Commit Graph

18 Commits

Author SHA1 Message Date
Nathan Scott 6b443c5da9 Merge branch 'hishamhm-pull-932' 2020-08-20 14:47:07 +10:00
Nathan Scott 0f76359e4e Merge branch 'hishamhm-pull-890' 2020-08-20 14:01:47 +10:00
Nathan Scott 2be0992700 Merge branch 'hishamhm-pull-890' 2020-08-20 14:00:13 +10:00
Nathan Scott 7ac1c709b7 Re-generate all headers with latest scripts/MakeHeader.py
Sync-up missing extern declarations for many functions.
2020-08-18 17:41:49 +10:00
Ran Benita 08feb8585b Add pressure stall information (PSI) meters on Linux
The pressure stall information (PSI) metrics provide useful information
on delays caused by waiting for CPU, IO and memory. Particularly on busy
servers it can provide a quick overview of what's "slowing things down".

This feature is supported on Linux >= 4.20.
The interface is documented here:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/plain/Documentation/accounting/psi.txt
These links provide rationale:
https://lwn.net/Articles/759781/
https://facebookmicrosites.github.io/psi/

The following metrics are added, corresponding to the currently exposed
lines (see `head /proc/pressure/*`):
- PressureStallCPUSome
- PressureStallIOSome
- PressureStallIOFull
- PressureStallMemorySome
- PressureStallMemoryFull

The color scheme is the same as that used for Load Average, however I
gave it separate entries just in case someone wants to change them
specifically.

Tested on 4.20.7-arch1-1-ARCH, on the linux platform.
Also tested that other platforms still compile (changed configure to use
the unsupported platform).

Closes #879.
2019-02-13 22:38:10 +02:00
Explorer09 1f3d85b617 Mark signal tables 'const'
Specifically, Platform_signals[] and Platform_numberOfSignals. Both are
not supposed to be mutable. Marking them 'const' puts them into rodata
sections in binary. And for Platform_numberOfSignals, this aids
optimization (aids only Link Time Optimization for now). :)

Signed-off-by: Kang-Che Sung <explorer09@gmail.com>
2016-08-30 20:41:17 +08:00
Explorer09 6dae8108f8 Introduce CLAMP macro. Unify all MIN(MAX(a,b),c) uses.
With the CLAMP macro replacing the combination of MIN and MAX, we will
have at least two advantages:
1. It's more obvious semantically.
2. There are no more mixes of confusing uses like MIN(MAX(a,b),c) and
   MAX(MIN(a,b),c) and MIN(a,MAX(b,c)) appearing everywhere. We unify
   the 'clamping' with a single macro.
Note that the behavior of this CLAMP macro is different from
the combination `MAX(low,MIN(x,high))`.
* This CLAMP macro expands to two comparisons instead of three from
  MAX and MIN combination. In theory, this makes the code slightly
  smaller, in case that (low) or (high) or both are computed at
  runtime, so that compilers cannot optimize them. (The third
  comparison will matter if (low)>(high); see below.)
* CLAMP has a side effect, that if (low)>(high) it will produce weird
  results. Unlike MIN & MAX which will force either (low) or (high) to
  win. No assertion of ((low)<=(high)) is done in this macro, for now.

This CLAMP macro is implemented like described in glib
<http://developer.gnome.org/glib/stable/glib-Standard-Macros.html>
and does not handle weird uses like CLAMP(a++, low++, high--) .
2016-01-15 20:26:01 +08:00
Michael Klein cc23d13f87 Add Platform_getProcessEnv
- currently implemented for darwin and linux
2015-12-03 22:23:40 +01:00
Hisham Muhammad 3fe2f3e28e Move list of signals to platform-specific code.
Implementations for Linux (tested) and FreeBSD (still untested, thanks to @etosan for providing the table).
Darwin and OpenBSD(ping @mmcco) builds should be broken now, pending their own tables.
2015-10-06 03:02:49 -03:00
Hisham Muhammad 4e064e0db7 Build fixes to resync with FreeBSD changes. 2015-03-16 23:03:40 -03:00
Hisham Muhammad 5c8b83405b Merge branch 'master' into wip
Conflicts:
	Process.c
	Process.h
	linux/LinuxProcess.c
	linux/LinuxProcess.h
	linux/LinuxProcessList.c
	unsupported/Platform.c
	unsupported/Platform.h
2015-03-16 03:22:33 -03:00
Hisham Muhammad be1700cf94 Isolate portable and Linux-specific process fields. 2015-03-16 01:43:04 -03:00
Hisham Muhammad e3fe3962cb Move more Linux-specific code into Linux subdir. 2015-03-15 20:29:13 -03:00
Hisham Muhammad 9780c312f4 Fix allocation of processes. Closes #166.
Conflicts:
	Process.c
	Process.h
	ProcessList.c
	ScreenManager.c
	linux/LinuxProcessList.c
2015-02-23 01:13:40 -03:00
Hisham Muhammad 6f868b00c0 Fix allocation of processes. Closes #166. 2015-02-20 14:52:10 -02:00
Hisham Muhammad c2108e5a48 Another mega-patch for the refactoring process.
Kinda runs, but functionality from the original main loop
is still missing. Patience.
2015-01-23 03:08:21 -02:00
Hisham Muhammad 3383d8e556 Sorry about the mega-patch.
This is a work-in-progress, code is currently broken.
(Some actions, and notably, the header, are missing.)
2015-01-21 23:27:31 -02:00
Hisham Muhammad 430c7c9a9b Move platform-dependent parts of Linux battery meter. 2014-11-27 21:04:57 -02:00