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perf tools: Add latency format to trace output 

Add the irqs disabled, preemption count, need resched, and other
info that is shown in the latency format of ftrace.

 # perf trace -l
    perf-16457   2..s2. 53636.260344: kmem_cache_free: call_site=ffffffff811198f
    perf-16457   2..s2. 53636.264330: kmem_cache_free: call_site=ffffffff811198f
    perf-16457   2d.s4. 53636.300006: kmem_cache_free: call_site=ffffffff810d889

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <20091014194400.076588953@goodmis.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Steven Rostedt 2009-10-14 15:43:42 -04:00 committed by Ingo Molnar
parent 0d1da915c7
commit cda48461c7
3 changed files with 115 additions and 20 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
tools/perf/builtin-trace.c
View File

@ -144,6 +144,8 @@ static const struct option options[] = {
"dump raw trace in ASCII"),
OPT_BOOLEAN('v', "verbose", &verbose,
"be more verbose (show symbol address, etc)"),
OPT_BOOLEAN('l', "latency", &latency_format,
"show latency attributes (irqs/preemption disabled, etc)"),
OPT_END()
};

122
tools/perf/util/trace-event-parse.c
View File

@ -40,6 +40,8 @@ int header_page_size_size;
int header_page_data_offset;
int header_page_data_size;
int latency_format;
static char *input_buf;
static unsigned long long input_buf_ptr;
static unsigned long long input_buf_siz;
@ -1928,37 +1930,67 @@ static int get_common_info(const char *type, int *offset, int *size)
return 0;
}
static int __parse_common(void *data, int *size, int *offset,
char *name)
{
int ret;
if (!*size) {
ret = get_common_info(name, offset, size);
if (ret < 0)
return ret;
}
return read_size(data + *offset, *size);
}
int trace_parse_common_type(void *data)
{
static int type_offset;
static int type_size;
int ret;
if (!type_size) {
ret = get_common_info("common_type",
&type_offset,
&type_size);
if (ret < 0)
return ret;
}
return read_size(data + type_offset, type_size);
return __parse_common(data, &type_size, &type_offset,
(char *)"common_type");
}
static int parse_common_pid(void *data)
{
static int pid_offset;
static int pid_size;
return __parse_common(data, &pid_size, &pid_offset,
(char *)"common_pid");
}
static int parse_common_pc(void *data)
{
static int pc_offset;
static int pc_size;
return __parse_common(data, &pc_size, &pc_offset,
(char *)"common_preempt_count");
}
static int parse_common_flags(void *data)
{
static int flags_offset;
static int flags_size;
return __parse_common(data, &flags_size, &flags_offset,
(char *)"common_flags");
}
static int parse_common_lock_depth(void *data)
{
static int ld_offset;
static int ld_size;
int ret;
if (!pid_size) {
ret = get_common_info("common_pid",
&pid_offset,
&pid_size);
if (ret < 0)
return ret;
}
ret = __parse_common(data, &ld_size, &ld_offset,
(char *)"common_lock_depth");
if (ret < 0)
return -1;
return read_size(data + pid_offset, pid_size);
return ret;
}
struct event *trace_find_event(int id)
@ -2525,6 +2557,41 @@ static inline int log10_cpu(int nb)
return 1;
}
static void print_lat_fmt(void *data, int size __unused)
{
unsigned int lat_flags;
unsigned int pc;
int lock_depth;
int hardirq;
int softirq;
lat_flags = parse_common_flags(data);
pc = parse_common_pc(data);
lock_depth = parse_common_lock_depth(data);
hardirq = lat_flags & TRACE_FLAG_HARDIRQ;
softirq = lat_flags & TRACE_FLAG_SOFTIRQ;
printf("%c%c%c",
(lat_flags & TRACE_FLAG_IRQS_OFF) ? 'd' :
(lat_flags & TRACE_FLAG_IRQS_NOSUPPORT) ?
'X' : '.',
(lat_flags & TRACE_FLAG_NEED_RESCHED) ?
'N' : '.',
(hardirq && softirq) ? 'H' :
hardirq ? 'h' : softirq ? 's' : '.');
if (pc)
printf("%x", pc);
else
printf(".");
if (lock_depth < 0)
printf(".");
else
printf("%d", lock_depth);
}
/* taken from Linux, written by Frederic Weisbecker */
static void print_graph_cpu(int cpu)
{
@ -2768,6 +2835,11 @@ pretty_print_func_ent(void *data, int size, struct event *event,
printf(" | ");
if (latency_format) {
print_lat_fmt(data, size);
printf(" | ");
}
field = find_field(event, "func");
if (!field)
die("function entry does not have func field");
@ -2811,6 +2883,11 @@ pretty_print_func_ret(void *data, int size __unused, struct event *event,
printf(" | ");
if (latency_format) {
print_lat_fmt(data, size);
printf(" | ");
}
field = find_field(event, "rettime");
if (!field)
die("can't find rettime in return graph");
@ -2882,9 +2959,14 @@ void print_event(int cpu, void *data, int size, unsigned long long nsecs,
return pretty_print_func_graph(data, size, event, cpu,
pid, comm, secs, usecs);
printf("%16s-%-5d [%03d] %5lu.%09Lu: %s: ",
comm, pid, cpu,
secs, nsecs, event->name);
if (latency_format) {
printf("%8.8s-%-5d %3d",
comm, pid, cpu);
print_lat_fmt(data, size);
} else
printf("%16s-%-5d [%03d]", comm, pid, cpu);
printf(" %5lu.%06lu: %s: ", secs, usecs, event->name);
if (event->flags & EVENT_FL_FAILED) {
printf("EVENT '%s' FAILED TO PARSE\n",

11
tools/perf/util/trace-event.h
View File

@ -239,6 +239,8 @@ extern int header_page_size_size;
extern int header_page_data_offset;
extern int header_page_data_size;
extern int latency_format;
int parse_header_page(char *buf, unsigned long size);
int trace_parse_common_type(void *data);
struct event *trace_find_event(int id);
@ -248,4 +250,13 @@ void *raw_field_ptr(struct event *event, const char *name, void *data);
void read_tracing_data(int fd, struct perf_event_attr *pattrs, int nb_events);
/* taken from kernel/trace/trace.h */
enum trace_flag_type {
TRACE_FLAG_IRQS_OFF = 0x01,
TRACE_FLAG_IRQS_NOSUPPORT = 0x02,
TRACE_FLAG_NEED_RESCHED = 0x04,
TRACE_FLAG_HARDIRQ = 0x08,
TRACE_FLAG_SOFTIRQ = 0x10,
};
#endif /* __PERF_TRACE_EVENTS_H */