[PATCHv3 4/4] cpupower: ToDo: Update ToDo with ideas for per_cpu_schedule handling

From: Natarajan, Janakarajan
Date: Tue Nov 05 2019 - 12:17:10 EST


From: Janakarajan Natarajan <Janakarajan.Natarajan@xxxxxxx>

Based on Thomas Renninger's feedback/ideas. Re-structure the code
to better handle the per_cpu_schedule mechanism which was introduced
when adding support for AMD Zen based processors.

Signed-off-by: Janakarajan Natarajan <Janakarajan.Natarajan@xxxxxxx>
---
tools/power/cpupower/ToDo | 14 ++++++++++++++
1 file changed, 14 insertions(+)

diff --git a/tools/power/cpupower/ToDo b/tools/power/cpupower/ToDo
index 6e8b89f282e6..b196a139a3e4 100644
--- a/tools/power/cpupower/ToDo
+++ b/tools/power/cpupower/ToDo
@@ -8,3 +8,17 @@ ToDos sorted by priority:
- Add another c1e debug idle monitor
-> Is by design racy with BIOS, but could be added
with a --force option and some "be careful" messages
+- Add cpu_start()/cpu_stop() callbacks for monitor
+ -> This is to move the per_cpu logic from inside the
+ monitor to outside it. This can be given higher
+ priority in fork_it.
+- Fork as many processes as there are CPUs in case the
+ per_cpu_schedule flag is set.
+ -> Bind forked process to each cpu.
+ -> Execute start measures via the forked processes on
+ each cpu.
+ -> Run test executable in a forked process.
+ -> Execute stop measures via the forked processes on
+ each cpu.
+ This would be ideal as it will not introduce noise in the
+ tested executable.
--
2.17.1