tools/perf/scripts/perl/Perf-Trace-Util/lib/Perf/Trace/Util.pm
Source file repositories/reference/linux-study-clean/tools/perf/scripts/perl/Perf-Trace-Util/lib/Perf/Trace/Util.pm
File Facts
- System
- Linux kernel
- Corpus path
tools/perf/scripts/perl/Perf-Trace-Util/lib/Perf/Trace/Util.pm- Extension
.pm- Size
- 1515 bytes
- Lines
- 95
- Domain
- Support Tooling And Documentation
- Bucket
- tools
- Inferred role
- Support Tooling And Documentation: tools
- Status
- atlas-only
Why This File Exists
Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.
- Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.
Dependency Surface
- No C-style include directives detected by the generator.
Detected Declarations
- No top-level syscall, struct, function, initcall, or export declaration detected by the generator.
Annotated Snippet
package Perf::Trace::Util;
use 5.010000;
use strict;
use warnings;
require Exporter;
our @ISA = qw(Exporter);
our %EXPORT_TAGS = ( 'all' => [ qw(
) ] );
our @EXPORT_OK = ( @{ $EXPORT_TAGS{'all'} } );
our @EXPORT = qw(
avg nsecs nsecs_secs nsecs_nsecs nsecs_usecs print_nsecs
clear_term
);
our $VERSION = '0.01';
sub avg
{
my ($total, $n) = @_;
return $total / $n;
}
my $NSECS_PER_SEC = 1000000000;
sub nsecs
{
my ($secs, $nsecs) = @_;
return $secs * $NSECS_PER_SEC + $nsecs;
}
sub nsecs_secs {
my ($nsecs) = @_;
return $nsecs / $NSECS_PER_SEC;
}
sub nsecs_nsecs {
my ($nsecs) = @_;
return $nsecs % $NSECS_PER_SEC;
}
sub nsecs_str {
my ($nsecs) = @_;
my $str = sprintf("%5u.%09u", nsecs_secs($nsecs), nsecs_nsecs($nsecs));
return $str;
}
sub clear_term
{
print "\x1b[H\x1b[2J";
}
1;
__END__
=head1 NAME
Perf::Trace::Util - Perl extension for perf script
=head1 SYNOPSIS
Annotation
- Atlas domain: Support Tooling And Documentation / tools.
- Implementation status: atlas-only.
Implementation Notes
- This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
- Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
- Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.