[RFC PATCH 09/10] drivers/perf: Add support for ARMv8.2 Statistical Profiling Extension
From: peterz@infradead.org (Peter Zijlstra)
Date: 2017-01-04 10:37:29
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On Tue, Jan 03, 2017 at 06:10:26PM +0000, Will Deacon wrote:
The ARMv8.2 architecture introduces the Statistical Profiling Extension (SPE). SPE provides a way to configure and collect profiling samples from the CPU in the form of a trace buffer, which can be mapped directly into userspace using the perf AUX buffer infrastructure. This patch adds support for SPE in the form of a new perf driver.
Can you give a little high level overview of what exactly SPE is?