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    Subject[PATCH -tip 4/8] perf probe: Remove event suffix number _0
    Date
    Remove event suffix number _0 if it is the first.
    The first event has no suffix, and from the second,
    each event has suffix number counted from _1. This
    reduces typing cost :-).

    Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
    Cc: Ingo Molnar <mingo@elte.hu>
    Cc: Steven Rostedt <rostedt@goodmis.org>
    Cc: Jim Keniston <jkenisto@us.ibm.com>
    Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
    Cc: Christoph Hellwig <hch@infradead.org>
    Cc: Frank Ch. Eigler <fche@redhat.com>
    Cc: Frederic Weisbecker <fweisbec@gmail.com>
    Cc: Jason Baron <jbaron@redhat.com>
    Cc: K.Prasad <prasad@linux.vnet.ibm.com>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
    Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
    ---

    tools/perf/util/probe-event.c | 11 ++++++++++-
    1 files changed, 10 insertions(+), 1 deletions(-)

    diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c
    index 2c4d301..31beedc 100644
    --- a/tools/perf/util/probe-event.c
    +++ b/tools/perf/util/probe-event.c
    @@ -466,7 +466,16 @@ static void get_new_event_name(char *buf, size_t len, const char *base,
    struct strlist *namelist)
    {
    int i, ret;
    - for (i = 0; i < MAX_EVENT_INDEX; i++) {
    +
    + /* Try no suffix */
    + ret = e_snprintf(buf, len, "%s", base);
    + if (ret < 0)
    + die("snprintf() failed: %s", strerror(-ret));
    + if (!strlist__has_entry(namelist, buf))
    + return;
    +
    + /* Try to add suffix */
    + for (i = 1; i < MAX_EVENT_INDEX; i++) {
    ret = e_snprintf(buf, len, "%s_%d", base, i);
    if (ret < 0)
    die("snprintf() failed: %s", strerror(-ret));

    --
    Masami Hiramatsu

    Software Engineer
    Hitachi Computer Products (America), Inc.
    Software Solutions Division

    e-mail: mhiramat@redhat.com


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