[Goodies-dev] [Bug 15328] New: genmon moderate CPU use (excluding my scripts)

[bugzilla-daemon at xfce.org]

https://bugzilla.xfce.org/show_bug.cgi?id=15328

            Bug ID: 15328
           Summary: genmon moderate CPU use (excluding my scripts)
    Classification: Panel Plugins
           Product: Xfce4-genmon-plugin
           Version: unspecified
          Hardware: PC (x86_64)
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: Medium
         Component: General
          Assignee: goodies-dev at xfce.org
          Reporter: tcll5850 at gmail.com
  Target Milestone: ---

to start off, I'm not gonna say my scripts don't need optimization
(particularly my network script)

but I was able to fit my mem/swap script right in the genmon command entry:
`sh -c "free -m|awk 'FNR==2{printf(\"mem: %d / %d MiB\n\",$3,$2)}'&&free -m|awk
'FNR==2{printf(\"swap: %d / %d MiB\n\",$3,$2)}'"`
I know it's messy, but for some reason there's a character limit, and for some
reason I can't seem to use `|` directly, so `sh -c ""` is required...

doing this uses significantly less CPU than HDD polling, though it's still a
significant amount due to `sh -c ""` and apparent process respawning over
something like Python's `exec()`.

my network script is another story, which seems to be polled from the HDD every
0.25 seconds, though I could be wrong here (assumption from the performance hit
on a 10-line script)...

anyways, having both of these running at 0.25 consumes about 25-30% of my CPU
(it's a cruddy x64 Pentium4 with HT on for stability)
(0.25 because I like to know exactly what's going on, would go 0.125 (or 0.12
as for some reason limited) if I had the hardware ceiling to)

is it possible I could run in a while loop so I could greatly reduce CPU use
from process spawns??
the rest is just the cat and awk commands in my scripts that could probably be
optimized.

I hope you're not trying to enforce disk reads every spawn as that would be
very bad. ;)

at a glance, this plugin seems to be single-threaded as I can't open the
options while in use
it waits for the spawn to finish before showing the R-click menu.


how would I recommend better?
dual-thread the spawn process while re-executing the shell code and remove the
character and command limits (the command should be handled the same as a line
in the terminal).
(it's better to store the process code in memory than to re-read it from the
script file on the HDD)

if I could write this plugin in python, I could probably write something more
efficient.

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