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Commit d79ac28f authored by Rasmus Villemoes's avatar Rasmus Villemoes Committed by Steven Rostedt
Browse files

tracing: 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.

Link: http://lkml.kernel.org/r/1415479332-25944-3-git-send-email-linux@rasmusvillemoes.dk



Signed-off-by: default avatarRasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: default avatarSteven Rostedt <rostedt@goodmis.org>
parent fa6f0cc7

kernel/trace/trace.c

+32 −32
Original line number Diff line number Diff line
@@ -2509,14 +2509,14 @@ 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)
@@ -2533,20 +2533,20 @@ 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
@@ -2860,34 +2860,34 @@ 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)

kernel/trace/trace_branch.c

+7 −7
Original line number Diff line number Diff line
@@ -164,8 +164,8 @@ 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, "#              | |       |          |         |   "

		    "  FUNC:FILE:LINE\n"

		    "#              | |       |          |         |   "

		    "    |\n");

}
@@ -233,8 +233,8 @@ 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, "       Function                "

	seq_puts(m, " correct incorrect  % "

		    "       Function                "

		    "  File              Line\n"

		    " ------- ---------  - "

		    "       --------                "
@@ -362,8 +362,8 @@ 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                "

	seq_puts(m, "   miss      hit    % "

		    "       Function                "

		    "  File              Line\n"

		    " ------- ---------  - "

		    "       --------                "