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authorScott Wood <swood@redhat.com>2017-07-16 19:16:30 -0500
committerSteven Rostedt (VMware) <rostedt@goodmis.org>2018-04-06 14:05:13 -0400
commita9adc261e978b9214fd505030c24e75b07dcf52f (patch)
tree1cac90d4e88fa17d6355997ac914a70c062d15d9 /tools/testing/ktest
parentktest: Add standalone config-bisect.pl program (diff)
downloadlinux-dev-a9adc261e978b9214fd505030c24e75b07dcf52f.tar.xz
linux-dev-a9adc261e978b9214fd505030c24e75b07dcf52f.zip
ktest: Use config-bisect.pl in ktest.pl
Reduce code duplication and take advantage of bisection logic improvements by calling config-bisect.pl. The output of make oldconfig is now copied directly to the desired file, rather than doing assign_configs+save_config, in order to preserve the ordering so that diffing the configs at the end will provide useful output. Link: http://lkml.kernel.org/r/20170717001630.10518-8-swood@redhat.com Signed-off-by: Scott Wood <swood@redhat.com> [ Modified to use with new version of config-bisect.pl ] Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'tools/testing/ktest')
-rwxr-xr-xtools/testing/ktest/ktest.pl264
1 files changed, 42 insertions, 222 deletions
diff --git a/tools/testing/ktest/ktest.pl b/tools/testing/ktest/ktest.pl
index f597f9b4e8d5..ad00ce699749 100755
--- a/tools/testing/ktest/ktest.pl
+++ b/tools/testing/ktest/ktest.pl
@@ -3092,76 +3092,6 @@ sub create_config {
make_oldconfig;
}
-# compare two config hashes, and return configs with different vals.
-# It returns B's config values, but you can use A to see what A was.
-sub diff_config_vals {
- my ($pa, $pb) = @_;
-
- # crappy Perl way to pass in hashes.
- my %a = %{$pa};
- my %b = %{$pb};
-
- my %ret;
-
- foreach my $item (keys %a) {
- if (defined($b{$item}) && $b{$item} ne $a{$item}) {
- $ret{$item} = $b{$item};
- }
- }
-
- return %ret;
-}
-
-# compare two config hashes and return the configs in B but not A
-sub diff_configs {
- my ($pa, $pb) = @_;
-
- my %ret;
-
- # crappy Perl way to pass in hashes.
- my %a = %{$pa};
- my %b = %{$pb};
-
- foreach my $item (keys %b) {
- if (!defined($a{$item})) {
- $ret{$item} = $b{$item};
- }
- }
-
- return %ret;
-}
-
-# return if two configs are equal or not
-# 0 is equal +1 b has something a does not
-# +1 if a and b have a different item.
-# -1 if a has something b does not
-sub compare_configs {
- my ($pa, $pb) = @_;
-
- my %ret;
-
- # crappy Perl way to pass in hashes.
- my %a = %{$pa};
- my %b = %{$pb};
-
- foreach my $item (keys %b) {
- if (!defined($a{$item})) {
- return 1;
- }
- if ($a{$item} ne $b{$item}) {
- return 1;
- }
- }
-
- foreach my $item (keys %a) {
- if (!defined($b{$item})) {
- return -1;
- }
- }
-
- return 0;
-}
-
sub run_config_bisect_test {
my ($type) = @_;
@@ -3174,166 +3104,49 @@ sub run_config_bisect_test {
return $ret;
}
-sub process_failed {
- my ($config) = @_;
+sub config_bisect_end {
+ my ($good, $bad) = @_;
doprint "\n\n***************************************\n";
- doprint "Found bad config: $config\n";
+ doprint "No more config bisecting possible.\n";
+ doprint `diff -u $good $bad`;
doprint "***************************************\n\n";
}
-# used for config bisecting
-my $good_config;
-my $bad_config;
-
-sub process_new_config {
- my ($tc, $nc, $gc, $bc) = @_;
-
- my %tmp_config = %{$tc};
- my %good_configs = %{$gc};
- my %bad_configs = %{$bc};
-
- my %new_configs;
-
- my $runtest = 1;
- my $ret;
-
- create_config "tmp_configs", \%tmp_config;
- assign_configs \%new_configs, $output_config;
-
- $ret = compare_configs \%new_configs, \%bad_configs;
- if (!$ret) {
- doprint "New config equals bad config, try next test\n";
- $runtest = 0;
- }
-
- if ($runtest) {
- $ret = compare_configs \%new_configs, \%good_configs;
- if (!$ret) {
- doprint "New config equals good config, try next test\n";
- $runtest = 0;
- }
- }
-
- %{$nc} = %new_configs;
-
- return $runtest;
-}
-
sub run_config_bisect {
- my ($pgood, $pbad) = @_;
-
- my $type = $config_bisect_type;
-
- my %good_configs = %{$pgood};
- my %bad_configs = %{$pbad};
-
- my %diff_configs = diff_config_vals \%good_configs, \%bad_configs;
- my %b_configs = diff_configs \%good_configs, \%bad_configs;
- my %g_configs = diff_configs \%bad_configs, \%good_configs;
-
- my @diff_arr = keys %diff_configs;
- my $len_diff = $#diff_arr + 1;
-
- my @b_arr = keys %b_configs;
- my $len_b = $#b_arr + 1;
-
- my @g_arr = keys %g_configs;
- my $len_g = $#g_arr + 1;
-
- my $runtest = 1;
- my %new_configs;
+ my ($good, $bad, $last_result) = @_;
+ my $cmd;
my $ret;
- # First, lets get it down to a single subset.
- # Is the problem with a difference in values?
- # Is the problem with a missing config?
- # Is the problem with a config that breaks things?
-
- # Enable all of one set and see if we get a new bad
- # or good config.
-
- # first set the good config to the bad values.
-
- doprint "d=$len_diff g=$len_g b=$len_b\n";
-
- # first lets enable things in bad config that are enabled in good config
-
- if ($len_diff > 0) {
- if ($len_b > 0 || $len_g > 0) {
- my %tmp_config = %bad_configs;
-
- doprint "Set tmp config to be bad config with good config values\n";
- foreach my $item (@diff_arr) {
- $tmp_config{$item} = $good_configs{$item};
- }
-
- $runtest = process_new_config \%tmp_config, \%new_configs,
- \%good_configs, \%bad_configs;
- }
- }
-
- if (!$runtest && $len_diff > 0) {
-
- if ($len_diff == 1) {
- process_failed $diff_arr[0];
- return 1;
- }
- my %tmp_config = %bad_configs;
-
- my $half = int($#diff_arr / 2);
- my @tophalf = @diff_arr[0 .. $half];
-
- doprint "Settings bisect with top half:\n";
- doprint "Set tmp config to be bad config with some good config values\n";
- foreach my $item (@tophalf) {
- $tmp_config{$item} = $good_configs{$item};
- }
-
- $runtest = process_new_config \%tmp_config, \%new_configs,
- \%good_configs, \%bad_configs;
-
- if (!$runtest) {
- my %tmp_config = %bad_configs;
-
- doprint "Try bottom half\n";
-
- my @bottomhalf = @diff_arr[$half+1 .. $#diff_arr];
-
- foreach my $item (@bottomhalf) {
- $tmp_config{$item} = $good_configs{$item};
- }
+ run_command "$builddir/tools/testing/ktest/config-bisect.pl -b $outputdir $good $bad $last_result";
- $runtest = process_new_config \%tmp_config, \%new_configs,
- \%good_configs, \%bad_configs;
- }
+ # config-bisect returns:
+ # 0 if there is more to bisect
+ # 1 for finding a good config
+ # 2 if it can not find any more configs
+ # -1 (255) on error
+ if ($run_command_status) {
+ return $run_command_status;
}
- if ($runtest) {
- $ret = run_config_bisect_test $type;
- if ($ret) {
- doprint "NEW GOOD CONFIG\n";
- %good_configs = %new_configs;
- run_command "mv $good_config ${good_config}.last";
- save_config \%good_configs, $good_config;
- %{$pgood} = %good_configs;
- } else {
- doprint "NEW BAD CONFIG\n";
- %bad_configs = %new_configs;
- run_command "mv $bad_config ${bad_config}.last";
- save_config \%bad_configs, $bad_config;
- %{$pbad} = %bad_configs;
- }
- return 0;
+ $ret = run_config_bisect_test $config_bisect_type;
+ if ($ret) {
+ doprint "NEW GOOD CONFIG\n";
+ # Return 3 for good config
+ return 3;
+ } else {
+ doprint "NEW BAD CONFIG\n";
+ # Return 4 for bad config
+ return 4;
}
-
- fail "Hmm, need to do a mix match?\n";
- return -1;
}
sub config_bisect {
my ($i) = @_;
+ my $good_config;
+ my $bad_config;
+
my $type = $config_bisect_type;
my $ret;
@@ -3364,18 +3177,14 @@ sub config_bisect {
doprint "Run good configs through make oldconfig\n";
assign_configs \%tmp_configs, $good_config;
create_config "$good_config", \%tmp_configs;
- assign_configs \%good_configs, $output_config;
+ $good_config = "$tmpdir/good_config";
+ system("cp $output_config $good_config") == 0 or dodie "cp good config";
doprint "Run bad configs through make oldconfig\n";
assign_configs \%tmp_configs, $bad_config;
create_config "$bad_config", \%tmp_configs;
- assign_configs \%bad_configs, $output_config;
-
- $good_config = "$tmpdir/good_config";
$bad_config = "$tmpdir/bad_config";
-
- save_config \%good_configs, $good_config;
- save_config \%bad_configs, $bad_config;
+ system("cp $output_config $bad_config") == 0 or dodie "cp bad config";
if (defined($config_bisect_check) && $config_bisect_check ne "0") {
if ($config_bisect_check ne "good") {
@@ -3398,10 +3207,21 @@ sub config_bisect {
}
}
+ my $last_run = "";
+
do {
- $ret = run_config_bisect \%good_configs, \%bad_configs;
+ $ret = run_config_bisect $good_config, $bad_config, $last_run;
+ if ($ret == 3) {
+ $last_run = "good";
+ } elsif ($ret == 4) {
+ $last_run = "bad";
+ }
print_times;
- } while (!$ret);
+ } while ($ret == 3 || $ret == 4);
+
+ if ($ret == 2) {
+ config_bisect_end "$good_config.tmp", "$bad_config.tmp";
+ }
return $ret if ($ret < 0);