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

Lennart Poettering lennart at poettering.net
Wed Feb 13 15:32:33 PST 2013

On Wed, 13.02.13 14:27, Kok, Auke-jan H (auke-jan.h.kok at intel.com) wrote:

> > 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 :^)

RSS is an acronym for "Residential Set Size". PSS for
"Propertional Set Size". Hence the option for bootchart should be

What does the option actually do? Do we actually need the option? If
not, we might just drop this source of confusion? And we do need it,
maybe make it explanatory as int "PlotProportionalSetSize=" or so?


Lennart Poettering - Red Hat, Inc.

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