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    Subject[PATCH 3/5] perf report: Left align dynamic entries in hierarchy
    Date
    The dynamic entries are right-aligned unlike other entries since it
    usually has numeric value. But for the hierarchy mode, left alignment
    is more appropriate IMHO. Also trim spaces on the left so that we can
    easily identify the hierarchy.

    Before:

    $ perf report --hierarchy -i perf.data.kmem -s gfp_flags,ptr,bytes_req --stdio -g none
    ...
    #
    # Overhead gfp_flags / ptr / bytes_req
    # .............. .................................................................................................
    #
    91.67% GFP_ATOMIC|GFP_NOWARN|GFP_NOMEMALLOC
    37.50% 0xffff8803f7669400
    37.50% 448
    8.33% 0xffff8803f766be00
    8.33% 96
    4.17% 0xffff8800d156dc00
    4.17% 704

    After:

    # Overhead gfp_flags / ptr / bytes_req
    # .............. ....................................
    #
    91.67% GFP_ATOMIC|GFP_NOWARN|GFP_NOMEMALLOC
    37.50% 0xffff8803f7669400
    37.50% 448
    8.33% 0xffff8803f766be00
    8.33% 96
    4.17% 0xffff8800d156dc00
    4.17% 704

    Signed-off-by: Namhyung Kim <namhyung@kernel.org>
    ---
    tools/perf/ui/browsers/hists.c | 16 ++++++++++++++--
    tools/perf/ui/stdio/hist.c | 28 +++++++++++++++++++---------
    2 files changed, 33 insertions(+), 11 deletions(-)

    diff --git a/tools/perf/ui/browsers/hists.c b/tools/perf/ui/browsers/hists.c
    index 5f74c6723c53..5ffffcb1e3c5 100644
    --- a/tools/perf/ui/browsers/hists.c
    +++ b/tools/perf/ui/browsers/hists.c
    @@ -1400,8 +1400,13 @@ static int hist_browser__show_hierarchy_entry(struct hist_browser *browser,
    if (fmt->color) {
    width -= fmt->color(fmt, &hpp, entry);
    } else {
    + int i = 0;
    +
    width -= fmt->entry(fmt, &hpp, entry);
    - ui_browser__printf(&browser->b, "%s", s);
    + ui_browser__printf(&browser->b, "%s", ltrim(s));
    +
    + while (isspace(s[i++]))
    + width++;
    }
    }

    @@ -1576,6 +1581,8 @@ static int hists_browser__scnprintf_hierarchy_headers(struct hist_browser *brows
    return ret;

    hists__for_each_format(hists, fmt) {
    + char *start;
    +
    if (!perf_hpp__is_sort_entry(fmt) && !perf_hpp__is_dynamic_entry(fmt))
    continue;
    if (perf_hpp__should_skip(fmt, hists))
    @@ -1593,7 +1600,12 @@ static int hists_browser__scnprintf_hierarchy_headers(struct hist_browser *brows
    dummy_hpp.buf[ret] = '\0';
    rtrim(dummy_hpp.buf);

    - ret = strlen(dummy_hpp.buf);
    + start = ltrim(dummy_hpp.buf);
    + ret = strlen(start);
    +
    + if (start != dummy_hpp.buf)
    + memmove(dummy_hpp.buf, start, ret + 1);
    +
    if (advance_hpp_check(&dummy_hpp, ret))
    break;
    }
    diff --git a/tools/perf/ui/stdio/hist.c b/tools/perf/ui/stdio/hist.c
    index 5733d6c196be..6d06fbb365b6 100644
    --- a/tools/perf/ui/stdio/hist.c
    +++ b/tools/perf/ui/stdio/hist.c
    @@ -418,6 +418,7 @@ static int hist_entry__hierarchy_fprintf(struct hist_entry *he,
    const char *sep = symbol_conf.field_sep;
    struct perf_hpp_fmt *fmt;
    char *buf = hpp->buf;
    + size_t size = hpp->size;
    int ret, printed = 0;
    bool first = true;

    @@ -457,6 +458,11 @@ static int hist_entry__hierarchy_fprintf(struct hist_entry *he,
    (nr_sort_key - 1) * HIERARCHY_INDENT + 2, "");
    advance_hpp(hpp, ret);

    + printed += fprintf(fp, "%s", buf);
    +
    + hpp->buf = buf;
    + hpp->size = size;
    +
    /*
    * No need to call hist_entry__snprintf_alignment() since this
    * fmt is always the last column in the hierarchy mode.
    @@ -467,7 +473,11 @@ static int hist_entry__hierarchy_fprintf(struct hist_entry *he,
    else
    fmt->entry(fmt, hpp, he);

    - printed += fprintf(fp, "%s\n", buf);
    + /*
    + * dynamic entries are right-aligned but we want left-aligned
    + * in the hierarchy mode
    + */
    + printed += fprintf(fp, "%s\n", ltrim(buf));

    if (symbol_conf.use_callchain && he->leaf) {
    u64 total = hists__total_period(hists);
    @@ -525,6 +535,7 @@ static int print_hierarchy_header(struct hists *hists, struct perf_hpp *hpp,
    {
    bool first = true;
    int nr_sort;
    + int depth;
    unsigned width = 0;
    unsigned header_width = 0;
    struct perf_hpp_fmt *fmt;
    @@ -558,19 +569,16 @@ static int print_hierarchy_header(struct hists *hists, struct perf_hpp *hpp,
    if (!first)
    header_width += fprintf(fp, " / ");
    else {
    - header_width += fprintf(fp, "%s", sep ?: " ");
    + fprintf(fp, "%s", sep ?: " ");
    first = false;
    }

    fmt->header(fmt, hpp, hists_to_evsel(hists));
    rtrim(hpp->buf);

    - header_width += fprintf(fp, "%s", hpp->buf);
    + header_width += fprintf(fp, "%s", ltrim(hpp->buf));
    }

    - /* preserve max indent depth for combined sort headers */
    - print_hierarchy_indent(sep, nr_sort, spaces, fp);
    -
    fprintf(fp, "\n# ");

    /* preserve max indent depth for initial dots */
    @@ -590,6 +598,7 @@ static int print_hierarchy_header(struct hists *hists, struct perf_hpp *hpp,
    fprintf(fp, "%.*s", width, dots);
    }

    + depth = 0;
    hists__for_each_format(hists, fmt) {
    if (!perf_hpp__is_sort_entry(fmt) && !perf_hpp__is_dynamic_entry(fmt))
    continue;
    @@ -597,15 +606,16 @@ static int print_hierarchy_header(struct hists *hists, struct perf_hpp *hpp,
    continue;

    width = fmt->width(fmt, hpp, hists_to_evsel(hists));
    + width += depth * HIERARCHY_INDENT;
    +
    if (width > header_width)
    header_width = width;
    +
    + depth++;
    }

    fprintf(fp, "%s%-.*s", sep ?: " ", header_width, dots);

    - /* preserve max indent depth for dots under sort headers */
    - print_hierarchy_indent(sep, nr_sort, dots, fp);
    -
    fprintf(fp, "\n#\n");

    return 2;
    --
    2.7.1
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