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Date: Tue, 6 Apr 2021 11:53:34 +0300
From: "Bayduraev, Alexey V" <alexey.v.bayduraev@...ux.intel.com>
To: Arnaldo Carvalho de Melo <acme@...nel.org>
Cc: Jiri Olsa <jolsa@...hat.com>, Namhyung Kim <namhyung@...nel.org>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
Peter Zijlstra <peterz@...radead.org>,
Ingo Molnar <mingo@...hat.com>,
linux-kernel <linux-kernel@...r.kernel.org>,
Andi Kleen <ak@...ux.intel.com>,
Adrian Hunter <adrian.hunter@...el.com>,
Alexei Budankov <abudankov@...wei.com>,
Alexander Antonov <alexander.antonov@...ux.intel.com>
Subject: [PATCH v4 12/12] perf session: use reader functions to load perf data
file
Use the reader functions to load data file similar to loading of
data directory files.
Signed-off-by: Alexey Bayduraev <alexey.v.bayduraev@...ux.intel.com>
---
tools/perf/util/session.c | 215 ++++++++++++--------------------------
1 file changed, 66 insertions(+), 149 deletions(-)
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index 26fffadfd6ef..e60b0212f64e 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -2187,109 +2187,6 @@ static int __perf_session__process_decomp_events(struct perf_session *session)
return 0;
}
-static int
-reader__process_events(struct reader *rd, struct perf_session *session,
- struct ui_progress *prog)
-{
- u64 data_size = rd->data_size;
- u64 head, page_offset, file_offset, file_pos, size;
- int err = 0, mmap_prot, mmap_flags, map_idx = 0;
- size_t mmap_size;
- char *buf, *mmaps[NUM_MMAPS];
- union perf_event *event;
- s64 skip;
-
- page_offset = page_size * (rd->data_offset / page_size);
- file_offset = page_offset;
- head = rd->data_offset - page_offset;
-
- ui_progress__init_size(prog, data_size, "Processing events...");
-
- data_size += rd->data_offset;
-
- mmap_size = MMAP_SIZE;
- if (mmap_size > data_size) {
- mmap_size = data_size;
- session->one_mmap = true;
- }
-
- memset(mmaps, 0, sizeof(mmaps));
-
- mmap_prot = PROT_READ;
- mmap_flags = MAP_SHARED;
-
- if (session->header.needs_swap) {
- mmap_prot |= PROT_WRITE;
- mmap_flags = MAP_PRIVATE;
- }
-remap:
- buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, rd->fd,
- file_offset);
- if (buf == MAP_FAILED) {
- pr_err("failed to mmap file\n");
- err = -errno;
- goto out;
- }
- mmaps[map_idx] = buf;
- map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1);
- file_pos = file_offset + head;
- if (session->one_mmap) {
- session->one_mmap_addr = buf;
- session->one_mmap_offset = file_offset;
- }
-
-more:
- event = fetch_mmaped_event(head, mmap_size, buf, session->header.needs_swap);
- if (IS_ERR(event))
- return PTR_ERR(event);
-
- if (!event) {
- if (mmaps[map_idx]) {
- munmap(mmaps[map_idx], mmap_size);
- mmaps[map_idx] = NULL;
- }
-
- page_offset = page_size * (head / page_size);
- file_offset += page_offset;
- head -= page_offset;
- goto remap;
- }
-
- size = event->header.size;
-
- skip = -EINVAL;
-
- if (size < sizeof(struct perf_event_header) ||
- (skip = rd->process(session, event, file_pos, rd->path)) < 0) {
- pr_err("%#" PRIx64 " [%s] [%#x]: failed to process type: %d [%s]\n",
- file_offset + head, rd->path, event->header.size,
- event->header.type, strerror(-skip));
- err = skip;
- goto out;
- }
-
- if (skip)
- size += skip;
-
- head += size;
- file_pos += size;
-
- err = __perf_session__process_decomp_events(session);
- if (err)
- goto out;
-
- ui_progress__update(prog, size);
-
- if (session_done())
- goto out;
-
- if (file_pos < data_size)
- goto more;
-
-out:
- return err;
-}
-
static s64 process_simple(struct perf_session *session,
union perf_event *event,
u64 file_offset,
@@ -2298,52 +2195,6 @@ static s64 process_simple(struct perf_session *session,
return perf_session__process_event(session, event, file_offset, file_path);
}
-static int __perf_session__process_events(struct perf_session *session)
-{
- struct reader rd = {
- .fd = perf_data__fd(session->data),
- .data_size = session->header.data_size,
- .data_offset = session->header.data_offset,
- .process = process_simple,
- .path = session->data->file.path,
- };
- struct ordered_events *oe = &session->ordered_events;
- struct perf_tool *tool = session->tool;
- struct ui_progress prog;
- int err;
-
- perf_tool__fill_defaults(tool);
-
- if (rd.data_size == 0)
- return -1;
-
- ui_progress__init_size(&prog, rd.data_size, "Processing events...");
-
- err = reader__process_events(&rd, session, &prog);
- if (err)
- goto out_err;
- /* do the final flush for ordered samples */
- err = ordered_events__flush(oe, OE_FLUSH__FINAL);
- if (err)
- goto out_err;
- err = auxtrace__flush_events(session, tool);
- if (err)
- goto out_err;
- err = perf_session__flush_thread_stacks(session);
-out_err:
- ui_progress__finish();
- if (!tool->no_warn)
- perf_session__warn_about_errors(session);
- /*
- * We may switching perf.data output, make ordered_events
- * reusable.
- */
- ordered_events__reinit(&session->ordered_events);
- auxtrace__free_events(session);
- session->one_mmap = false;
- return err;
-}
-
static int
reader__init(struct reader *rd, bool *one_mmap)
{
@@ -2460,6 +2311,72 @@ reader__read_event(struct reader *rd, struct perf_session *session,
session->active_reader = NULL;;
return ret;
}
+
+static int __perf_session__process_events(struct perf_session *session)
+{
+ struct reader *rd;
+ struct ordered_events *oe = &session->ordered_events;
+ struct perf_tool *tool = session->tool;
+ struct ui_progress prog;
+ int err;
+
+ perf_tool__fill_defaults(tool);
+
+ rd = session->readers = zalloc(sizeof(struct reader));
+ if (!rd)
+ return -ENOMEM;
+
+ session->nr_readers = 1;
+
+ *rd = (struct reader) {
+ .fd = perf_data__fd(session->data),
+ .data_size = session->header.data_size,
+ .data_offset = session->header.data_offset,
+ .process = process_simple,
+ .path = session->data->file.path,
+ };
+
+ ui_progress__init_size(&prog, rd->data_size, "Processing events...");
+
+ reader__init(rd, &session->one_mmap);
+ if (reader__mmap(rd, session) != READER_OK)
+ goto out_err;
+
+ while (true) {
+ if (session_done())
+ break;
+
+ err = reader__read_event(rd, session, &prog);
+ if (err < 0)
+ break;
+ if (err == READER_EOF) {
+ err = reader__mmap(rd, session);
+ if (err <= 0)
+ break;
+ }
+ }
+
+ /* do the final flush for ordered samples */
+ err = ordered_events__flush(oe, OE_FLUSH__FINAL);
+ if (err)
+ goto out_err;
+ err = auxtrace__flush_events(session, tool);
+ if (err)
+ goto out_err;
+ err = perf_session__flush_thread_stacks(session);
+out_err:
+ ui_progress__finish();
+ if (!tool->no_warn)
+ perf_session__warn_about_errors(session);
+ /*
+ * We may switching perf.data output, make ordered_events
+ * reusable.
+ */
+ ordered_events__reinit(&session->ordered_events);
+ auxtrace__free_events(session);
+ session->one_mmap = false;
+ return err;
+}
/*
* This function reads, merge and process directory data.
* It assumens the version 1 of directory data, where each
--
2.19.0
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