From patchwork Tue Aug 3 04:23:29 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Steven Rostedt X-Patchwork-Id: 491253 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2781AC4338F for ; Tue, 3 Aug 2021 04:24:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0019561159 for ; Tue, 3 Aug 2021 04:24:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233752AbhHCEYJ (ORCPT ); Tue, 3 Aug 2021 00:24:09 -0400 Received: from mail.kernel.org ([198.145.29.99]:57112 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231966AbhHCEYH (ORCPT ); Tue, 3 Aug 2021 00:24:07 -0400 Received: from gandalf.local.home (cpe-66-24-58-225.stny.res.rr.com [66.24.58.225]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id DD32D6104F; Tue, 3 Aug 2021 04:23:56 +0000 (UTC) Received: from rostedt by gandalf.local.home with local (Exim 4.94.2) (envelope-from ) id 1mAly7-002qn7-Nw; Tue, 03 Aug 2021 00:23:55 -0400 From: Steven Rostedt To: linux-trace-devel@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Tom Zanussi , Daniel Bristot de Oliveira , Masami Hiramatsu , Namhyung Kim , linux-rt-users , Clark Williams , "Steven Rostedt (VMware)" Subject: [PATCH v2 03/21] libtracefs: Add comparing start and end fields in tracefs_sql() Date: Tue, 3 Aug 2021 00:23:29 -0400 Message-Id: <20210803042347.679499-4-rostedt@goodmis.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210803042347.679499-1-rostedt@goodmis.org> References: <20210803042347.679499-1-rostedt@goodmis.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-rt-users@vger.kernel.org From: "Steven Rostedt (VMware)" Add comparing a field and showing the differences between start and end for tracefs_sql(). For example: SELECT (end.common_timestamp.usecs - start.common_timestamp.usecs) AS lat FROM sched_waking AS start JOIN sched_switch AS end ON start.pid = stop.next_pid Signed-off-by: Steven Rostedt (VMware) --- src/sqlhist-parse.h | 1 + src/sqlhist.y | 16 ++++++++ src/tracefs-sqlhist.c | 85 ++++++++++++++++++++++++++++++++++++++++++- 3 files changed, 101 insertions(+), 1 deletion(-) diff --git a/src/sqlhist-parse.h b/src/sqlhist-parse.h index aa5232eea451..aeb1738d693f 100644 --- a/src/sqlhist-parse.h +++ b/src/sqlhist-parse.h @@ -58,6 +58,7 @@ int table_start(struct sqlhist_bison *sb); void *add_field(struct sqlhist_bison *sb, const char *field, const char *label); int add_match(struct sqlhist_bison *sb, void *A, void *B); +void *add_compare(struct sqlhist_bison *sb, void *A, void *B, enum compare_type type); int add_selection(struct sqlhist_bison *sb, void *item, const char *label); int add_from(struct sqlhist_bison *sb, void *item); diff --git a/src/sqlhist.y b/src/sqlhist.y index ecb0a0ed44b3..1ba3bf62ee43 100644 --- a/src/sqlhist.y +++ b/src/sqlhist.y @@ -48,6 +48,7 @@ extern void yyerror(char *fmt, ...); %type name label %type selection_expr field item named_field join_clause +%type selection_addition %% @@ -85,6 +86,21 @@ selection : selection_expr : field | '(' field ')' { $$ = $2; } + | selection_addition + | '(' selection_addition ')' { $$ = $2; } + ; + +selection_addition : + field '+' field + { + $$ = add_compare(sb, $1, $3, COMPARE_ADD); + CHECK_RETURN_PTR($$); + } + | field '-' field + { + $$ = add_compare(sb, $1, $3, COMPARE_SUB); + CHECK_RETURN_PTR($$); + } ; item : diff --git a/src/tracefs-sqlhist.c b/src/tracefs-sqlhist.c index 7ec0c11b902e..cf2661773679 100644 --- a/src/tracefs-sqlhist.c +++ b/src/tracefs-sqlhist.c @@ -42,17 +42,32 @@ struct field { const char *field; }; +struct filter { + enum filter_type type; + struct expr *lval; + struct expr *rval; +}; + struct match { struct match *next; struct expr *lval; struct expr *rval; }; +struct compare { + enum compare_type type; + struct expr *lval; + struct expr *rval; + const char *name; +}; + enum expr_type { EXPR_NUMBER, EXPR_STRING, EXPR_FIELD, + EXPR_FILTER, + EXPR_COMPARE, }; struct expr { @@ -61,6 +76,8 @@ struct expr { enum expr_type type; union { struct field field; + struct filter filter; + struct compare compare; const char *string; long number; }; @@ -209,8 +226,14 @@ __hidden int add_selection(struct sqlhist_bison *sb, void *select, switch (expr->type) { case EXPR_FIELD: break; + case EXPR_COMPARE: + if (!name) + return -1; + expr->compare.name = name; + break; case EXPR_NUMBER: case EXPR_STRING: + case EXPR_FILTER: default: return -1; } @@ -277,8 +300,10 @@ static void *create_expr(enum expr_type type, struct expr **expr_p) switch (type) { case EXPR_FIELD: return &expr->field; + case EXPR_COMPARE: return &expr->compare; case EXPR_NUMBER: return &expr->number; case EXPR_STRING: return &expr->string; + case EXPR_FILTER: return &expr->filter; } return NULL; @@ -292,6 +317,9 @@ static void *create_expr(enum expr_type type, struct expr **expr_p) #define create_field(var, expr) \ __create_expr(var, struct field, FIELD, expr) +#define create_compare(var, expr) \ + __create_expr(var, struct compare, COMPARE, expr) + __hidden void *add_field(struct sqlhist_bison *sb, const char *field_name, const char *label) { @@ -331,6 +359,21 @@ __hidden int add_match(struct sqlhist_bison *sb, void *A, void *B) return 0; } +__hidden void *add_compare(struct sqlhist_bison *sb, + void *A, void *B, enum compare_type type) +{ + struct compare *compare; + struct expr *expr; + + create_compare(compare, &expr); + + compare = &expr->compare; + compare->lval = A; + compare->rval = B; + compare->type = type; + + return expr; +} __hidden int add_from(struct sqlhist_bison *sb, void *item) { @@ -522,6 +565,39 @@ static void assign_match(const char *system, const char *event, } } +static int build_compare(struct tracefs_synth *synth, + const char *system, const char *event, + struct compare *compare) +{ + const char *start_field; + const char *end_field; + struct field *lval, *rval; + enum tracefs_synth_calc calc; + int ret; + + lval = &compare->lval->field; + rval = &compare->rval->field; + + if (lval->system == system && + lval->event == event) { + start_field = lval->field; + end_field = rval->field; + calc = TRACEFS_SYNTH_DELTA_START; + } else { + start_field = rval->field; + end_field = lval->field; + calc = TRACEFS_SYNTH_DELTA_END; + } + + if (compare->type == COMPARE_ADD) + calc = TRACEFS_SYNTH_ADD; + + ret = tracefs_synth_add_compare_field(synth, start_field, + end_field, calc, + compare->name); + return ret; +} + static struct tracefs_synth *build_synth(struct tep_handle *tep, const char *name, struct sql_table *table) @@ -602,7 +678,14 @@ static struct tracefs_synth *build_synth(struct tep_handle *tep, goto free; continue; } - goto free; + + if (expr->type != EXPR_COMPARE) + goto free; + + ret = build_compare(synth, start_system, end_system, + &expr->compare); + if (ret < 0) + goto free; } return synth;