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processes: Put ChildProcess and ChildPID on separate lines. 

* guix/scripts/processes.scm (daemon-session->recutils): Put child
process information in separate fields.
* doc/guix.texi (Invoking guix processes): Document change in output of
'guix processes'.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>
master
John Soo 2020-11-12 21:16:48 -08:00 committed by Ludovic Courtès
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2 changed files with 17 additions and 11 deletions
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22
doc/guix.texi
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@ -84,6 +84,7 @@ Copyright @copyright{} 2020 André Batista@*
Copyright @copyright{} 2020 Alexandru-Sergiu Marton@*
Copyright @copyright{} 2020 raingloom@*
Copyright @copyright{} 2020 Daniel Brooks@*
Copyright @copyright{} 2020 John Soo@*
Permission is granted to copy, distribute and/or modify this document
under the terms of the GNU Free Documentation License, Version 1.3 or
@ -12865,9 +12866,12 @@ ClientCommand: cuirass --cache-directory /var/cache/cuirass @dots{}
LockHeld: /gnu/store/@dots{}-perl-ipc-cmd-0.96.lock
LockHeld: /gnu/store/@dots{}-python-six-bootstrap-1.11.0.lock
LockHeld: /gnu/store/@dots{}-libjpeg-turbo-2.0.0.lock
ChildProcess: 20495: guix offload x86_64-linux 7200 1 28800
ChildProcess: 27733: guix offload x86_64-linux 7200 1 28800
ChildProcess: 27793: guix offload x86_64-linux 7200 1 28800
ChildPID: 20495
ChildCommand: guix offload x86_64-linux 7200 1 28800
ChildPID: 27733
ChildCommand: guix offload x86_64-linux 7200 1 28800
ChildPID: 27793
ChildCommand: guix offload x86_64-linux 7200 1 28800
@end example
In this example we see that @command{guix-daemon} has three clients:
@ -12876,12 +12880,12 @@ integration tool; their process identifier (PID) is given by the
@code{ClientPID} field. The @code{SessionPID} field gives the PID of the
@command{guix-daemon} sub-process of this particular session.
The @code{LockHeld} fields show which store items are currently locked by this
session, which corresponds to store items being built or substituted (the
@code{LockHeld} field is not displayed when @command{guix processes} is not
running as root). Last, by looking at the @code{ChildProcess} field, we
understand that these three builds are being offloaded (@pxref{Daemon Offload
Setup}).
The @code{LockHeld} fields show which store items are currently locked
by this session, which corresponds to store items being built or
substituted (the @code{LockHeld} field is not displayed when
@command{guix processes} is not running as root). Last, by looking at
the @code{ChildPID} and @code{ChildCommand} fields, we understand that
these three builds are being offloaded (@pxref{Daemon Offload Setup}).
The output is in Recutils format so we can use the handy @command{recsel}
command to select sessions of interest (@pxref{Selection Expressions,,,

6
guix/scripts/processes.scm
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@ -1,5 +1,6 @@
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2018, 2019, 2020 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2020 John Soo <jsoo1@asu.edu>
;;;
;;; This file is part of GNU Guix.
;;;
@ -188,8 +189,9 @@ active sessions, and the master 'guix-daemon' process."
(format port "LockHeld: ~a~%" lock))
(daemon-session-locks-held session))
(for-each (lambda (process)
(format port "ChildProcess: ~a:~{ ~a~}~%"
(process-id process)
(format port "ChildPID: ~a~%"
(process-id process))
(format port "ChildCommand: :~{ ~a~}~%"
(process-command process)))
(daemon-session-children session)))