linux-kernel - L1-icache-loads statistics on i7 2600k?

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Message-ID: <5170C1BB.1090707@felixbecker.name>
Date:	Fri, 19 Apr 2013 06:02:03 +0200
From:	Felix Becker <mail@...ixbecker.name>
To:	linux-kernel@...r.kernel.org
Subject: L1-icache-loads statistics on i7 2600k?

Hi,

i'm trying to trace the caching behaviour of one of my applications
using the "perf" tool. On my i7 Q 820 i can see the l1 instruction
cache loads using "perf stat -e L1-icache-loads" On my i7-2600k i'm
getting "<not supported> L1-icache-loads"

Tracing the following events works fine:

L1-dcache-loads
L1-dcache-load-misses
L1-icache-load-misses

So do you know why it is possible to read dcache loads / misses and
icache misses, but not icache loads? Doesn't the i7 2600k PMU provide
this value or is something wrong with my kernel on this machine?

Regards

Felix
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