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tracing: Replace seq_printf by simpler equivalents 

Using seq_printf to print a simple string or a single character is a
lot more expensive than it needs to be, since seq_puts and seq_putc
exist.

These patches do

  seq_printf(m, s) -> seq_puts(m, s)
  seq_printf(m, "%s", s) -> seq_puts(m, s)
  seq_printf(m, "%c", c) -> seq_putc(m, c)

Subsequent patches will simplify further.

Link: http://lkml.kernel.org/r/1415479332-25944-2-git-send-email-linux@rasmusvillemoes.dk

Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Rasmus Villemoes 2014-11-08 21:42:10 +01:00 committed by Steven Rostedt
parent 8520dedbbf
commit fa6f0cc751
9 changed files with 71 additions and 71 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

30
kernel/trace/ftrace.c
View File

@ -571,13 +571,13 @@ static int function_stat_cmp(void *p1, void *p2)
static int function_stat_headers(struct seq_file *m)
{
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
seq_printf(m, " Function "
"Hit Time Avg s^2\n"
" -------- "
"--- ---- --- ---\n");
seq_puts(m, " Function "
"Hit Time Avg s^2\n"
" -------- "
"--- ---- --- ---\n");
#else
seq_printf(m, " Function Hit\n"
" -------- ---\n");
seq_puts(m, " Function Hit\n"
" -------- ---\n");
#endif
return 0;
}
@ -604,7 +604,7 @@ static int function_stat_show(struct seq_file *m, void *v)
seq_printf(m, " %-30.30s %10lu", str, rec->counter);
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
seq_printf(m, " ");
seq_puts(m, " ");
avg = rec->time;
do_div(avg, rec->counter);
@ -3006,9 +3006,9 @@ static int t_show(struct seq_file *m, void *v)
if (iter->flags & FTRACE_ITER_PRINTALL) {
if (iter->flags & FTRACE_ITER_NOTRACE)
seq_printf(m, "#### no functions disabled ####\n");
seq_puts(m, "#### no functions disabled ####\n");
else
seq_printf(m, "#### all functions enabled ####\n");
seq_puts(m, "#### all functions enabled ####\n");
return 0;
}
@ -3030,13 +3030,13 @@ static int t_show(struct seq_file *m, void *v)
seq_printf(m, "\ttramp: %pS",
(void *)ops->trampoline);
else
seq_printf(m, "\ttramp: ERROR!");
seq_puts(m, "\ttramp: ERROR!");
}
add_trampoline_func(m, ops, rec);
}
seq_printf(m, "\n");
seq_putc(m, '\n');
return 0;
}
@ -4233,9 +4233,9 @@ static int g_show(struct seq_file *m, void *v)
struct ftrace_graph_data *fgd = m->private;
if (fgd->table == ftrace_graph_funcs)
seq_printf(m, "#### all functions enabled ####\n");
seq_puts(m, "#### all functions enabled ####\n");
else
seq_printf(m, "#### no functions disabled ####\n");
seq_puts(m, "#### no functions disabled ####\n");
return 0;
}
@ -5155,12 +5155,12 @@ static int fpid_show(struct seq_file *m, void *v)
const struct ftrace_pid *fpid = list_entry(v, struct ftrace_pid, list);
if (v == (void *)1) {
seq_printf(m, "no pid\n");
seq_puts(m, "no pid\n");
return 0;
}
if (fpid->pid == ftrace_swapper_pid)
seq_printf(m, "swapper tasks\n");
seq_puts(m, "swapper tasks\n");
else
seq_printf(m, "%u\n", pid_vnr(fpid->pid));

44
kernel/trace/trace.c
View File

@ -2860,44 +2860,44 @@ static void test_ftrace_alive(struct seq_file *m)
{
if (!ftrace_is_dead())
return;
seq_printf(m, "# WARNING: FUNCTION TRACING IS CORRUPTED\n");
seq_printf(m, "# MAY BE MISSING FUNCTION EVENTS\n");
seq_puts(m, "# WARNING: FUNCTION TRACING IS CORRUPTED\n");
seq_puts(m, "# MAY BE MISSING FUNCTION EVENTS\n");
}
#ifdef CONFIG_TRACER_MAX_TRACE
static void show_snapshot_main_help(struct seq_file *m)
{
seq_printf(m, "# echo 0 > snapshot : Clears and frees snapshot buffer\n");
seq_printf(m, "# echo 1 > snapshot : Allocates snapshot buffer, if not already allocated.\n");
seq_printf(m, "# Takes a snapshot of the main buffer.\n");
seq_printf(m, "# echo 2 > snapshot : Clears snapshot buffer (but does not allocate or free)\n");
seq_printf(m, "# (Doesn't have to be '2' works with any number that\n");
seq_printf(m, "# is not a '0' or '1')\n");
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");
}
static void show_snapshot_percpu_help(struct seq_file *m)
{
seq_printf(m, "# echo 0 > snapshot : Invalid for per_cpu snapshot file.\n");
seq_puts(m, "# echo 0 > snapshot : Invalid for per_cpu snapshot file.\n");
#ifdef CONFIG_RING_BUFFER_ALLOW_SWAP
seq_printf(m, "# echo 1 > snapshot : Allocates snapshot buffer, if not already allocated.\n");
seq_printf(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");
seq_puts(m, "# Takes a snapshot of the main buffer for this cpu.\n");
#else
seq_printf(m, "# echo 1 > snapshot : Not supported with this kernel.\n");
seq_printf(m, "# Must use main snapshot file to allocate.\n");
seq_puts(m, "# echo 1 > snapshot : Not supported with this kernel.\n");
seq_puts(m, "# Must use main snapshot file to allocate.\n");
#endif
seq_printf(m, "# echo 2 > snapshot : Clears this cpu's snapshot buffer (but does not allocate)\n");
seq_printf(m, "# (Doesn't have to be '2' works with any number that\n");
seq_printf(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");
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");
}
static void print_snapshot_help(struct seq_file *m, struct trace_iterator *iter)
{
if (iter->tr->allocated_snapshot)
seq_printf(m, "#\n# * Snapshot is allocated *\n#\n");
seq_puts(m, "#\n# * Snapshot is allocated *\n#\n");
else
seq_printf(m, "#\n# * Snapshot is freed *\n#\n");
seq_puts(m, "#\n# * Snapshot is freed *\n#\n");
seq_printf(m, "# Snapshot commands:\n");
seq_puts(m, "# Snapshot commands:\n");
if (iter->cpu_file == RING_BUFFER_ALL_CPUS)
show_snapshot_main_help(m);
else
@ -3251,7 +3251,7 @@ static int t_show(struct seq_file *m, void *v)
if (!t)
return 0;
seq_printf(m, "%s", t->name);
seq_puts(m, t->name);
if (t->next)
seq_putc(m, ' ');
else
@ -5753,10 +5753,10 @@ ftrace_snapshot_print(struct seq_file *m, unsigned long ip,
seq_printf(m, "%ps:", (void *)ip);
seq_printf(m, "snapshot");
seq_puts(m, "snapshot");
if (count == -1)
seq_printf(m, ":unlimited\n");
seq_puts(m, ":unlimited\n");
else
seq_printf(m, ":count=%ld\n", count);

26
kernel/trace/trace_branch.c
View File

@ -233,12 +233,12 @@ extern unsigned long __stop_annotated_branch_profile[];
static int annotated_branch_stat_headers(struct seq_file *m)
{
seq_printf(m, " correct incorrect %% ");
seq_printf(m, " Function "
" File Line\n"
" ------- --------- - "
" -------- "
" ---- ----\n");
seq_puts(m, " correct incorrect % ");
seq_puts(m, " Function "
" File Line\n"
" ------- --------- - "
" -------- "
" ---- ----\n");
return 0;
}
@ -274,7 +274,7 @@ static int branch_stat_show(struct seq_file *m, void *v)
seq_printf(m, "%8lu %8lu ", p->correct, p->incorrect);
if (percent < 0)
seq_printf(m, " X ");
seq_puts(m, " X ");
else
seq_printf(m, "%3ld ", percent);
seq_printf(m, "%-30.30s %-20.20s %d\n", p->func, f, p->line);
@ -362,12 +362,12 @@ extern unsigned long __stop_branch_profile[];
static int all_branch_stat_headers(struct seq_file *m)
{
seq_printf(m, " miss hit %% ");
seq_printf(m, " Function "
" File Line\n"
" ------- --------- - "
" -------- "
" ---- ----\n");
seq_puts(m, " miss hit % ");
seq_puts(m, " Function "
" File Line\n"
" ------- --------- - "
" -------- "
" ---- ----\n");
return 0;
}

4
kernel/trace/trace_events.c
View File

@ -918,7 +918,7 @@ static int f_show(struct seq_file *m, void *v)
case FORMAT_HEADER:
seq_printf(m, "name: %s\n", ftrace_event_name(call));
seq_printf(m, "ID: %d\n", call->event.type);
seq_printf(m, "format:\n");
seq_puts(m, "format:\n");
return 0;
case FORMAT_FIELD_SEPERATOR:
@ -1988,7 +1988,7 @@ event_enable_print(struct seq_file *m, unsigned long ip,
ftrace_event_name(data->file->event_call));
if (data->count == -1)
seq_printf(m, ":unlimited\n");
seq_puts(m, ":unlimited\n");
else
seq_printf(m, ":count=%ld\n", data->count);

2
kernel/trace/trace_events_trigger.c
View File

@ -373,7 +373,7 @@ event_trigger_print(const char *name, struct seq_file *m,
{
long count = (long)data;
seq_printf(m, "%s", name);
seq_puts(m, name);
if (count == -1)
seq_puts(m, ":unlimited");

2
kernel/trace/trace_functions.c
View File

@ -361,7 +361,7 @@ ftrace_probe_print(const char *name, struct seq_file *m,
seq_printf(m, "%ps:%s", (void *)ip, name);
if (count == -1)
seq_printf(m, ":unlimited\n");
seq_puts(m, ":unlimited\n");
else
seq_printf(m, ":count=%ld\n", count);

28
kernel/trace/trace_functions_graph.c
View File

@ -1407,32 +1407,32 @@ static void __print_graph_headers_flags(struct seq_file *s, u32 flags)
print_lat_header(s, flags);
/* 1st line */
seq_printf(s, "#");
seq_puts(s, "#");
if (flags & TRACE_GRAPH_PRINT_ABS_TIME)
seq_printf(s, " TIME ");
seq_puts(s, " TIME ");
if (flags & TRACE_GRAPH_PRINT_CPU)
seq_printf(s, " CPU");
seq_puts(s, " CPU");
if (flags & TRACE_GRAPH_PRINT_PROC)
seq_printf(s, " TASK/PID ");
seq_puts(s, " TASK/PID ");
if (lat)
seq_printf(s, "||||");
seq_puts(s, "||||");
if (flags & TRACE_GRAPH_PRINT_DURATION)
seq_printf(s, " DURATION ");
seq_printf(s, " FUNCTION CALLS\n");
seq_puts(s, " DURATION ");
seq_puts(s, " FUNCTION CALLS\n");
/* 2nd line */
seq_printf(s, "#");
seq_puts(s, "#");
if (flags & TRACE_GRAPH_PRINT_ABS_TIME)
seq_printf(s, " | ");
seq_puts(s, " | ");
if (flags & TRACE_GRAPH_PRINT_CPU)
seq_printf(s, " | ");
seq_puts(s, " | ");
if (flags & TRACE_GRAPH_PRINT_PROC)
seq_printf(s, " | | ");
seq_puts(s, " | | ");
if (lat)
seq_printf(s, "||||");
seq_puts(s, "||||");
if (flags & TRACE_GRAPH_PRINT_DURATION)
seq_printf(s, " | | ");
seq_printf(s, " | | | |\n");
seq_puts(s, " | | ");
seq_puts(s, " | | | |\n");
}
static void print_graph_headers(struct seq_file *s)

4
kernel/trace/trace_kprobe.c
View File

@ -826,7 +826,7 @@ static int probes_seq_show(struct seq_file *m, void *v)
struct trace_kprobe *tk = v;
int i;
seq_printf(m, "%c", trace_kprobe_is_return(tk) ? 'r' : 'p');
seq_putc(m, trace_kprobe_is_return(tk) ? 'r' : 'p');
seq_printf(m, ":%s/%s", tk->tp.call.class->system,
ftrace_event_name(&tk->tp.call));
@ -840,7 +840,7 @@ static int probes_seq_show(struct seq_file *m, void *v)
for (i = 0; i < tk->tp.nr_args; i++)
seq_printf(m, " %s=%s", tk->tp.args[i].name, tk->tp.args[i].comm);
seq_printf(m, "\n");
seq_putc(m, '\n');
return 0;
}

2
kernel/trace/trace_uprobe.c
View File

@ -606,7 +606,7 @@ static int probes_seq_show(struct seq_file *m, void *v)
for (i = 0; i < tu->tp.nr_args; i++)
seq_printf(m, " %s=%s", tu->tp.args[i].name, tu->tp.args[i].comm);
seq_printf(m, "\n");
seq_putc(m, '\n');
return 0;
}