Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758821Ab0DHOjM (ORCPT ); Thu, 8 Apr 2010 10:39:12 -0400 Received: from bombadil.infradead.org ([18.85.46.34]:36251 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758781Ab0DHOjB (ORCPT ); Thu, 8 Apr 2010 10:39:01 -0400 From: Arnaldo Carvalho de Melo To: Ingo Molnar Cc: linux-kernel@vger.kernel.org, Arnaldo Carvalho de Melo , =?utf-8?q?Fr=C3=A9d=C3=A9ric=20Weisbecker?= , Hitoshi Mitake , Mike Galbraith , Peter Zijlstra , Paul Mackerras Subject: [PATCH 6/6] perf trace: Ignore "overwrite" field if present in /events/header_page Date: Thu, 8 Apr 2010 11:38:49 -0300 Message-Id: <1270737529-24258-7-git-send-email-acme@infradead.org> X-Mailer: git-send-email 1.6.2.5 In-Reply-To: <1270737529-24258-1-git-send-email-acme@infradead.org> References: <1270737529-24258-1-git-send-email-acme@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5008 Lines: 160 From: Arnaldo Carvalho de Melo That is not used in perf where we have the LOST events. Without this patch we get: [root@doppio ~]# perf lock report | head -3 Warning: Error: expected 'data' but read 'overwrite' So, to make the same perf command work with kernels with and without this field, introduce variants for the parsing routines to not warn the user in such case. Discussed-with: Steven Rostedt Cc: Frédéric Weisbecker Cc: Hitoshi Mitake Cc: Mike Galbraith Cc: Peter Zijlstra Cc: Paul Mackerras LKML-Reference: Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/trace-event-parse.c | 49 ++++++++++++++++++++++++---------- 1 files changed, 34 insertions(+), 15 deletions(-) diff --git a/tools/perf/util/trace-event-parse.c b/tools/perf/util/trace-event-parse.c index 9b3c20f..3b81250 100644 --- a/tools/perf/util/trace-event-parse.c +++ b/tools/perf/util/trace-event-parse.c @@ -37,6 +37,8 @@ int header_page_ts_offset; int header_page_ts_size; int header_page_size_offset; int header_page_size_size; +int header_page_overwrite_offset; +int header_page_overwrite_size; int header_page_data_offset; int header_page_data_size; @@ -628,23 +630,32 @@ static int test_type(enum event_type type, enum event_type expect) return 0; } -static int test_type_token(enum event_type type, char *token, - enum event_type expect, const char *expect_tok) +static int __test_type_token(enum event_type type, char *token, + enum event_type expect, const char *expect_tok, + bool warn) { if (type != expect) { - warning("Error: expected type %d but read %d", - expect, type); + if (warn) + warning("Error: expected type %d but read %d", + expect, type); return -1; } if (strcmp(token, expect_tok) != 0) { - warning("Error: expected '%s' but read '%s'", - expect_tok, token); + if (warn) + warning("Error: expected '%s' but read '%s'", + expect_tok, token); return -1; } return 0; } +static int test_type_token(enum event_type type, char *token, + enum event_type expect, const char *expect_tok) +{ + return __test_type_token(type, token, expect, expect_tok, true); +} + static int __read_expect_type(enum event_type expect, char **tok, int newline_ok) { enum event_type type; @@ -661,7 +672,8 @@ static int read_expect_type(enum event_type expect, char **tok) return __read_expect_type(expect, tok, 1); } -static int __read_expected(enum event_type expect, const char *str, int newline_ok) +static int __read_expected(enum event_type expect, const char *str, + int newline_ok, bool warn) { enum event_type type; char *token; @@ -672,21 +684,26 @@ static int __read_expected(enum event_type expect, const char *str, int newline_ else type = read_token_item(&token); - ret = test_type_token(type, token, expect, str); + ret = __test_type_token(type, token, expect, str, warn); free_token(token); return ret; } +static int read_expected_warn(enum event_type expect, const char *str, bool warn) +{ + return __read_expected(expect, str, 1, warn); +} + static int read_expected(enum event_type expect, const char *str) { - return __read_expected(expect, str, 1); + return __read_expected(expect, str, 1, true); } static int read_expected_item(enum event_type expect, const char *str) { - return __read_expected(expect, str, 0); + return __read_expected(expect, str, 0, true); } static char *event_read_name(void) @@ -3088,7 +3105,7 @@ static void print_args(struct print_arg *args) } static void parse_header_field(const char *field, - int *offset, int *size) + int *offset, int *size, bool warn) { char *token; int type; @@ -3103,7 +3120,7 @@ static void parse_header_field(const char *field, goto fail; free_token(token); - if (read_expected(EVENT_ITEM, field) < 0) + if (read_expected_warn(EVENT_ITEM, field, warn) < 0) return; if (read_expected(EVENT_OP, ";") < 0) return; @@ -3160,11 +3177,13 @@ int parse_header_page(char *buf, unsigned long size) init_input_buf(buf, size); parse_header_field("timestamp", &header_page_ts_offset, - &header_page_ts_size); + &header_page_ts_size, true); parse_header_field("commit", &header_page_size_offset, - &header_page_size_size); + &header_page_size_size, true); + parse_header_field("overwrite", &header_page_overwrite_offset, + &header_page_overwrite_size, false); parse_header_field("data", &header_page_data_offset, - &header_page_data_size); + &header_page_data_size, true); return 0; } -- 1.6.2.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/