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perf annotate: Print a sorted summary of annotated overhead lines 

It's can be very annoying to scroll down perf annotated output
until we find relevant overhead.

Using the -l option, you can now have a small summary sorted per
overhead in the beginning of the output.

Example:

./perf annotate -l -k ../../vmlinux -s __lock_acquire

Sorted summary for file ../../vmlinux
----------------------------------------------

   12.04 /home/fweisbec/linux/linux-2.6-tip/kernel/lockdep.c:1653
    4.61 /home/fweisbec/linux/linux-2.6-tip/kernel/lockdep.c:1740
    3.77 /home/fweisbec/linux/linux-2.6-tip/kernel/lockdep.c:1775
    3.56 /home/fweisbec/linux/linux-2.6-tip/kernel/lockdep.c:1653
    2.93 /home/fweisbec/linux/linux-2.6-tip/arch/x86/include/asm/irqflags.h:15
    2.83 /home/fweisbec/linux/linux-2.6-tip/kernel/lockdep.c:2545
    2.30 /home/fweisbec/linux/linux-2.6-tip/kernel/lockdep.c:2594
    2.20 /home/fweisbec/linux/linux-2.6-tip/kernel/lockdep.c:2388
    2.20 /home/fweisbec/linux/linux-2.6-tip/kernel/lockdep.c:730
    2.09 /home/fweisbec/linux/linux-2.6-tip/kernel/lockdep.c:730
    2.09 /home/fweisbec/linux/linux-2.6-tip/kernel/lockdep.c:138
    1.88 /home/fweisbec/linux/linux-2.6-tip/kernel/lockdep.c:2548
    1.47 /home/fweisbec/linux/linux-2.6-tip/arch/x86/include/asm/irqflags.h:15
    1.36 /home/fweisbec/linux/linux-2.6-tip/kernel/lockdep.c:2594
    1.36 /home/fweisbec/linux/linux-2.6-tip/kernel/lockdep.c:730
    1.26 /home/fweisbec/linux/linux-2.6-tip/kernel/lockdep.c:1654
    1.26 /home/fweisbec/linux/linux-2.6-tip/kernel/lockdep.c:1653
    1.15 /home/fweisbec/linux/linux-2.6-tip/kernel/lockdep.c:2592
    1.15 /home/fweisbec/linux/linux-2.6-tip/kernel/lockdep.c:1740
    1.15 /home/fweisbec/linux/linux-2.6-tip/kernel/lockdep.c:1740

[...]

Only overhead over 0.5% are summarized.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <1244844682-12928-2-git-send-email-fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Frederic Weisbecker 2009-06-13 00:11:22 +02:00 committed by Ingo Molnar
parent 301406b9c6
commit 971738f366
1 changed files with 90 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

111
tools/perf/builtin-annotate.c
View File

@ -25,6 +25,10 @@
#define SHOW_USER 2
#define SHOW_HV 4
#define MIN_GREEN 0.5
#define MIN_RED 5.0
static char const *input_name = "perf.data";
static char *vmlinux = "vmlinux";
@ -88,6 +92,7 @@ typedef union event_union {
struct sym_ext {
struct rb_node node;
double percent;
char *path;
};
@ -1038,6 +1043,24 @@ process_event(event_t *event, unsigned long offset, unsigned long head)
return 0;
}
static char *get_color(double percent)
{
char *color = PERF_COLOR_NORMAL;
/*
* We color high-overhead entries in red, mid-overhead
* entries in green - and keep the low overhead places
* normal:
*/
if (percent >= MIN_RED)
color = PERF_COLOR_RED;
else {
if (percent > MIN_GREEN)
color = PERF_COLOR_GREEN;
}
return color;
}
static int
parse_line(FILE *file, struct symbol *sym, __u64 start, __u64 len)
{
@ -1086,7 +1109,7 @@ parse_line(FILE *file, struct symbol *sym, __u64 start, __u64 len)
const char *path = NULL;
unsigned int hits = 0;
double percent = 0.0;
char *color = PERF_COLOR_NORMAL;
char *color;
struct sym_ext *sym_ext = sym->priv;
offset = line_ip - start;
@ -1099,17 +1122,7 @@ parse_line(FILE *file, struct symbol *sym, __u64 start, __u64 len)
} else if (sym->hist_sum)
percent = 100.0 * hits / sym->hist_sum;
/*
* We color high-overhead entries in red, mid-overhead
* entries in green - and keep the low overhead places
* normal:
*/
if (percent >= 5.0)
color = PERF_COLOR_RED;
else {
if (percent > 0.5)
color = PERF_COLOR_GREEN;
}
color = get_color(percent);
/*
* Also color the filename and line if needed, with
@ -1138,6 +1151,28 @@ parse_line(FILE *file, struct symbol *sym, __u64 start, __u64 len)
return 0;
}
static struct rb_root root_sym_ext;
static void insert_source_line(struct sym_ext *sym_ext)
{
struct sym_ext *iter;
struct rb_node **p = &root_sym_ext.rb_node;
struct rb_node *parent = NULL;
while (*p != NULL) {
parent = *p;
iter = rb_entry(parent, struct sym_ext, node);
if (sym_ext->percent > iter->percent)
p = &(*p)->rb_left;
else
p = &(*p)->rb_right;
}
rb_link_node(&sym_ext->node, parent, p);
rb_insert_color(&sym_ext->node, &root_sym_ext);
}
static void free_source_line(struct symbol *sym, int len)
{
struct sym_ext *sym_ext = sym->priv;
@ -1151,6 +1186,7 @@ static void free_source_line(struct symbol *sym, int len)
free(sym_ext);
sym->priv = NULL;
root_sym_ext = RB_ROOT;
}
/* Get the filename:line for the colored entries */
@ -1193,12 +1229,42 @@ static void get_source_line(struct symbol *sym, __u64 start, int len)
goto next;
strcpy(sym_ext[i].path, path);
insert_source_line(&sym_ext[i]);
next:
pclose(fp);
}
}
static void print_summary(char *filename)
{
struct sym_ext *sym_ext;
struct rb_node *node;
printf("\nSorted summary for file %s\n", filename);
printf("----------------------------------------------\n\n");
if (RB_EMPTY_ROOT(&root_sym_ext)) {
printf(" Nothing higher than %1.1f%%\n", MIN_GREEN);
return;
}
node = rb_first(&root_sym_ext);
while (node) {
double percent;
char *color;
char *path;
sym_ext = rb_entry(node, struct sym_ext, node);
percent = sym_ext->percent;
color = get_color(percent);
path = sym_ext->path;
color_fprintf(stdout, color, " %7.2f %s", percent, path);
node = rb_next(node);
}
}
static void annotate_sym(struct dso *dso, struct symbol *sym)
{
char *filename = dso->name;
@ -1211,13 +1277,6 @@ static void annotate_sym(struct dso *dso, struct symbol *sym)
if (dso == kernel_dso)
filename = vmlinux;
printf("\n------------------------------------------------\n");
printf(" Percent | Source code & Disassembly of %s\n", filename);
printf("------------------------------------------------\n");
if (verbose >= 2)
printf("annotating [%p] %30s : [%p] %30s\n", dso, dso->name, sym, sym->name);
start = sym->obj_start;
if (!start)
start = sym->start;
@ -1225,8 +1284,17 @@ static void annotate_sym(struct dso *dso, struct symbol *sym)
end = start + sym->end - sym->start + 1;
len = sym->end - sym->start;
if (print_line)
if (print_line) {
get_source_line(sym, start, len);
print_summary(filename);
}
printf("\n\n------------------------------------------------\n");
printf(" Percent | Source code & Disassembly of %s\n", filename);
printf("------------------------------------------------\n");
if (verbose >= 2)
printf("annotating [%p] %30s : [%p] %30s\n", dso, dso->name, sym, sym->name);
sprintf(command, "objdump --start-address=0x%016Lx --stop-address=0x%016Lx -dS %s", (__u64)start, (__u64)end, filename);
@ -1243,7 +1311,8 @@ static void annotate_sym(struct dso *dso, struct symbol *sym)
}
pclose(file);
free_source_line(sym, len);
if (print_line)
free_source_line(sym, len);
}
static void find_annotations(void)