Merge tag 'perf-core-for-mingo-2' of git://git.kernel.org/pub/scm/lin…

…ux/kernel/git/acme/linux into perf/core

Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo:

User visible changes:

  - Add 'socket' sort entry, to sort by the processor socket in
    'perf top' and 'perf report'. (Kan Liang)

  - Introduce --socket-filter to 'perf report', for filtering by processor
    socket. (Kan Liang)

  - Add new "Zoom into Processor Socket" operation in the perf hists browser,
    used in 'perf top' and 'perf report'. (Kan Liang)

  - Fix the 'CPU' hist browser column width calculation. (Arnaldo Carvalho de Melo)

Infrastructure changes:

  - 'perf test' fixes for the object code reading entry. (Jan Stancek)

  - Add processor socket and cpu topology 'perf test' entries. (Kan Liang)

  - Introduce more sysfs__read_TYPE() helpers. (Arnaldo Carvalho de Melo)

  - Group cpu information reading functions in tools/lib/api/cpu.[ch],
    starting with cpu__get_max_freq() from a patchkit by Kan Liang.
    (Arnaldo Carvalho de Melo)

  - Retrieve the MSR PMU type from a perf.data file header and store it
    in struct perf_env. (Kan Liang)

  - Add tools/include into CTAGS file list. (Jiri Olsa)

  - Add iterator function for perf tests. (Matt Fleming)

  - Switch to tracing_patch interface. (Jiri Olsa)

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>

tools/lib/api/Build

@@ -1,2 +1,3 @@
 libapi-y += fd/
 libapi-y += fs/
+libapi-y += cpu.o

tools/lib/api/cpu.c

@@ -0,0 +1,18 @@
+#include <stdio.h>
+
+#include "cpu.h"
+#include "fs/fs.h"
+
+int cpu__get_max_freq(unsigned long long *freq)
+{
+	char entry[PATH_MAX];
+	int cpu;
+
+	if (sysfs__read_int("devices/system/cpu/online", &cpu) < 0)
+		return -1;
+
+	snprintf(entry, sizeof(entry),
+		 "devices/system/cpu/cpu%d/cpufreq/cpuinfo_max_freq", cpu);
+
+	return sysfs__read_ull(entry, freq);
+}

tools/lib/api/cpu.h

@@ -0,0 +1,6 @@
+#ifndef __API_CPU__
+#define __API_CPU__
+
+int cpu__get_max_freq(unsigned long long *freq);
+
+#endif /* __API_CPU__ */

tools/lib/api/fs/Build

@@ -1,5 +1,2 @@
 libapi-y += fs.o
 libapi-y += tracing_path.o
-libapi-y += debugfs.o
-libapi-y += findfs.o
-libapi-y += tracefs.o

tools/lib/api/fs/fs.c

@@ -1,5 +1,6 @@
 #include <ctype.h>
 #include <errno.h>
+#include <limits.h>
 #include <stdbool.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -11,7 +12,6 @@
 #include <unistd.h>
 #include <sys/mount.h>
 
-#include "debugfs.h"
 #include "fs.h"
 
 #define _STR(x) #x
@@ -282,6 +282,50 @@ int filename__read_int(const char *filename, int *value)
 	return err;
 }
 
+int filename__read_ull(const char *filename, unsigned long long *value)
+{
+	char line[64];
+	int fd = open(filename, O_RDONLY), err = -1;
+
+	if (fd < 0)
+		return -1;
+
+	if (read(fd, line, sizeof(line)) > 0) {
+		*value = strtoull(line, NULL, 10);
+		if (*value != ULLONG_MAX)
+			err = 0;
+	}
+
+	close(fd);
+	return err;
+}
+
+int sysfs__read_ull(const char *entry, unsigned long long *value)
+{
+	char path[PATH_MAX];
+	const char *sysfs = sysfs__mountpoint();
+
+	if (!sysfs)
+		return -1;
+
+	snprintf(path, sizeof(path), "%s/%s", sysfs, entry);
+
+	return filename__read_ull(path, value);
+}
+
+int sysfs__read_int(const char *entry, int *value)
+{
+	char path[PATH_MAX];
+	const char *sysfs = sysfs__mountpoint();
+
+	if (!sysfs)
+		return -1;
+
+	snprintf(path, sizeof(path), "%s/%s", sysfs, entry);
+
+	return filename__read_int(path, value);
+}
+
 int sysctl__read_int(const char *sysctl, int *value)
 {
 	char path[PATH_MAX];

tools/lib/api/fs/fs.h

@@ -25,5 +25,9 @@ FS(tracefs)
 
 
 int filename__read_int(const char *filename, int *value);
+int filename__read_ull(const char *filename, unsigned long long *value);
+
 int sysctl__read_int(const char *sysctl, int *value);
+int sysfs__read_int(const char *entry, int *value);
+int sysfs__read_ull(const char *entry, unsigned long long *value);
 #endif /* __API_FS__ */