Merge tag 'perf-core-for-mingo-20161201' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core

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

New features:

 - Support AArch64 in the 'annotate' code, native/local and
   cross-arch/remote (Kim Phillips)

 - Allow considering just events in a given time interval, via the
   '--time start.s.ms,end.s.ms' command line, added to 'perf kmem',
   'perf report', 'perf sched timehist' and 'perf script' (David Ahern)

 - Add option to stop printing a callchain at one of a given group of
   symbol names (David Ahern)

 - Handle CPU migration events in 'perf sched timehist' (David Ahern)

 - Track memory freed in 'perf kmem stat' (David Ahern)

Infrastructure:

 - Add initial support (and perf test entry) for tooling hooks, starting with
   'record_start' and 'record_end', that will have as its initial user the
   eBPF infrastructure, where perf_ prefixed functions will be JITed and
   run when such hooks are called (Wang Nan)

 - Remove redundant "test" and similar strings from 'perf test' descriptions
   (Arnaldo Carvalho de Melo)

 - Implement assorted libbpf improvements (Wang Nan)

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

1 files changed, 35 insertions, 1 deletions

diff --git a/tools/perf/builtin-kmem.c b/tools/perf/builtin-kmem.c
index d426dcb18ce9..35a02f8e5a4a 100644
--- a/tools/perf/builtin-kmem.c
+++ b/tools/perf/builtin-kmem.c
@@ -11,6 +11,7 @@
 #include "util/session.h"
 #include "util/tool.h"
 #include "util/callchain.h"
+#include "util/time-utils.h"
 
 #include <subcmd/parse-options.h>
 #include "util/trace-event.h"
@@ -49,6 +50,7 @@ struct alloc_stat {
 	u64	ptr;
 	u64	bytes_req;
 	u64	bytes_alloc;
+	u64	last_alloc;
 	u32	hit;
 	u32	pingpong;
 
@@ -62,9 +64,13 @@ static struct rb_root root_alloc_sorted;
 static struct rb_root root_caller_stat;
 static struct rb_root root_caller_sorted;
 
-static unsigned long total_requested, total_allocated;
+static unsigned long total_requested, total_allocated, total_freed;
 static unsigned long nr_allocs, nr_cross_allocs;
 
+/* filters for controlling start and stop of time of analysis */
+static struct perf_time_interval ptime;
+const char *time_str;
+
 static int insert_alloc_stat(unsigned long call_site, unsigned long ptr,
 			     int bytes_req, int bytes_alloc, int cpu)
 {
@@ -105,6 +111,8 @@ static int insert_alloc_stat(unsigned long call_site, unsigned long ptr,
 	}
 	data->call_site = call_site;
 	data->alloc_cpu = cpu;
+	data->last_alloc = bytes_alloc;
+
 	return 0;
 }
 
@@ -223,6 +231,8 @@ static int perf_evsel__process_free_event(struct perf_evsel *evsel,
 	if (!s_alloc)
 		return 0;
 
+	total_freed += s_alloc->last_alloc;
+
 	if ((short)sample->cpu != s_alloc->alloc_cpu) {
 		s_alloc->pingpong++;
 
@@ -907,6 +917,15 @@ static int perf_evsel__process_page_free_event(struct perf_evsel *evsel,
 	return 0;
 }
 
+static bool perf_kmem__skip_sample(struct perf_sample *sample)
+{
+	/* skip sample based on time? */
+	if (perf_time__skip_sample(&ptime, sample->time))
+		return true;
+
+	return false;
+}
+
 typedef int (*tracepoint_handler)(struct perf_evsel *evsel,
 				  struct perf_sample *sample);
 
@@ -926,6 +945,9 @@ static int process_sample_event(struct perf_tool *tool __maybe_unused,
 		return -1;
 	}
 
+	if (perf_kmem__skip_sample(sample))
+		return 0;
+
 	dump_printf(" ... thread: %s:%d\n", thread__comm_str(thread), thread->tid);
 
 	if (evsel->handler != NULL) {
@@ -1128,6 +1150,11 @@ static void print_slab_summary(void)
 	printf("\n========================\n");
 	printf("Total bytes requested: %'lu\n", total_requested);
 	printf("Total bytes allocated: %'lu\n", total_allocated);
+	printf("Total bytes freed:     %'lu\n", total_freed);
+	if (total_allocated > total_freed) {
+		printf("Net total bytes allocated: %'lu\n",
+		total_allocated - total_freed);
+	}
 	printf("Total bytes wasted on internal fragmentation: %'lu\n",
 	       total_allocated - total_requested);
 	printf("Internal fragmentation: %f%%\n",
@@ -1884,6 +1911,8 @@ int cmd_kmem(int argc, const char **argv, const char *prefix __maybe_unused)
 	OPT_CALLBACK_NOOPT(0, "page", NULL, NULL, "Analyze page allocator",
 			   parse_page_opt),
 	OPT_BOOLEAN(0, "live", &live_page, "Show live page stat"),
+	OPT_STRING(0, "time", &time_str, "str",
+		   "Time span of interest (start,stop)"),
 	OPT_END()
 	};
 	const char *const kmem_subcommands[] = { "record", "stat", NULL };
@@ -1944,6 +1973,11 @@ int cmd_kmem(int argc, const char **argv, const char *prefix __maybe_unused)
 
 	symbol__init(&session->header.env);
 
+	if (perf_time__parse_str(&ptime, time_str) != 0) {
+		pr_err("Invalid time string\n");
+		return -EINVAL;
+	}
+
 	if (!strcmp(argv[0], "stat")) {
 		setlocale(LC_ALL, "");