Kan Liang 3877d55a0d perf/x86/intel/cstate: Add Sierra Forest support
A new module C6 Residency Counter is introduced in the Sierra Forest.
The scope of the new counter is module (A cluster of cores shared L2
cache). Create a brand new cstate_module PMU to profile the new counter.
The only differences between the new cstate_module PMU and the existing
cstate PMU are the scope and events.

Regarding the choice of the new cstate_module PMU name, the current
naming rule of a cstate PMU is "cstate_" + the scope of the PMU. The
scope of the PMU is the cores shared L2. On SRF, Intel calls it
"module", while the internal Linux sched code calls it "cluster". The
"cstate_module" is used as the new PMU name, because
- The Cstate PMU driver is a Intel specific driver. It doesn't impact
  other ARCHs. The name makes it consistent with the documentation.
- The "cluster" mainly be used by the scheduler developer, while the
  user of cstate PMU is more likely a researcher reading HW docs and
  optimizing power.
- In the Intel's SDM, the "cluster" has a different meaning/scope for
  topology. Using it will mislead the end users.

Besides the module C6, the core C1/C6 and pkg C6 residency counters are
supported in the Sierra Forest as well.

Suggested-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20231116142245.1233485-3-kan.liang@linux.intel.com
2023-11-17 10:54:53 +01:00
..
2023-11-15 10:15:40 +01:00
2023-10-27 15:05:09 +02:00
2022-08-27 00:05:44 +02:00
2023-08-09 21:51:06 +02:00
2021-02-10 14:44:54 +01:00
2021-02-10 14:44:54 +01:00