-sensors@...sensors.org, linux-kernel@...r.kernel.org, x86@...nel.org, Andreas Herrmann <herrmann.der.user@...glemail.com>, Aravind Gopalakrishnan <Aravind.Gopalakrishnan@....com>, Fengguang Wu <fengguang.wu@...el.com>, Aaron Lu <aaron.lu@...el.com>, Tony Li <tony.li@....com> Subject: Re: [PATCH 09/15] x86, amd: add accessor for number of cores per compute unit On 08/31/2015 01:38 AM, Peter Zijlstra wrote: > On Sun, Aug 30, 2015 at 05:53:22PM +0200, Borislav Petkov wrote: >> On Sat, Aug 29, 2015 at 11:19:14AM +0200, Ingo Molnar wrote: >>> So let me withdraw my ack: the much more important question that I >>> missed first time around, why is this reporting feature living in >>> hwmon, not in perf? We have energy reporting facilities in perf that >>> this should be synced to. >> >> Because there's already fam15h_power driver which is exactly for that. >> Making it part of perf is then a question of cat-ting the same sysfs >> file twice, at the beginning and at the end of the trace, which is >> trivial. > > That don't make sense. > > Looking at the BKDG Fam 15h 60h-6Fh these MSRs are per compute unit. > This means you can do much finer grained measurements than system wide > -- which is all hwmon seems capable of. > Is it ? Why ? Guenter -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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