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perf pmu: Expand PMU events by prefix match

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When the user specifies a pmu directly, expand it automatically with a
prefix match for all available PMUs, similar as we do for the normal
aliases now.

This allows to specify attributes for duplicated boxes quickly.  For
example uncore_cbox_{0,6}/.../ can be now specified as uncore_cbox/.../
and it gets automatically expanded for all boxes.

This generally makes it more concise to write uncore specifications, and
also avoids the need to know the exact topology of the system.

Before:

  % perf stat -a -e uncore_cbox_0/event=0x35,umask=0x1,filter_opc=0x19C/,\
  uncore_cbox_1/event=0x35,umask=0x1,filter_opc=0x19C/,\
  uncore_cbox_2/event=0x35,umask=0x1,filter_opc=0x19C/,\
  uncore_cbox_3/event=0x35,umask=0x1,filter_opc=0x19C/,\
  uncore_cbox_4/event=0x35,umask=0x1,filter_opc=0x19C/,\
  uncore_cbox_5/event=0x35,umask=0x1,filter_opc=0x19C/ sleep 1

After:

  % perf stat -a -e uncore_cbox/event=0x35,umask=0x1,filter_opc=0x19C/ sleep 1

v2: Handle all bison rules. Move multi add code to separate function.
    Handle uncore_ prefix correctly.
v3: Move parse_events_multi_pmu_add to separate patch. Move uncore
    prefix check to separate patch.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Link: http://lkml.kernel.org/r/20170320201711.14142-6-andi@firstfloor.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Andi Kleen
2017-03-20 13:17:03 -07:00
committed by Arnaldo Carvalho de Melo
parent 2073ad3326
commit 8255718f4b
3 changed files with 54 additions and 14 deletions
Download Patch File Download Diff File Expand all files Collapse all files

25
tools/perf/util/parse-events.c
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@@ -2462,6 +2462,31 @@ int parse_events_term__clone(struct parse_events_term **new,
return new_term(new, &temp, term->val.str, term->val.num);
}
int parse_events_copy_term_list(struct list_head *old,
struct list_head **new)
{
struct parse_events_term *term, *n;
int ret;
if (!old) {
*new = NULL;
return 0;
}
*new = malloc(sizeof(struct list_head));
if (!*new)
return -ENOMEM;
INIT_LIST_HEAD(*new);
list_for_each_entry (term, old, list) {
ret = parse_events_term__clone(&n, term);
if (ret)
return ret;
list_add_tail(&n->list, *new);
}
return 0;
}
void parse_events_terms__purge(struct list_head *terms)
{
struct parse_events_term *term, *h;