On Thu, Feb 14, 2013 at 12:42 AM, Kok, Auke-jan H <auke-jan.h....@intel.com> wrote: > On Wed, Feb 13, 2013 at 3:32 PM, Lennart Poettering > <lenn...@poettering.net> wrote: >> On Wed, 13.02.13 14:27, Kok, Auke-jan H (auke-jan.h....@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 >> "ProportionalSetSize="? >> >> 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? > > When enabled, it creates an additional graph (just like the entropy > option, or, if you have booted with initcall_debug) that plots the PSS > for each process. > > It's a highly usable graph for people working on systems with less > memory, so, I'd like to keep it. > > Example of how it looks here: > > http://foo-projects.org/~sofar/bootchart-20120401-0710.svg > > Plotting of PSS is disabled by default since it has quite a > performance impact (it requires parsing /proc/<NN>/smaps for each > process, which can be hundreds of kilobytes large each).
That looks nice, yeah. But shouldn't it just be called PlotMemoryUsage= or something instead of the using the "algorithm name" in the config switch to enable it? Kay _______________________________________________ systemd-devel mailing list systemd-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/systemd-devel
