X11::Protocol::Ext::X_Resource(3)
NAME
X11::Protocol::Ext::X_Resource - server resource usage
SYNOPSIS
use X11::Protocol;
my $X = X11::Protocol->new;
$X->init_extension('X-Resource')
or print "X-Resource extension not available";
my @clients = $X->XResourceQueryClients();
my %resources = $X->XResourceQueryClientResources ($client_xid);
my $bytes = $X->XResourceQueryClientPixmapBytes ($client_xid);
DESCRIPTION
The X-Resource extension gives some server resource utilization
information, mainly for use as diagnostics.
o Current client connections and their XID ranges.
o How many windows, pixmaps, GCs, etc in use by a given client.
o Total memory used by all the pixmaps of a given client.
"Resources" here means memory, objects, etc, not to be confused with
the resource database of user preferences and widget settings of
"RESOURCES" in X(7).
See examples/xresource-print.pl for a simple dump of the resources
reported.
REQUESTS
The following requests are made available with an "init_extension()",
as per "EXTENSIONS" in X11::Protocol.
my $is_available = $X->init_extension('X-Resource');
"($server_major, $server_minor) = $X->XResourceQueryVersion
($client_major, $client_minor)"
Negotiate the extension version. $client_major and $client_minor
is what the client would like, the returned $server_major and
$server_minor is what the server will do, which might be lower than
requested (but not higher).
The current code supports X-Resource 1.0. The intention is for
this module to automatically negotiate in "$X->init_extension()"
if/when needed.
"@clients = $X->XResourceQueryClients ()"
Return a list of client connections on the server. Each returned
value is an arrayref pair
[ $xid_base, $xid_mask ]
$xid_base (an integer) is the start of XIDs for the client.
$xid_mask (an integer) is a bit mask for the XIDs above that base
which the client may use. For example $xid_base might be 0xA00000
and $xid_mask 0x1FFFFF, meaning 0xA00000 through 0xBFFFFF is this
client.
my @clients = $X->XResourceQueryClients;
print "there are ",scalar(@clients)," clients\n";
foreach my $aref (@clients) {
my $xid_base = $aref->[0];
my $xid_mask = $aref->[1];
printf "client base %X mask %X\n", $xid_base, $xid_mask;
}
The given $X connection itself is included in the return. Its base
and mask are per "$X->{'resource_id_base'}" and
"$X->{'resource_id_mask'}".
"($atom,$count,...) = $X->XResourceQueryClientResources ($xid)"
Return a list of how many of various server things are used by a
given client.
The client is identified by an $xid. It can be anything in the
client's XID range and doesn't have to be currently allocated or
created. For example to enquire about the current client use
"$X->{'resource_id_base'}".
The return is a list of resource type (an atom integer) and count
of those things,
($atom, $count, $atom, $count, ...)
So for example to print all resources,
my @res = $X->XResourceQueryClientResources ($xid);
while (@res) {
my $type_atom = shift @res;
my $count = shift @res;
my $type_name = $X->atom_name($type_atom);
printf "type $type_name count $count\n";
}
Or put the list into a hash to lookup a particular resource type,
my %res = $X->XResourceQueryClientResources ($xid);
my $window_atom = X11::AtomConstants::WINDOW();
my $windows = $res{$window_atom} || 0;
my $grab_atom = $X->atom('PASSIVE GRAB');
my $grabs = $res{$grab_atom} || 'no';
print "using $windows many windows, and $grabs passive grabs";
"List::Pairwise" has "mapp()" and other things to work with this
sort of two-at-a-time list. See examples/xresource-pairwise.pl for
a complete program.
Generally a count entry is only present when the client has 1 or
more of the thing. So if no pixmaps then no "PIXMAP" entry at all.
Basics like "WINDOW", "PIXMAP", "GC" "COLORMAP", "FONT" and
"CURSOR" are how many of those in use. The server might also
report things like "PASSIVEA GRAB" or "COLORMAPA ENTRY" (atoms with
spaces in their names). The X.org server (circa version 1.9) even
sometimes reports things like "Unregistered resource 30" (an atom
with that name), which is something or other.
If the given $xid is not a connected client then a "BadValue" error
results. Be careful of that when querying resources of another
client since the client might disconnect at any time.
"$X->robust_req()" is good, or maybe "GrabServer" to hold
connections between "XResourceQueryClients()" and
"XResourceQueryClientResources()".
"$bytes = $X->XResourceQueryClientPixmapBytes ($xid)"
Return the total bytes of memory on the server used by all the
pixmaps of a given client. Pixmaps which only exist as window
backgrounds or GC tiles or stipples are included, or should be. If
the client has no pixmaps at all the return is 0.
The client is identified by an $xid as per
"XResourceQueryClientResources()" above. It can be anything in the
client's XID range, allocated or not.
my $pixmap = $X->new_rsrc;
$X->CreatePixmap ($pixmap,
$X->{'root'},
$X->{'root_depth'},
100, 100); # width,height
my $xid = $X->{'resource_id_base'}; # own usage
my $bytes = $X->XResourceQueryClientPixmapBytes ($xid);
print "total of all pixmaps is $bytes bytes of memory\n";
The return is a 64-bit value. On a 32-bit Perl a bigger than 32
bits is returned as floating point, or bigger than 53 bit float as
"Math::BigInt". Most of the time 32 bits is enough, since that
would be 4 Gbytes of pixmaps, and or 53-bit float should be plenty,
that being about 8192 terabytes!
For reference, the X.org server circa version 1.11.4 had a bug
where it didn't count space used by pixmaps of depth less than 8
(including depth 1 bitmaps) in the bytes returned.
SEE ALSO
X11::Protocol(3), X11::AtomConstants(3)
X.org server source code
"http://cgit.freedesktop.org/xorg/xserver/tree/Xext/xres.c"
xrestop(1)
HOME PAGE
<http://user42.tuxfamily.org/x11-protocol-other/index.html>
LICENSE
Copyright 2011, 2012, 2013, 2014, 2017 Kevin Ryde
X11-Protocol-Other is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 3, or (at
your option) any later version.
X11-Protocol-Other is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License along
with X11-Protocol-Other. If not, see <http://www.gnu.org/licenses/>.
perl v5.28.1 2017-01-20 X11::Protocol::Ext::X_Resource(3)
x11-protocol-other 30 - Generated Mon Feb 18 18:23:44 CST 2019