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# You may distribute under the terms of either the GNU General Public License |
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# or the Artistic License (the same terms as Perl itself) |
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# |
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# (C) Paul Evans, 2010-2011 -- leonerd@leonerd.org.uk |
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package IO::Socket::Netlink::Taskstats; |
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use strict; |
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use warnings; |
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use base qw( IO::Socket::Netlink::Generic ); |
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our $VERSION = '0.03'; |
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use Carp; |
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use Socket::Netlink qw( :DEFAULT ); |
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use Socket::Netlink::Taskstats; |
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__PACKAGE__->register_family_name( "TASKSTATS" ); |
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=head1 NAME |
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C - Object interface to C generic |
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netlink protocol sockets |
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=head1 SYNOPSIS |
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use IO::Socket::Netlink::Taskstats; |
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my $sock = IO::Socket::Netlink::Taskstats->new; |
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my $stats = $sock->get_process_info_by_pid( $$ ); |
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printf "So far, %s has consumed %d usec in userland and %d in kernel\n", |
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$stats->{ac_comm}, |
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$stats->{ac_utime}, |
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$stats->{ac_stime}; |
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=head1 DESCRIPTION |
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This subclass of L implements the C |
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generic netlink protocol. This protocol allows detailed statistics gathering |
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of resource usage on a per-process basis, and notification of resources used |
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by processes at the time they exit. |
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This module is currently a work-in-progress, and this documentation is fairly |
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minimal. The reader is expected to be familiar with C, only a |
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fairly minimal description of the Perl-level wrapping is given here. |
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=cut |
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=head1 METHODS |
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=cut |
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sub message_class |
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{ |
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return "IO::Socket::Netlink::Taskstats::_Message"; |
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} |
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sub command_class |
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{ |
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return "IO::Socket::Netlink::Taskstats::_Command"; |
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} |
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sub _get_process_info |
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{ |
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my $self = shift; |
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my %searchattrs = @_; |
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$self->send_nlmsg( $self->new_command( |
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cmd => CMD_GET, |
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nlattrs => \%searchattrs, |
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) ) or croak "Cannot send - $!"; |
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$self->recv_nlmsg( my $message, 32768 ) or |
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croak "Cannot recv - $!"; |
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return $message->nlattrs; |
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} |
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=head2 $info = $sock->get_process_info_by_pid( $pid ) |
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Returns an information structure containing the statistics about the process |
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with the given PID. |
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87
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=cut |
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sub get_process_info_by_pid |
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{ |
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my $self = shift; |
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my ( $pid ) = @_; |
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return $self->_get_process_info( pid => $pid )->{aggr_pid}{stats}; |
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} |
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=head2 $sock->register_cpumask( $mask ) |
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=head2 $sock->deregister_cpumask( $mask ) |
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Register or deregister this socket to receive process exit notifications, for |
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processes exiting on CPUs given by the C<$mask>. |
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=cut |
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sub register_cpumask |
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{ |
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my $self = shift; |
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my ( $mask ) = @_; |
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$self->send_nlmsg( $self->new_command( |
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cmd => CMD_GET, |
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nlattrs => { |
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register_cpumask => $mask, |
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}, |
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) ); |
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0
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$self->recv_nlmsg( my $message, 32768 ) or |
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croak "Cannot recv - $!"; |
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0
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( $! = $message->nlerr_error ) and croak "Received NLMSG_ERROR - $!"; |
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} |
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122
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sub deregister_cpumask |
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{ |
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my $self = shift; |
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my ( $mask ) = @_; |
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0
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$self->send_nlmsg( $self->new_command( |
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cmd => CMD_GET, |
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nlattrs => { |
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deregister_cpumask => $mask, |
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}, |
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) ); |
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0
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$self->recv_nlmsg( my $message, 32768 ) or |
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croak "Cannot recv - $!"; |
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0
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( $! = $message->nlerr_error ) and croak "Received NLMSG_ERROR - $!"; |
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} |
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139
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=head1 MESSAGE OBJECTS |
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=cut |
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143
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package IO::Socket::Netlink::Taskstats::_Message; |
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145
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use base qw( IO::Socket::Netlink::Generic::_Message ); |
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3
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1222
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use Socket::Netlink::Taskstats qw( :DEFAULT ); |
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5
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698
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148
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149
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=pod |
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151
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Provides the following netlink attributes |
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=over 4 |
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=item * pid => INT |
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157
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=item * tgid => INT |
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159
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=item * stats => HASH |
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161
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=item * aggr_pid => HASH |
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163
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=item * aggr_tgid => HASH |
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165
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=back |
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167
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=cut |
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169
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__PACKAGE__->has_nlattrs( |
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"genlmsg", |
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pid => [ TYPE_PID, "u32" ], |
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tgid => [ TYPE_TGID, "u32" ], |
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stats => [ TYPE_STATS, "stats" ], |
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aggr_pid => [ TYPE_AGGR_PID, "nested" ], |
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aggr_tgid => [ TYPE_AGGR_TGID, "nested" ], |
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); |
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178
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0
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sub pack_nlattr_stats { pack_taskstats $_[1] } |
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sub unpack_nlattr_stats { unpack_taskstats $_[1] } |
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181
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package IO::Socket::Netlink::Taskstats::_Command; |
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183
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10
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use base qw( IO::Socket::Netlink::Generic::_Message ); |
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2
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2
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1164
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185
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2
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use Socket::Netlink::Taskstats qw( :DEFAULT ); |
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3
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2
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470
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186
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187
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__PACKAGE__->has_nlattrs( |
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"genlmsg", |
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pid => [ CMD_ATTR_PID, "u32" ], |
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tgid => [ CMD_ATTR_TGID, "u32" ], |
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register_cpumask => [ CMD_ATTR_REGISTER_CPUMASK, "raw" ], |
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deregister_cpumask => [ CMD_ATTR_DEREGISTER_CPUMASK, "raw" ], |
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); |
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195
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=head1 SEE ALSO |
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197
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=over 4 |
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199
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=item * |
200
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201
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L - interface to Linux's C generic |
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netlink socket protocol |
203
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204
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=item * |
205
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206
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L - Object interface to C domain sockets |
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208
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=back |
209
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210
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=head1 AUTHOR |
211
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212
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Paul Evans |
213
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214
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=cut |
215
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216
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0x55AA; |