Re: [RFC PATCH 0/2] sched: move content out of core files for loadaverage

From: Charles Wang
Date: Thu Apr 18 2013 - 22:18:03 EST


On 04/19/2013 07:43 AM, Paul Turner wrote:
We could use a name along the lines of "load_index.c"; it calls to
mind where we actually consume these values and (being specific) is
less overloaded than load_avg.
Hmm... How about using "load_machine.c" "load_cpu.c" and "load_entity.c"?

Thanks,
Charles
On Thu, Apr 18, 2013 at 4:13 PM, Paul Gortmaker
<paul.gortmaker@xxxxxxxxxxxxx> wrote:
[Re: [RFC PATCH 0/2] sched: move content out of core files for load average] On 18/04/2013 (Thu 23:06) Rakib Mullick wrote:

On Thu, Apr 18, 2013 at 9:54 PM, Paul Gortmaker
<paul.gortmaker@xxxxxxxxxxxxx> wrote:
On 13-04-18 07:14 AM, Peter Zijlstra wrote:
On Mon, 2013-04-15 at 11:33 +0200, Ingo Molnar wrote:
* Paul Gortmaker <paul.gortmaker@xxxxxxxxxxxxx> wrote:

Recent activity has had a focus on moving functionally related blocks of stuff
out of sched/core.c into stand-alone files. The code relating to load average
calculations has grown significantly enough recently to warrant placing it in a
separate file.

Here we do that, and in doing so, we shed ~20k of code from sched/core.c (~10%).

A couple small static functions in the core sched.h header were also localized
to their singular user in sched/fair.c at the same time, with the goal to also
reduce the amount of "broadcast" content in that sched.h file.
Nice!

Peter, is this (and the naming of the new file) fine with you too?
Yes and no.. that is I do like the change, but I don't like the
filename. We have _waaaay_ too many different things we call load_avg.

That said, I'm having a somewhat hard time coming up with a coherent
alternative :/
Several of the relocated functions start their name with "calc_load..."
Does "calc_load.c" sound any better?

How about sched_load.c ?
No, that doesn't work since it duplicates the path info in the file
name -- something that none of the other kernel/sched/*.c files do.
Do a "ls -1 kernel/sched" to see what I mean if it is not clear.

I honestly didn't spend a lot of time thinking about the file name.
I chose load_avg.c since it had a parallel to the /proc/loadavg that
linux has had since the early 1990s. I have no real attachment
to that name, but at the same time I'd like to avoid having name
choice become a bikeshedding event...

Thanks,
Paul.
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