On Wed, Feb 13, 2013 at 4:00 PM, Kay Sievers <k...@vrfy.org> wrote: > 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?
Right, that's totally fine with me, really. I suck at naming things ;^) EntropyGraph... similarly thus. Auke _______________________________________________ systemd-devel mailing list systemd-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/systemd-devel