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Using this library allows us to receive swap info which is more
similar with result of command swapinfo.
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In FreeBSD /proc/pid/stat is missing we should use for top procstat
library.
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We should make better split os specify code for FreeBSD and Linux.
Idea comes from @liskin.
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* A queue reader for xmobar using `TQueue a` from `stm`.
This is a flexible and performat solution for sharing
data between arbitrary haskell and xmobar.
* I am not sure if I did the haddocks correctly.
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The existing support for the coretemp kernel driver only works with
Intel CPUs.
This commit extends support for temperature monitoring to AMD CPUs.
k10temp is a kernel driver for monitoring the temperature of AMD
processors. It supports everything from AMD's 10h (Opteron/Athlon)
family of processors to the latest 19h (Zen 3) family.
Reference: https://www.kernel.org/doc/html/latest/hwmon/k10temp.html
The meaning of the various temperatures made available has changed over
the years and only `Tctl` is available on processors prior to the 17h
family.
Labels for these temperatures are present but as Tctl and Tdie do not
contain a number I could not find a way to use these as
`checkedDataRetrieval` expects an integer label.
It is a PCI device and so an address needs to be supplied as part of the
configuration.
Example configuration:
`Run K10Temp "0000:00:18.3" ["--template", "T: <Tdie>C | <Tccd1>C"] 60`
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Exposing Common.Types and Common.Run is now redundant, but we could
break configurations out there, so i'm not sure if we should remove them.
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This plugin checks for new mail, provided that this mail is indexed by
notmuch. As mail that was tagged is moved from the new directory to
cur, the 'Mail' plugin (and its variants) won't work for such mail.
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Failed at least once in GitHub Actions:
predicate failed on: "Cpu: <fc=red>100</fc>% <fc=red>##########</fc>"
Also, there's no need to guard the Xmobar.Plugins.Monitors.CpuSpec
module with the with_alsa flag. (And it doesn't really work anyway,
hspec-discover doesn't care about what modules are declared in cabal, so
stack/ghc complains that "These modules are needed for compilation but
not listed in your .cabal file's other-modules:
Xmobar.Plugins.Monitors.AlsaSpec" and then fails to detect changes in
those modules.)
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This makes the Date plugin approximately twice as fast, and makes xmobar
up to about 5–10 % faster if Date is the only active plugin. (If more
expensive plugins like Network or MultiCpu are used, it doesn't make any
measurable difference.)
Micro-benchmark results on my HW:
Date Benchmarks/Date mean 2.833 μs ( +- 16.08 ns )
Date Benchmarks/DateZonedTime mean 5.020 μs ( +- 32.91 ns )
Date Benchmarks/DateWithTimeZone mean 2.827 μs ( +- 20.52 ns )
(DateZonedTime is the original implementation and DateWithTimeZone is
the implementation we had since 0.34 which never refreshes timezone.)
Real-life measurements (done overnight on an idle laptop, with all
measured xmobars running in parallel to ensure comparable conditions;
xmobars configured to only display date and with rate 10 — once per
second):
$ time timeout 6h xmobar .xmobarrc-DateZonedTime
real 360m0,010s
user 0m9,867s
sys 0m4,644s
(9.867 + 4.644) / (360 * 60) = 0.000672
$ time timeout 6h xmobar .xmobarrc-Date
real 360m0,008s
user 0m9,535s
sys 0m4,327s
(9.535 + 4.327) / (360 * 60) = 0.000642
$ time timeout 6h xmobar .xmobarrc-Date-10m
real 360m0,010s
user 0m9,780s
sys 0m4,215s
(9.780 + 4.215) / (360 * 60) = 0.000648
$ time timeout 6h xmobar .xmobarrc-DateWithTimeZone
real 360m0,006s
user 0m9,658s
sys 0m4,166s
(9.658 + 4.166) / (360 * 60) = 0.000640
(.xmobarrc-Date-10m is the proposed implementation, but with timezone
refresh every 10 minutes instead of every 1 minute)
Interpretation of these results:
* refreshing xmobar with just date takes around 650 μs
* that is xmobar with just date uses around 0.065 % of CPU time
* refreshing timezone takes additional cca 30 μs
When we only refresh timezone once a minute, these 30 μs become 0.5 μs
amortized, and that should be acceptable to even the most dedicated
perfectionist :-)
Fixes: a58e32f7c8af ("Revert "Optimize date plugin"")
Fixes: 878db3908060 ("Optimize date plugin")
Co-authored-by: Sibi Prabakaran <sibi@psibi.in>
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There's a longstanding bug in timezone-olson that causes it to fail to
read some zoneinfo files (but not all, oddly). This was resolved in
timezone-olson-0.2.0 which can be built against by using a later
Stackage snapshot than master currently points to.
This fix pushes the snapshot up to lts-16.0 and also modifies the
cabal version range for timezone-olson to set 0.2.0 as the minimum.
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Fixes https://github.com/jaor/xmobar/issues/463.
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Closes #457
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As documented in the http-client library, calling newManager is an
expensive operation:
```
Creating a new Manager is a relatively expensive operation, you are
advised to share a single Manager between requests instead.
```
But inspite of the haddocks in xmobar claiming that once 'Manager' is
created, it will be used throughout the monitor is not true. Because for
every call of `startWeather` a new manager is being created.
Also I removed the option in WeatherOpts because even if it is false,
it will be ultimately created in `getData` function. Also without
using a manager - the plugin won't really work. So, I don't think
there is any reason for this option to exist.
I have introduced a new dependency http-client-tls to use the shared
global manager so that we reuse the same manager every time. This
simplifies a lot of code. Note that this is not really a new
dependency because http-conduit already depends on it transitively.
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This adds a new `HandleReader` plugin, which displays data from a
Haskell `Handle`. This is really only useful if you are running xmobar
from within another Haskell program, but lets you avoid the mechanics of
creating a named pipe with the proper file permissions.
Instead, you can use `System.Process.createPipe` to make a pair of read
& write Handles. If you pass the read handle to HandleReader, you can
use hPutStr on the write Handle to send data to xmobar from your
application code.
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Version 0.10.8.1 contains a bug in the readFile function that misbehaves
on things like magic procfs files where stat(2) returns an st_size of
zero, which breaks the Net monitor and such; 0.10.8.2 contains the fix.
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NL80211 was introduced in Linux 2.6.24 in 2007 as a new extensible
universal API, replacing "wireless extensions" ioctls. It works on top
of netlink, and allows direct communication to cfg80211 kernel
subsystem. Since then it became a hard requirement for all upstream
wireless drivers to hook into cfg80211 (SoftMAC drivers do it via the
common mac80211 layer). There's still additional compatibility code that
allows limited Wext functionality for cfg80211 drivers but it's buggy
and can be disabled altogether when CONFIG_CFG80211_WEXT is not set.
This patch makes use of "netlink" Haskell library which doesn't have any
additional runtime dependencies (so neither iwlib nor libnl are
required). The operation is the same as performed by "iw dev <devname>
link" command.
The signal level is transformed to "quality" by first clamping it to
[-110; -40], then adding 110 and dividing by 70 (same meaningless
formula as used by the cfg80211 Wext compatibility layer).
"essid" template argument is replaced by more appropriate "ssid" (with
the old variant still available for backwards compatibility)
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This corrects my (wrong) assumption that the timer coordination thread
will only fail if there's an error in the code, and in that case any
attempt to recover is futile. It turns out that the thread does fail
recoverably in one notable case: when running in the non-threaded RTS,
registerDelay fails immediately. And we probably still wish for xmobar
to support the non-threaded RTS.
One way to solve this issue is to add a bunch of #ifdefs and compile the
code only in the threaded case. This would double the number of
configurations that need to be tested, though.
Instead, let's make the code robust against all kinds of exceptions in
the timer coordination thread, and get non-threaded RTS support for
free.
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xmobar currently runs every monitor in its own thread. Monitors that do
periodic updates simply sleep and loop. This unfortunately leads to
these threads coming out of sync, and xmobar ends up waking up and
redrawing for every periodic monitor. In my case, that is 7 times per
second, which is enough for xmobar to be at the top of "top" with more
than 1% CPU usage, and to have a noticeable impact on battery life.
This commit adds a central timer coordination thread which makes sure
that periodic updates happen together and that we only redraw once
they're all done.
Together with PR #409, I managed to lower the idle power draw of my
laptop from 4W to 3W.
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This reverts commit 1f1f0bd8b811740c84215f9ed4fa5ebd8309a990.
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This reverts commit efb6d6817c092fe08e9b0f1b8a17bddd29d97cdb.
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