[systemd-devel] [PATCH] bootchart: use conf-parser & CamelCase names in .conf

[Kok, Auke-jan H]

On Wed, Feb 13, 2013 at 1:31 PM, Lennart Poettering
<lennart at poettering.net> wrote:
> On Wed, 13.02.13 12:20, Kok, Auke-jan H (auke-jan.h.kok at intel.com) wrote:
>
>>
>> On Wed, Feb 13, 2013 at 11:31 AM, Lennart Poettering
>> <lennart at poettering.net> wrote:
>> > On Wed, 13.02.13 20:24, Thomas Hindoe Paaboel Andersen (phomes at gmail.com) wrote:
>> >
>> >> +[Bootchart]
>> >> +#Samples=500
>> >> +#Freq=25
>> >> +#Rel=0
>> >> +#Filter=1
>> >> +#Output=<folder name, defaults to /var/log>
>>
>> This has changed to /run/log being the default with Harald's patch I
>> merged yesterday.
>>
>> >> +#Init=/path/to/init-binary
>> >> +#Pss=0
>> >
>> > Hmm, so in systemd so far we tried to avoid abbreviations like this in
>> > exported identifiers. So I'd really prefer if we could use "Frequency"
>> > instead of "Freq" here. Abbreviations and acronyms raise the bar for
>> > newcomers.
>>
>> agreed, as part of this conversion we should just rename these options
>> to Frequency, Relative.
>>
>> > It's not to say we'd never export abbreviations/acronyms anywhere in
>> > systemd, but if we do, then they must be very very well established...
>>
>> Pss, is still an acronym, but Let's keep it that way.
>
> Hmm, what does this stand for? Wikipedia doesn't have it, can't be that
> well known...

PSS is the alternative to RSS... You probably won't find an
explanation anywhere else but the kernel source code:

Documentation/filesystems/proc.txt:
=====
The /proc/PID/smaps is an extension based on maps, showing the memory
consumption for each of the process's mappings. For each of mappings there
is a series of lines such as the following:

08048000-080bc000 r-xp 00000000 03:02 13130      /bin/bash
Size:               1084 kB
Rss:                 892 kB
Pss:                 374 kB

[...]

The first of these lines shows the same information as is displayed for the
mapping in /proc/PID/maps.  The remaining lines show the size of the mapping
(size), the amount of the mapping that is currently resident in RAM (RSS), the
process' proportional share of this mapping (PSS),
=====

so, PSS translates to "proportional share of the mapping(size) that is
resident in RAM"

PSS will do fine, I suppose :^)

Auke