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Message-Id: <1410513954-28909-6-git-send-email-linux@rasmusvillemoes.dk>
Date: Fri, 12 Sep 2014 11:25:53 +0200
From: Rasmus Villemoes <linux@...musvillemoes.dk>
To: Julia Lawall <Julia.Lawall@...6.fr>,
Steven Rostedt <rostedt@...dmis.org>,
Ingo Molnar <mingo@...hat.com>
Cc: linux-kernel@...r.kernel.org,
Rasmus Villemoes <linux@...musvillemoes.dk>
Subject: [PATCH 5/6] trace: Merge consecutive seq_puts calls
Consecutive seq_puts calls with literal strings can be merged to a
single call. This reduces the size of the generated code, and can also
lead to slight .rodata reduction (because of fewer nul and padding
bytes). It should also shave a off a few clock cycles.
Signed-off-by: Rasmus Villemoes <linux@...musvillemoes.dk>
---
kernel/trace/trace.c | 72 +++++++++++++++++++++++++--------------------
kernel/trace/trace_branch.c | 13 ++++----
2 files changed, 46 insertions(+), 39 deletions(-)
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 77bb64f..14fb877 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -2508,14 +2508,15 @@ get_total_entries(struct trace_buffer *buf,
static void print_lat_help_header(struct seq_file *m)
{
- seq_puts(m, "# _------=> CPU# \n");
- seq_puts(m, "# / _-----=> irqs-off \n");
- seq_puts(m, "# | / _----=> need-resched \n");
- seq_puts(m, "# || / _---=> hardirq/softirq \n");
- seq_puts(m, "# ||| / _--=> preempt-depth \n");
- seq_puts(m, "# |||| / delay \n");
- seq_puts(m, "# cmd pid ||||| time | caller \n");
- seq_puts(m, "# \\ / ||||| \\ | / \n");
+ seq_puts(m,
+ "# _------=> CPU# \n"
+ "# / _-----=> irqs-off \n"
+ "# | / _----=> need-resched \n"
+ "# || / _---=> hardirq/softirq \n"
+ "# ||| / _--=> preempt-depth \n"
+ "# |||| / delay \n"
+ "# cmd pid ||||| time | caller \n"
+ "# \\ / ||||| \\ | / \n");
}
static void print_event_info(struct trace_buffer *buf, struct seq_file *m)
@@ -2532,20 +2533,22 @@ static void print_event_info(struct trace_buffer *buf, struct seq_file *m)
static void print_func_help_header(struct trace_buffer *buf, struct seq_file *m)
{
print_event_info(buf, m);
- seq_puts(m, "# TASK-PID CPU# TIMESTAMP FUNCTION\n");
- seq_puts(m, "# | | | | |\n");
+ seq_puts(m,
+ "# TASK-PID CPU# TIMESTAMP FUNCTION\n"
+ "# | | | | |\n");
}
static void print_func_help_header_irq(struct trace_buffer *buf, struct seq_file *m)
{
print_event_info(buf, m);
- seq_puts(m, "# _-----=> irqs-off\n");
- seq_puts(m, "# / _----=> need-resched\n");
- seq_puts(m, "# | / _---=> hardirq/softirq\n");
- seq_puts(m, "# || / _--=> preempt-depth\n");
- seq_puts(m, "# ||| / delay\n");
- seq_puts(m, "# TASK-PID CPU# |||| TIMESTAMP FUNCTION\n");
- seq_puts(m, "# | | | |||| | |\n");
+ seq_puts(m,
+ "# _-----=> irqs-off\n"
+ "# / _----=> need-resched\n"
+ "# | / _---=> hardirq/softirq\n"
+ "# || / _--=> preempt-depth\n"
+ "# ||| / delay\n"
+ "# TASK-PID CPU# |||| TIMESTAMP FUNCTION\n"
+ "# | | | |||| | |\n");
}
void
@@ -2859,34 +2862,39 @@ static void test_ftrace_alive(struct seq_file *m)
{
if (!ftrace_is_dead())
return;
- seq_puts(m, "# WARNING: FUNCTION TRACING IS CORRUPTED\n");
- seq_puts(m, "# MAY BE MISSING FUNCTION EVENTS\n");
+ seq_puts(m,
+ "# WARNING: FUNCTION TRACING IS CORRUPTED\n"
+ "# MAY BE MISSING FUNCTION EVENTS\n");
}
#ifdef CONFIG_TRACER_MAX_TRACE
static void show_snapshot_main_help(struct seq_file *m)
{
- seq_puts(m, "# echo 0 > snapshot : Clears and frees snapshot buffer\n");
- seq_puts(m, "# echo 1 > snapshot : Allocates snapshot buffer, if not already allocated.\n");
- seq_puts(m, "# Takes a snapshot of the main buffer.\n");
- seq_puts(m, "# echo 2 > snapshot : Clears snapshot buffer (but does not allocate or free)\n");
- seq_puts(m, "# (Doesn't have to be '2' works with any number that\n");
- seq_puts(m, "# is not a '0' or '1')\n");
+ seq_puts(m,
+ "# echo 0 > snapshot : Clears and frees snapshot buffer\n"
+ "# echo 1 > snapshot : Allocates snapshot buffer, if not already allocated.\n"
+ "# Takes a snapshot of the main buffer.\n"
+ "# echo 2 > snapshot : Clears snapshot buffer (but does not allocate or free)\n"
+ "# (Doesn't have to be '2' works with any number that\n"
+ "# is not a '0' or '1')\n");
}
static void show_snapshot_percpu_help(struct seq_file *m)
{
seq_puts(m, "# echo 0 > snapshot : Invalid for per_cpu snapshot file.\n");
#ifdef CONFIG_RING_BUFFER_ALLOW_SWAP
- seq_puts(m, "# echo 1 > snapshot : Allocates snapshot buffer, if not already allocated.\n");
- seq_puts(m, "# Takes a snapshot of the main buffer for this cpu.\n");
+ seq_puts(m,
+ "# echo 1 > snapshot : Allocates snapshot buffer, if not already allocated.\n"
+ "# Takes a snapshot of the main buffer for this cpu.\n");
#else
- seq_puts(m, "# echo 1 > snapshot : Not supported with this kernel.\n");
- seq_puts(m, "# Must use main snapshot file to allocate.\n");
+ seq_puts(m,
+ "# echo 1 > snapshot : Not supported with this kernel.\n"
+ "# Must use main snapshot file to allocate.\n");
#endif
- seq_puts(m, "# echo 2 > snapshot : Clears this cpu's snapshot buffer (but does not allocate)\n");
- seq_puts(m, "# (Doesn't have to be '2' works with any number that\n");
- seq_puts(m, "# is not a '0' or '1')\n");
+ seq_puts(m,
+ "# echo 2 > snapshot : Clears this cpu's snapshot buffer (but does not allocate)\n"
+ "# (Doesn't have to be '2' works with any number that\n"
+ "# is not a '0' or '1')\n");
}
static void print_snapshot_help(struct seq_file *m, struct trace_iterator *iter)
diff --git a/kernel/trace/trace_branch.c b/kernel/trace/trace_branch.c
index c38f8fa..c7e1567 100644
--- a/kernel/trace/trace_branch.c
+++ b/kernel/trace/trace_branch.c
@@ -163,10 +163,9 @@ static enum print_line_t trace_branch_print(struct trace_iterator *iter,
static void branch_print_header(struct seq_file *s)
{
- seq_puts(s, "# TASK-PID CPU# TIMESTAMP CORRECT"
- " FUNC:FILE:LINE\n");
- seq_puts(s, "# | | | | | "
- " |\n");
+ seq_puts(s,
+ "# TASK-PID CPU# TIMESTAMP CORRECT" " FUNC:FILE:LINE\n"
+ "# | | | | | " " |\n");
}
static struct trace_event_functions trace_branch_funcs = {
@@ -233,8 +232,8 @@ extern unsigned long __stop_annotated_branch_profile[];
static int annotated_branch_stat_headers(struct seq_file *m)
{
- seq_puts(m, " correct incorrect % ");
seq_puts(m,
+ " correct incorrect % "
" Function "
" File Line\n"
" ------- --------- - "
@@ -363,9 +362,9 @@ extern unsigned long __stop_branch_profile[];
static int all_branch_stat_headers(struct seq_file *m)
{
- seq_puts(m, " miss hit % ");
seq_puts(m,
- " Function " " File Line\n" " ------- --------- - " " -------- " " ---- ----\n");
+ " miss hit % " " Function " " File Line\n"
+ " ------- --------- - " " -------- " " ---- ----\n");
return 0;
}
--
2.0.4
--
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