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From: Jiri Olsa <jolsa@kernel.org>
To: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: lkml <linux-kernel@vger.kernel.org>,
	Ingo Molnar <mingo@kernel.org>,
	Namhyung Kim <namhyung@kernel.org>,
	Alexander Shishkin <alexander.shishkin@linux.intel.com>,
	Peter Zijlstra <a.p.zijlstra@chello.nl>,
	Michael Petlan <mpetlan@redhat.com>
Subject: [PATCH 50/73] libperf: Add perf_mmap__read_done function
Date: Fri, 13 Sep 2019 15:23:32 +0200	[thread overview]
Message-ID: <20190913132355.21634-51-jolsa@kernel.org> (raw)
In-Reply-To: <20190913132355.21634-1-jolsa@kernel.org>

Move perf_mmap__read_init function under libperf
and export it in perf/mmap.h header.

Link: http://lkml.kernel.org/n/tip-qc6p8q4t9dk7x1ik2a8yuf8z@git.kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
 tools/perf/arch/x86/tests/perf-time-to-tsc.c |  2 +-
 tools/perf/builtin-kvm.c                     |  2 +-
 tools/perf/builtin-top.c                     |  2 +-
 tools/perf/builtin-trace.c                   |  2 +-
 tools/perf/lib/include/perf/mmap.h           |  1 +
 tools/perf/lib/libperf.map                   |  1 +
 tools/perf/lib/mmap.c                        | 17 +++++++++++++++++
 tools/perf/tests/backward-ring-buffer.c      |  2 +-
 tools/perf/tests/bpf.c                       |  2 +-
 tools/perf/tests/code-reading.c              |  2 +-
 tools/perf/tests/keep-tracking.c             |  2 +-
 tools/perf/tests/mmap-basic.c                |  2 +-
 tools/perf/tests/openat-syscall-tp-fields.c  |  2 +-
 tools/perf/tests/perf-record.c               |  2 +-
 tools/perf/tests/sw-clock.c                  |  2 +-
 tools/perf/tests/switch-tracking.c           |  2 +-
 tools/perf/tests/task-exit.c                 |  2 +-
 tools/perf/util/evlist.c                     |  2 +-
 tools/perf/util/mmap.c                       | 17 -----------------
 tools/perf/util/mmap.h                       |  1 -
 20 files changed, 34 insertions(+), 33 deletions(-)

diff --git a/tools/perf/arch/x86/tests/perf-time-to-tsc.c b/tools/perf/arch/x86/tests/perf-time-to-tsc.c
index ca5e483c3fda..04da28d15039 100644
--- a/tools/perf/arch/x86/tests/perf-time-to-tsc.c
+++ b/tools/perf/arch/x86/tests/perf-time-to-tsc.c
@@ -142,7 +142,7 @@ int test__perf_time_to_tsc(struct test *test __maybe_unused, int subtest __maybe
 next_event:
 			perf_mmap__consume(&md->core);
 		}
-		perf_mmap__read_done(md);
+		perf_mmap__read_done(&md->core);
 	}
 
 	if (!comm1_time || !comm2_time)
diff --git a/tools/perf/builtin-kvm.c b/tools/perf/builtin-kvm.c
index ca7e48379f57..4b281d77d22c 100644
--- a/tools/perf/builtin-kvm.c
+++ b/tools/perf/builtin-kvm.c
@@ -790,7 +790,7 @@ static s64 perf_kvm__mmap_read_idx(struct perf_kvm_stat *kvm, int idx,
 			break;
 	}
 
-	perf_mmap__read_done(md);
+	perf_mmap__read_done(&md->core);
 	return n;
 }
 
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 86b7a71dc5ed..c122aa1e9ca1 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -890,7 +890,7 @@ static void perf_top__mmap_read_idx(struct perf_top *top, int idx)
 		}
 	}
 
-	perf_mmap__read_done(md);
+	perf_mmap__read_done(&md->core);
 }
 
 static void perf_top__mmap_read(struct perf_top *top)
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index fcdb30e93a81..1ae249d9ecf0 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -3467,7 +3467,7 @@ static int trace__run(struct trace *trace, int argc, const char **argv)
 				draining = true;
 			}
 		}
-		perf_mmap__read_done(md);
+		perf_mmap__read_done(&md->core);
 	}
 
 	if (trace->nr_events == before) {
diff --git a/tools/perf/lib/include/perf/mmap.h b/tools/perf/lib/include/perf/mmap.h
index 646e9052b003..4f946e7f724b 100644
--- a/tools/perf/lib/include/perf/mmap.h
+++ b/tools/perf/lib/include/perf/mmap.h
@@ -8,5 +8,6 @@ struct perf_mmap;
 
 LIBPERF_API void perf_mmap__consume(struct perf_mmap *map);
 LIBPERF_API int perf_mmap__read_init(struct perf_mmap *map);
+LIBPERF_API void perf_mmap__read_done(struct perf_mmap *map);
 
 #endif /* __LIBPERF_MMAP_H */
diff --git a/tools/perf/lib/libperf.map b/tools/perf/lib/libperf.map
index fba8cdfb3987..eca40c75b753 100644
--- a/tools/perf/lib/libperf.map
+++ b/tools/perf/lib/libperf.map
@@ -41,6 +41,7 @@ LIBPERF_0.0.1 {
 		perf_evlist__poll;
 		perf_mmap__consume;
 		perf_mmap__read_init;
+		perf_mmap__read_done;
 	local:
 		*;
 };
diff --git a/tools/perf/lib/mmap.c b/tools/perf/lib/mmap.c
index 15f91b976ce7..f27cb743183c 100644
--- a/tools/perf/lib/mmap.c
+++ b/tools/perf/lib/mmap.c
@@ -185,3 +185,20 @@ int perf_mmap__read_init(struct perf_mmap *map)
 
 	return __perf_mmap__read_init(map);
 }
+
+/*
+ * Mandatory for overwrite mode
+ * The direction of overwrite mode is backward.
+ * The last perf_mmap__read() will set tail to map->core.prev.
+ * Need to correct the map->core.prev to head which is the end of next read.
+ */
+void perf_mmap__read_done(struct perf_mmap *map)
+{
+	/*
+	 * Check if event was unmapped due to a POLLHUP/POLLERR.
+	 */
+	if (!refcount_read(&map->refcnt))
+		return;
+
+	map->prev = perf_mmap__read_head(map);
+}
diff --git a/tools/perf/tests/backward-ring-buffer.c b/tools/perf/tests/backward-ring-buffer.c
index 085e4d632be4..4b5625ac257c 100644
--- a/tools/perf/tests/backward-ring-buffer.c
+++ b/tools/perf/tests/backward-ring-buffer.c
@@ -53,7 +53,7 @@ static int count_samples(struct evlist *evlist, int *sample_count,
 				return TEST_FAIL;
 			}
 		}
-		perf_mmap__read_done(map);
+		perf_mmap__read_done(&map->core);
 	}
 	return TEST_OK;
 }
diff --git a/tools/perf/tests/bpf.c b/tools/perf/tests/bpf.c
index d7e328d2d1f2..a0b559c90f9b 100644
--- a/tools/perf/tests/bpf.c
+++ b/tools/perf/tests/bpf.c
@@ -193,7 +193,7 @@ static int do_test(struct bpf_object *obj, int (*func)(void),
 			if (type == PERF_RECORD_SAMPLE)
 				count ++;
 		}
-		perf_mmap__read_done(md);
+		perf_mmap__read_done(&md->core);
 	}
 
 	if (count != expect) {
diff --git a/tools/perf/tests/code-reading.c b/tools/perf/tests/code-reading.c
index 3c5de881b43c..3306d75cb596 100644
--- a/tools/perf/tests/code-reading.c
+++ b/tools/perf/tests/code-reading.c
@@ -434,7 +434,7 @@ static int process_events(struct machine *machine, struct evlist *evlist,
 			if (ret < 0)
 				return ret;
 		}
-		perf_mmap__read_done(md);
+		perf_mmap__read_done(&md->core);
 	}
 	return 0;
 }
diff --git a/tools/perf/tests/keep-tracking.c b/tools/perf/tests/keep-tracking.c
index 3cdee969958d..10ea5112b996 100644
--- a/tools/perf/tests/keep-tracking.c
+++ b/tools/perf/tests/keep-tracking.c
@@ -49,7 +49,7 @@ static int find_comm(struct evlist *evlist, const char *comm)
 				found += 1;
 			perf_mmap__consume(&md->core);
 		}
-		perf_mmap__read_done(md);
+		perf_mmap__read_done(&md->core);
 	}
 	return found;
 }
diff --git a/tools/perf/tests/mmap-basic.c b/tools/perf/tests/mmap-basic.c
index e9c1fbe5a9aa..65b84032ee13 100644
--- a/tools/perf/tests/mmap-basic.c
+++ b/tools/perf/tests/mmap-basic.c
@@ -142,7 +142,7 @@ int test__basic_mmap(struct test *test __maybe_unused, int subtest __maybe_unuse
 		nr_events[evsel->idx]++;
 		perf_mmap__consume(&md->core);
 	}
-	perf_mmap__read_done(md);
+	perf_mmap__read_done(&md->core);
 
 out_init:
 	err = 0;
diff --git a/tools/perf/tests/openat-syscall-tp-fields.c b/tools/perf/tests/openat-syscall-tp-fields.c
index 6c04753fe5f0..771d1671f1fe 100644
--- a/tools/perf/tests/openat-syscall-tp-fields.c
+++ b/tools/perf/tests/openat-syscall-tp-fields.c
@@ -123,7 +123,7 @@ int test__syscall_openat_tp_fields(struct test *test __maybe_unused, int subtest
 
 				goto out_ok;
 			}
-			perf_mmap__read_done(md);
+			perf_mmap__read_done(&md->core);
 		}
 
 		if (nr_events == before)
diff --git a/tools/perf/tests/perf-record.c b/tools/perf/tests/perf-record.c
index 086cabb56db2..a0a2d9a49157 100644
--- a/tools/perf/tests/perf-record.c
+++ b/tools/perf/tests/perf-record.c
@@ -278,7 +278,7 @@ int test__PERF_RECORD(struct test *test __maybe_unused, int subtest __maybe_unus
 
 				perf_mmap__consume(&md->core);
 			}
-			perf_mmap__read_done(md);
+			perf_mmap__read_done(&md->core);
 		}
 
 		/*
diff --git a/tools/perf/tests/sw-clock.c b/tools/perf/tests/sw-clock.c
index 4b13d746f264..d2612960669f 100644
--- a/tools/perf/tests/sw-clock.c
+++ b/tools/perf/tests/sw-clock.c
@@ -119,7 +119,7 @@ static int __test__sw_clock_freq(enum perf_sw_ids clock_id)
 next_event:
 		perf_mmap__consume(&md->core);
 	}
-	perf_mmap__read_done(md);
+	perf_mmap__read_done(&md->core);
 
 out_init:
 	if ((u64) nr_samples == total_periods) {
diff --git a/tools/perf/tests/switch-tracking.c b/tools/perf/tests/switch-tracking.c
index f774b50f926e..e2beb68281e2 100644
--- a/tools/perf/tests/switch-tracking.c
+++ b/tools/perf/tests/switch-tracking.c
@@ -280,7 +280,7 @@ static int process_events(struct evlist *evlist,
 			if (ret < 0)
 				goto out_free_nodes;
 		}
-		perf_mmap__read_done(md);
+		perf_mmap__read_done(&md->core);
 	}
 
 	events_array = calloc(cnt, sizeof(struct event_node));
diff --git a/tools/perf/tests/task-exit.c b/tools/perf/tests/task-exit.c
index 6a1ca5d6dfdf..988739fcaf8d 100644
--- a/tools/perf/tests/task-exit.c
+++ b/tools/perf/tests/task-exit.c
@@ -126,7 +126,7 @@ int test__task_exit(struct test *test __maybe_unused, int subtest __maybe_unused
 
 		perf_mmap__consume(&md->core);
 	}
-	perf_mmap__read_done(md);
+	perf_mmap__read_done(&md->core);
 
 out_init:
 	if (!exited || !nr_exit) {
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 38fd27f5bf0f..4f92b65e702c 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -1765,7 +1765,7 @@ static void *perf_evlist__poll_thread(void *arg)
 				perf_mmap__consume(&map->core);
 				got_data = true;
 			}
-			perf_mmap__read_done(map);
+			perf_mmap__read_done(&map->core);
 		}
 
 		if (draining && !got_data)
diff --git a/tools/perf/util/mmap.c b/tools/perf/util/mmap.c
index 5913f7354232..5ede1d2c84b1 100644
--- a/tools/perf/util/mmap.c
+++ b/tools/perf/util/mmap.c
@@ -404,20 +404,3 @@ int perf_mmap__push(struct mmap *md, void *to,
 out:
 	return rc;
 }
-
-/*
- * Mandatory for overwrite mode
- * The direction of overwrite mode is backward.
- * The last perf_mmap__read() will set tail to map->core.prev.
- * Need to correct the map->core.prev to head which is the end of next read.
- */
-void perf_mmap__read_done(struct mmap *map)
-{
-	/*
-	 * Check if event was unmapped due to a POLLHUP/POLLERR.
-	 */
-	if (!refcount_read(&map->core.refcnt))
-		return;
-
-	map->core.prev = perf_mmap__read_head(&map->core);
-}
diff --git a/tools/perf/util/mmap.h b/tools/perf/util/mmap.h
index 3849bcbbe9ce..efc2392747ba 100644
--- a/tools/perf/util/mmap.h
+++ b/tools/perf/util/mmap.h
@@ -82,5 +82,4 @@ int perf_mmap__push(struct mmap *md, void *to,
 
 size_t mmap__mmap_len(struct mmap *map);
 
-void perf_mmap__read_done(struct mmap *map);
 #endif /*__PERF_MMAP_H */
-- 
2.21.0


  parent reply	other threads:[~2019-09-13 13:26 UTC|newest]

Thread overview: 80+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-09-13 13:22 [RFC 00/73] libperf: Add sampling interface Jiri Olsa
2019-09-13 13:22 ` [PATCH 01/73] tools: Add missing stdio.h include to asm/bug.h header Jiri Olsa
2019-09-13 13:22 ` [PATCH 02/73] perf tests: Fix static build test Jiri Olsa
2019-09-13 13:22 ` [PATCH 03/73] perf tools: Rename struct perf_mmap to struct mmap Jiri Olsa
2019-09-13 13:22 ` [PATCH 04/73] perf tools: Rename perf_evlist__mmap() to evlist__mmap() Jiri Olsa
2019-09-13 13:22 ` [PATCH 05/73] perf tools: Rename perf_evlist__munmap() to evlist__munmap() Jiri Olsa
2019-09-13 13:22 ` [PATCH 06/73] perf tools: Rename perf_evlist__alloc_mmap() to evlist__alloc_mmap() Jiri Olsa
2019-09-13 13:22 ` [PATCH 07/73] perf tools: Rename perf_evlist__exit() to evlist__exit() Jiri Olsa
2019-09-13 13:22 ` [PATCH 08/73] perf tools: Rename perf_evlist__purge() to evlist__purge() Jiri Olsa
2019-09-13 13:22 ` [PATCH 09/73] libperf: Link libapi.a in libperf.so Jiri Olsa
2019-09-13 13:22 ` [PATCH 10/73] libperf: Add perf_mmap struct Jiri Olsa
2019-09-23 15:05   ` Arnaldo Carvalho de Melo
2019-09-23 15:09     ` Jiri Olsa
2019-09-13 13:22 ` [PATCH 11/73] libperf: Add mask to struct perf_mmap Jiri Olsa
2019-09-13 13:22 ` [PATCH 12/73] libperf: Add fd " Jiri Olsa
2019-09-13 13:22 ` [PATCH 13/73] libperf: Add cpu " Jiri Olsa
2019-09-13 13:22 ` [PATCH 14/73] libperf: Add refcnt " Jiri Olsa
2019-09-13 13:22 ` [PATCH 15/73] libperf: Add prev/start/end " Jiri Olsa
2019-09-13 13:22 ` [PATCH 16/73] libperf: Add overwrite " Jiri Olsa
2019-09-13 13:22 ` [PATCH 17/73] libperf: Add event_copy " Jiri Olsa
2019-09-13 13:23 ` [PATCH 18/73] libperf: Add flush " Jiri Olsa
2019-09-13 13:23 ` [PATCH 19/73] libperf: Move system_wide from struct evsel to struct perf_evsel Jiri Olsa
2019-09-23 18:08   ` Arnaldo Carvalho de Melo
2019-09-13 13:23 ` [PATCH 20/73] libperf: Move nr_mmaps from struct evlist to struct perf_evlist Jiri Olsa
2019-09-13 13:23 ` [PATCH 21/73] libperf: Move mmap_len " Jiri Olsa
2019-09-13 13:23 ` [PATCH 22/73] libperf: Move pollfd " Jiri Olsa
2019-09-13 13:23 ` [PATCH 23/73] libperf: Move sample_id from struct evsel to struct perf_evsel Jiri Olsa
2019-09-13 13:23 ` [PATCH 24/73] libperf: Move id " Jiri Olsa
2019-09-13 13:23 ` [PATCH 25/73] libperf: Move ids " Jiri Olsa
2019-09-13 13:23 ` [PATCH 26/73] libperf: Move heads from struct evlist to struct perf_evlist Jiri Olsa
2019-09-13 13:23 ` [PATCH 27/73] libperf: Add perf_evsel__alloc_id/perf_evsel__free_id functions Jiri Olsa
2019-09-13 13:23 ` [PATCH 28/73] libperf: Add perf_evlist__first/last functions Jiri Olsa
2019-09-13 13:23 ` [PATCH 29/73] libperf: Add perf_evlist__read_format function Jiri Olsa
2019-09-13 13:23 ` [PATCH 30/73] libperf: Add perf_evlist__id_add function Jiri Olsa
2019-09-13 13:23 ` [PATCH 31/73] libperf: Add perf_evlist__id_add_fd function Jiri Olsa
2019-09-13 13:23 ` [PATCH 32/73] libperf: Move page_size into libperf Jiri Olsa
2019-09-23 19:10   ` Arnaldo Carvalho de Melo
2019-09-23 19:17     ` Jiri Olsa
2019-09-13 13:23 ` [PATCH 33/73] libperf: Merge libperf_set_print in libperf_init Jiri Olsa
2019-09-13 13:23 ` [PATCH 34/73] libperf: Add libperf_init call to tests Jiri Olsa
2019-09-13 13:23 ` [PATCH 35/73] libperf: Add libperf dependency for tests targets Jiri Olsa
2019-09-13 13:23 ` [PATCH 36/73] libperf: Add perf_evlist__alloc_pollfd function Jiri Olsa
2019-09-13 13:23 ` [PATCH 37/73] libperf: Add perf_evlist__add_pollfd function Jiri Olsa
2019-09-13 13:23 ` [PATCH 38/73] libperf: Add perf_evlist__poll function Jiri Olsa
2019-09-13 13:23 ` [PATCH 39/73] libperf: Add perf_mmap__init function Jiri Olsa
2019-09-13 13:23 ` [PATCH 40/73] libperf: Add struct perf_mmap_param Jiri Olsa
2019-09-13 13:23 ` [PATCH 41/73] libperf: Add perf_mmap__mmap_len function Jiri Olsa
2019-09-13 13:23 ` [PATCH 42/73] libperf: Add perf_mmap__mmap function Jiri Olsa
2019-09-13 13:23 ` [PATCH 43/73] libperf: Add perf_mmap__get function Jiri Olsa
2019-09-13 13:23 ` [PATCH 44/73] libperf: Add perf_mmap__unmap function Jiri Olsa
2019-09-13 13:23 ` [PATCH 45/73] libperf: Add perf_mmap__put function Jiri Olsa
2019-09-13 13:23 ` [PATCH 46/73] libperf: Add perf_mmap__new function Jiri Olsa
2019-09-13 13:23 ` [PATCH 47/73] perf tools: Use perf_mmap way to detect aux mmap Jiri Olsa
2019-09-13 13:23 ` [PATCH 48/73] libperf: Add perf_mmap__consume function Jiri Olsa
2019-09-13 13:23 ` [PATCH 49/73] libperf: Add perf_mmap__read_init function Jiri Olsa
2019-09-13 13:23 ` Jiri Olsa [this message]
2019-09-13 13:23 ` [PATCH 51/73] libperf: Add perf_mmap__read_event function Jiri Olsa
2019-09-13 13:23 ` [PATCH 52/73] libperf: Add perf_evlist__mmap/munmap function Jiri Olsa
2019-09-13 13:23 ` [PATCH 53/73] libperf: Add perf_evlist__mmap_ops function Jiri Olsa
2019-09-13 13:23 ` [PATCH 54/73] libperf: Add perf_evlist_mmap_ops::idx callback Jiri Olsa
2019-09-13 13:23 ` [PATCH 55/73] libperf: Add perf_evlist_mmap_ops::new callback Jiri Olsa
2019-09-13 13:23 ` [PATCH 56/73] libperf: Add perf_evlist_mmap_ops::mmap callback Jiri Olsa
2019-09-13 13:23 ` [PATCH 57/73] perf tools: Add perf_evlist__mmap_cb_idx function Jiri Olsa
2019-09-13 13:23 ` [PATCH 58/73] perf tools: Add perf_evlist__mmap_cb_new function Jiri Olsa
2019-09-13 13:23 ` [PATCH 59/73] perf tools: Add perf_evlist__mmap_cb_mmap function Jiri Olsa
2019-09-13 13:23 ` [PATCH 60/73] perf tools: Switch to libperf mmap interface Jiri Olsa
2019-09-13 13:23 ` [PATCH 61/73] libperf: Move pollfd allocation to libperf Jiri Olsa
2019-09-13 13:23 ` [PATCH 62/73] libperf: Add perf_evlist__exit function Jiri Olsa
2019-09-13 13:23 ` [PATCH 63/73] libperf: Add perf_evlist__purge function Jiri Olsa
2019-09-13 13:23 ` [PATCH 64/73] libperf: Call perf_evlist__munmap/close on perf_evlist__delete Jiri Olsa
2019-09-13 13:23 ` [PATCH 65/73] libperf: Add perf_evlist__filter_pollfd function Jiri Olsa
2019-09-13 13:23 ` [PATCH 66/73] libperf: Add perf_evlist__for_each_mmap function Jiri Olsa
2019-09-13 13:23 ` [PATCH 67/73] libperf: Link static tests with libapi.a Jiri Olsa
2019-09-13 13:23 ` [PATCH 68/73] libperf: Add _GNU_SOURCE define to compilation Jiri Olsa
2019-09-13 13:23 ` [PATCH 69/73] libperf: Add tests_mmap_thread test Jiri Olsa
2019-09-13 13:23 ` [PATCH 70/73] libperf: Add tests_mmap_cpus test Jiri Olsa
2019-09-13 13:23 ` [PATCH 71/73] libperf: Keep count of failed tests Jiri Olsa
2019-09-13 13:23 ` [PATCH 72/73] libperf: Do not export perf_evsel__init/perf_evlist__init Jiri Olsa
2019-09-13 13:23 ` [PATCH 73/73] libperf: Add pr_err macro Jiri Olsa
2019-09-22 14:47 ` [RFC 00/73] libperf: Add sampling interface Jiri Olsa

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