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    Subject[PATCH] scripts/bootgraph.pl: ignore times until the clock is running
    Date
    The clock used for printk.time=1 does not necessarily start running
    from zero. On such platforms the bootgraph does not work properly as
    the calculated boottime will be too long.

    To correct this, the patch modifies the script to accept only non-zero
    start times. This ensures the report contains entries only from the
    period when the clock was running.

    Signed-off-by: Aaro Koskinen <aaro.koskinen@nokia.com>
    ---
    scripts/bootgraph.pl | 18 +++++++++++-------
    1 files changed, 11 insertions(+), 7 deletions(-)

    diff --git a/scripts/bootgraph.pl b/scripts/bootgraph.pl
    index 12caa82..ec57dd4 100644
    --- a/scripts/bootgraph.pl
    +++ b/scripts/bootgraph.pl
    @@ -44,7 +44,7 @@ my %end;
    my %type;
    my $done = 0;
    my $maxtime = 0;
    -my $firsttime = 100;
    +my $firsttime = undef;
    my $count = 0;
    my %pids;
    my %pidctr;
    @@ -54,10 +54,12 @@ while (<>) {
    if ($line =~ /([0-9\.]+)\] calling ([a-zA-Z0-9\_\.]+)\+/) {
    my $func = $2;
    if ($done == 0) {
    - $start{$func} = $1;
    + my $time = $1;
    + next unless $time =~ /[1-9]/;
    + $start{$func} = $time;
    $type{$func} = 0;
    - if ($1 < $firsttime) {
    - $firsttime = $1;
    + if (not defined $firsttime) {
    + $firsttime = $time;
    }
    }
    if ($line =~ /\@ ([0-9]+)/) {
    @@ -77,10 +79,12 @@ while (<>) {
    $func = "wait_" . $pid . "_" . $pidctr{$pid};
    }
    if ($done == 0) {
    - $start{$func} = $1;
    + my $time = $1;
    + next unless $time =~ /[1-9]/;
    + $start{$func} = $time;
    $type{$func} = 1;
    - if ($1 < $firsttime) {
    - $firsttime = $1;
    + if (not defined $firsttime) {
    + $firsttime = $time;
    }
    }
    $pids{$func} = $pid;
    --
    1.5.6.5


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