GNU bug report logs - #41150
[PATCH] gnu: Add powerstat.

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Tobias Geerinckx-Rice <me <at> tobias.gr>
Subject: bug#41150: closed (Re: [bug#41150] [PATCH] gnu: Add powerstat.)
Date: Sat, 09 May 2020 20:43:01 +0000

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Your bug report

#41150: [PATCH] gnu: Add powerstat.

which was filed against the guix-patches package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 41150 <at> debbugs.gnu.org.

-- 
41150: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=41150
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

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From: Tobias Geerinckx-Rice <me <at> tobias.gr>
To: Mathieu Othacehe <othacehe <at> gnu.org>
Cc: 41150-done <at> debbugs.gnu.org
Subject: Re: [bug#41150] [PATCH] gnu: Add powerstat.
Date: Sat, 09 May 2020 22:42:25 +0200

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Mathieu again,

Mathieu Othacehe 写道：
> Hard-coding CC this way will prevent cross-compilation. You can 
> have a
> look to "crda" or "libaio" for examples.

Do you happen to know why libaio specifies the full path to gcc 
(only) when cross-compiling?  I didn't bother modifying it to 
test.

I cross-built powerstat for aarch64 on my laptop (then ran it by 
accident -- modern GNU/Linux is mad).  I'm not restricting 
platforms (yet) since my knowledge of ACPI support outside of x86 
does not exist.

Pushed as 510a8eb1b8b4f2686606e427b8965c126b81ed8a.

Thanks!

T G-R

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From: Tobias Geerinckx-Rice <me <at> tobias.gr>
To: guix-patches <at> gnu.org
Subject: [PATCH] gnu: Add powerstat.
Date: Sat,  9 May 2020 17:15:09 +0200

* gnu/packages/linux.scm (powerstat): New public variable.
---
 gnu/packages/linux.scm | 44 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 44 insertions(+)

diff --git a/gnu/packages/linux.scm b/gnu/packages/linux.scm
index d2bffe8d8c..0d558f0277 100644
--- a/gnu/packages/linux.scm
+++ b/gnu/packages/linux.scm
@@ -1195,7 +1195,50 @@ at login.  Local and dynamic reconfiguration are its key features.")
 ;;; Miscellaneous.
 ;;;
 
+(define-public powerstat
+  (package
+    (name "powerstat")
+    (version "0.02.22")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append "https://kernel.ubuntu.com/~cking/tarballs/"
+                           "powerstat/powerstat-" version ".tar.gz"))
+       (sha256
+        (base32 "0r355b9syqa2nhfy8ksvxyy5d58v0isf983842js091s6liy0x7g"))))
+    (build-system gnu-build-system)
+    (arguments
+     `(#:make-flags
+       (list "CC=gcc"
+             (string-append "prefix=" (assoc-ref %outputs "out")))
+       #:tests? #f                      ; no test suite
+       #:phases
+       (modify-phases %standard-phases
+         (add-after 'unpack 'respect-$prefix
+           ;; https://bugs.launchpad.net/ubuntu/+source/powerstat/+bug/1877744
+           (lambda _
+             (substitute* "Makefile"
+               (("DIR=/usr/") "DIR=$(prefix)/"))
+             #t))
+         (delete 'configure))))         ; no configure script
+    (home-page "https://kernel.ubuntu.com/~cking/powerstat/")
+    (synopsis "Measure system power consumption")
+    (description
+     "Powerstat measures and reports your computer's power consumption in real
+time.  On mobile PCs, it uses ACPI battery information to measure the power
+drain of the entire system.
+
+Powerstat can also report @acronym{RAPL, Running Average Power Limit} power
+domain measurements.  These are available only on some hardware such as Intel
+Sandybridge and newer, and cover only part of the machine's components such as
+CPU, DRAM, and graphics.  However, they provide accurate and immediate readings
+and don't require a battery at all.
+
+The output is like @command{vmstat} but also shows power consumption statistics:
+at the end of a run, @command{powerstat} will calculate the average, standard
+deviation, and minimum and maximum values.  It can show a nice histogram too.")
+    (license license:gpl2)))
+
 (define-public psmisc
   (package
     (name "psmisc")
-- 
2.26.2

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