perf evlist: Introduce 'disable' method

To remove the last case of access to the FD() macro outside the library.

Inspired by a patch by Borislav that moved the FD() macro to util.h, for
namespace concerns I rather preferred to constrain it to ev{sel,list}.c.

Cc: Borislav Petkov <bp@amd64.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-qn893qsstcg366tkucu649qj@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 80dc5b790e4790c22b7c4f23fcbae6f45b757acb..f6426b496f4aa0ee59c25a84622fc12c2dec32ff 100644 (file)
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -30,8 +30,6 @@
 #include <sched.h>
 #include <sys/mman.h>
 
-#define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y))
-
 enum write_mode_t {
        WRITE_FORCE,
        WRITE_APPEND
@@ -438,7 +436,6 @@ static void mmap_read_all(void)
 
 static int __cmd_record(int argc, const char **argv)
 {
-       int i;
        struct stat st;
        int flags;
        int err;
@@ -682,7 +679,6 @@ static int __cmd_record(int argc, const char **argv)
 
        for (;;) {
                int hits = samples;
-               int thread;
 
                mmap_read_all();
 
@@ -693,19 +689,8 @@ static int __cmd_record(int argc, const char **argv)
                        waking++;
                }
 
-               if (done) {
-                       for (i = 0; i < evsel_list->cpus->nr; i++) {
-                               struct perf_evsel *pos;
-
-                               list_for_each_entry(pos, &evsel_list->entries, node) {
-                                       for (thread = 0;
-                                               thread < evsel_list->threads->nr;
-                                               thread++)
-                                               ioctl(FD(pos, i, thread),
-                                                       PERF_EVENT_IOC_DISABLE);
-                               }
-                       }
-               }
+               if (done)
+                       perf_evlist__disable(evsel_list);
        }
 
        if (quiet || signr == SIGUSR1)

diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index b021ea9265c3e39b9f18fb9e65f731516b49642d..e03e7bc8205e10650ac30abaedfcc5239062e2f3 100644 (file)
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -91,6 +91,19 @@ int perf_evlist__add_default(struct perf_evlist *evlist)
        return 0;
 }
 
+void perf_evlist__disable(struct perf_evlist *evlist)
+{
+       int cpu, thread;
+       struct perf_evsel *pos;
+
+       for (cpu = 0; cpu < evlist->cpus->nr; cpu++) {
+               list_for_each_entry(pos, &evlist->entries, node) {
+                       for (thread = 0; thread < evlist->threads->nr; thread++)
+                               ioctl(FD(pos, cpu, thread), PERF_EVENT_IOC_DISABLE);
+               }
+       }
+}
+
 int perf_evlist__alloc_pollfd(struct perf_evlist *evlist)
 {
        int nfds = evlist->cpus->nr * evlist->threads->nr * evlist->nr_entries;

diff --git a/tools/perf/util/evlist.h b/tools/perf/util/evlist.h
index b2b862374f371d363bc19ed3cc684fde1de9f6d3..ce85ae9ae57a1feb6e7482049afa5dce491c596b 100644 (file)
--- a/tools/perf/util/evlist.h
+++ b/tools/perf/util/evlist.h
@@ -53,6 +53,8 @@ int perf_evlist__alloc_mmap(struct perf_evlist *evlist);
 int perf_evlist__mmap(struct perf_evlist *evlist, int pages, bool overwrite);
 void perf_evlist__munmap(struct perf_evlist *evlist);
 
+void perf_evlist__disable(struct perf_evlist *evlist);
+
 static inline void perf_evlist__set_maps(struct perf_evlist *evlist,
                                         struct cpu_map *cpus,
                                         struct thread_map *threads)