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perf intel-pt: Make logging slightly more efficient

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Logging is only used for debugging. Use macros to save calling into the
functions only to return immediately when logging is not enabled.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/1443186956-18718-5-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Adrian Hunter 2015-09-25 16:15:35 +03:00 committed by Arnaldo Carvalho de Melo
parent 9992c2d50a
commit 116f349c5b
2 changed files with 43 additions and 16 deletions
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21
tools/perf/util/intel-pt-decoder/intel-pt-log.c
View File

@ -29,18 +29,18 @@
static FILE *f;
static char log_name[MAX_LOG_NAME];
static bool enable_logging;
bool intel_pt_enable_logging;
void intel_pt_log_enable(void)
{
enable_logging = true;
intel_pt_enable_logging = true;
}
void intel_pt_log_disable(void)
{
if (f)
fflush(f);
enable_logging = false;
intel_pt_enable_logging = false;
}
void intel_pt_log_set_name(const char *name)
@ -80,7 +80,7 @@ static void intel_pt_print_no_data(uint64_t pos, int indent)
static int intel_pt_log_open(void)
{
if (!enable_logging)
if (!intel_pt_enable_logging)
return -1;
if (f)
@ -91,15 +91,15 @@ static int intel_pt_log_open(void)
f = fopen(log_name, "w+");
if (!f) {
enable_logging = false;
intel_pt_enable_logging = false;
return -1;
}
return 0;
}
void intel_pt_log_packet(const struct intel_pt_pkt *packet, int pkt_len,
uint64_t pos, const unsigned char *buf)
void __intel_pt_log_packet(const struct intel_pt_pkt *packet, int pkt_len,
uint64_t pos, const unsigned char *buf)
{
char desc[INTEL_PT_PKT_DESC_MAX];
@ -111,7 +111,7 @@ void intel_pt_log_packet(const struct intel_pt_pkt *packet, int pkt_len,
fprintf(f, "%s\n", desc);
}
void intel_pt_log_insn(struct intel_pt_insn *intel_pt_insn, uint64_t ip)
void __intel_pt_log_insn(struct intel_pt_insn *intel_pt_insn, uint64_t ip)
{
char desc[INTEL_PT_INSN_DESC_MAX];
size_t len = intel_pt_insn->length;
@ -128,7 +128,8 @@ void intel_pt_log_insn(struct intel_pt_insn *intel_pt_insn, uint64_t ip)
fprintf(f, "Bad instruction!\n");
}
void intel_pt_log_insn_no_data(struct intel_pt_insn *intel_pt_insn, uint64_t ip)
void __intel_pt_log_insn_no_data(struct intel_pt_insn *intel_pt_insn,
uint64_t ip)
{
char desc[INTEL_PT_INSN_DESC_MAX];
@ -142,7 +143,7 @@ void intel_pt_log_insn_no_data(struct intel_pt_insn *intel_pt_insn, uint64_t ip)
fprintf(f, "Bad instruction!\n");
}
void intel_pt_log(const char *fmt, ...)
void __intel_pt_log(const char *fmt, ...)
{
va_list args;

38
tools/perf/util/intel-pt-decoder/intel-pt-log.h
View File

@ -25,20 +25,46 @@ void intel_pt_log_enable(void);
void intel_pt_log_disable(void);
void intel_pt_log_set_name(const char *name);
void intel_pt_log_packet(const struct intel_pt_pkt *packet, int pkt_len,
uint64_t pos, const unsigned char *buf);
void __intel_pt_log_packet(const struct intel_pt_pkt *packet, int pkt_len,
uint64_t pos, const unsigned char *buf);
struct intel_pt_insn;
void intel_pt_log_insn(struct intel_pt_insn *intel_pt_insn, uint64_t ip);
void intel_pt_log_insn_no_data(struct intel_pt_insn *intel_pt_insn,
uint64_t ip);
void __intel_pt_log_insn(struct intel_pt_insn *intel_pt_insn, uint64_t ip);
void __intel_pt_log_insn_no_data(struct intel_pt_insn *intel_pt_insn,
uint64_t ip);
__attribute__((format(printf, 1, 2)))
void intel_pt_log(const char *fmt, ...);
void __intel_pt_log(const char *fmt, ...);
#define intel_pt_log(fmt, ...) \
do { \
if (intel_pt_enable_logging) \
__intel_pt_log(fmt, ##__VA_ARGS__); \
} while (0)
#define intel_pt_log_packet(arg, ...) \
do { \
if (intel_pt_enable_logging) \
__intel_pt_log_packet(arg, ##__VA_ARGS__); \
} while (0)
#define intel_pt_log_insn(arg, ...) \
do { \
if (intel_pt_enable_logging) \
__intel_pt_log_insn(arg, ##__VA_ARGS__); \
} while (0)
#define intel_pt_log_insn_no_data(arg, ...) \
do { \
if (intel_pt_enable_logging) \
__intel_pt_log_insn_no_data(arg, ##__VA_ARGS__); \
} while (0)
#define x64_fmt "0x%" PRIx64
extern bool intel_pt_enable_logging;
static inline void intel_pt_log_at(const char *msg, uint64_t u)
{
intel_pt_log("%s at " x64_fmt "\n", msg, u);