From e09b41010ba33a20a87472ee821fa407a5b8da36 Mon Sep 17 00:00:00 2001 From: José Pekkarinen Date: Mon, 11 Apr 2016 10:41:07 +0300 Subject: These changes are the raw update to linux-4.4.6-rt14. Kernel sources are taken from kernel.org, and rt patch from the rt wiki download page. MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit During the rebasing, the following patch collided: Force tick interrupt and get rid of softirq magic(I70131fb85). Collisions have been removed because its logic was found on the source already. Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769 Signed-off-by: José Pekkarinen --- kernel/scripts/stackdelta | 59 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 59 insertions(+) create mode 100755 kernel/scripts/stackdelta (limited to 'kernel/scripts/stackdelta') diff --git a/kernel/scripts/stackdelta b/kernel/scripts/stackdelta new file mode 100755 index 000000000..48eabf2f4 --- /dev/null +++ b/kernel/scripts/stackdelta @@ -0,0 +1,59 @@ +#!/usr/bin/perl + +# Read two files produced by the stackusage script, and show the +# delta between them. +# +# Currently, only shows changes for functions listed in both files. We +# could add an option to show also functions which have vanished or +# appeared (which would often be due to gcc making other inlining +# decisions). +# +# Another possible option would be a minimum absolute value for the +# delta. +# +# A third possibility is for sorting by delta, but that can be +# achieved by piping to sort -k5,5g. + +sub read_stack_usage_file { + my %su; + my $f = shift; + open(my $fh, '<', $f) + or die "cannot open $f: $!"; + while (<$fh>) { + chomp; + my ($file, $func, $size, $type) = split; + # Old versions of gcc (at least 4.7) have an annoying quirk in + # that a (static) function whose name has been changed into + # for example ext4_find_unwritten_pgoff.isra.11 will show up + # in the .su file with a name of just "11". Since such a + # numeric suffix is likely to change across different + # commits/compilers/.configs or whatever else we're trying to + # tweak, we can't really track those functions, so we just + # silently skip them. + # + # Newer gcc (at least 5.0) report the full name, so again, + # since the suffix is likely to change, we strip it. + next if $func =~ m/^[0-9]+$/; + $func =~ s/\..*$//; + # Line numbers are likely to change; strip those. + $file =~ s/:[0-9]+$//; + $su{"${file}\t${func}"} = {size => $size, type => $type}; + } + close($fh); + return \%su; +} + +@ARGV == 2 + or die "usage: $0 "; + +my $old = read_stack_usage_file($ARGV[0]); +my $new = read_stack_usage_file($ARGV[1]); +my @common = sort grep {exists $new->{$_}} keys %$old; +for (@common) { + my $x = $old->{$_}{size}; + my $y = $new->{$_}{size}; + my $delta = $y - $x; + if ($delta) { + printf "%s\t%d\t%d\t%+d\n", $_, $x, $y, $delta; + } +} -- cgit 1.2.3-korg