linux-kernel - [patch 2/6] x86, ftrace, hw-branch-tracer: change trace format

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Message-ID: <20090119102916.A18795@sedona.ch.intel.com>
Date:	Mon, 19 Jan 2009 10:29:16 +0100
From:	Markus Metzger <markus.t.metzger@...el.com>
To:	linux-kernel@...r.kernel.org, mingo@...e.hu, tglx@...utronix.de,
	hpa@...or.com
Cc:	markus.t.metzger@...el.com, markus.t.metzger@...il.com,
	srostedt@...hat.com
Subject: [patch 2/6] x86, ftrace, hw-branch-tracer: change trace format

Change the hw-branch-tracer format.

Signed-off-by: Markus Metzger <markus.t.metzger@...el.com>
---

Index: ftrace/kernel/trace/trace_hw_branches.c
===================================================================
--- ftrace.orig/kernel/trace/trace_hw_branches.c	2009-01-14 15:25:42.000000000 +0100
+++ ftrace/kernel/trace/trace_hw_branches.c	2009-01-14 15:26:07.000000000 +0100
@@ -142,10 +142,7 @@
 
 static void bts_trace_print_header(struct seq_file *m)
 {
-	seq_puts(m,
-		 "# CPU#        FROM                   TO         FUNCTION\n");
-	seq_puts(m,
-		 "#  |           |                     |             |\n");
+	seq_puts(m, "# CPU#        TO  <-  FROM\n");
 }
 
 static enum print_line_t bts_trace_print_line(struct trace_iterator *iter)
@@ -153,15 +150,15 @@
 	struct trace_entry *entry = iter->ent;
 	struct trace_seq *seq = &iter->seq;
 	struct hw_branch_entry *it;
+	unsigned long symflags = TRACE_ITER_SYM_OFFSET;
 
 	trace_assign_type(it, entry);
 
 	if (entry->type == TRACE_HW_BRANCHES) {
 		if (trace_seq_printf(seq, "%4d  ", entry->cpu) &&
-		    trace_seq_printf(seq, "0x%016llx -> 0x%016llx ",
-				     it->from, it->to) &&
-		    (!it->from ||
-		     seq_print_ip_sym(seq, it->from, /* sym_flags = */ 0)) &&
+		    seq_print_ip_sym(seq, it->to, symflags) &&
+		    trace_seq_printf(seq, "\t  <-  ") &&
+		    seq_print_ip_sym(seq, it->from, symflags) &&
 		    trace_seq_printf(seq, "\n"))
 			return TRACE_TYPE_HANDLED;
 		return TRACE_TYPE_PARTIAL_LINE;;
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