@@ -252,6 +252,10 @@ void cpu_exec_step_atomic(CPUState *cpu)
start_exclusive();
+ if (tb_stats_enabled(tb, TB_EXEC_STATS)) {
+ tb->tb_stats->executions.atomic++;
+ }
+
/* Since we got here, we know that parallel_cpus must be true. */
parallel_cpus = false;
in_exclusive_region = true;
@@ -37,3 +37,8 @@ bool tb_stats_collection_paused(void)
{
return tcg_collect_tb_stats == TB_STATS_PAUSED;
}
+
+uint32_t get_default_tbstats_flag(void)
+{
+ return default_tbstats_flag;
+}
@@ -167,3 +167,10 @@ void HELPER(exit_atomic)(CPUArchState *env)
{
cpu_loop_exit_atomic(env_cpu(env), GETPC());
}
+
+void HELPER(inc_exec_freq)(void *ptr)
+{
+ TBStatistics *stats = (TBStatistics *) ptr;
+ g_assert(stats);
+ atomic_inc(&stats->executions.normal);
+}
@@ -28,6 +28,8 @@ DEF_HELPER_FLAGS_1(lookup_tb_ptr, TCG_CALL_NO_WG_SE, ptr, env)
DEF_HELPER_FLAGS_1(exit_atomic, TCG_CALL_NO_WG, noreturn, env)
+DEF_HELPER_FLAGS_1(inc_exec_freq, TCG_CALL_NO_RWG, void, ptr)
+
#ifdef CONFIG_SOFTMMU
DEF_HELPER_FLAGS_5(atomic_cmpxchgb, TCG_CALL_NO_WG,
@@ -1785,6 +1785,13 @@ TranslationBlock *tb_gen_code(CPUState *cpu,
*/
if (tb_stats_collection_enabled()) {
tb->tb_stats = tb_get_stats(phys_pc, pc, cs_base, flags, tb);
+
+ if (qemu_log_in_addr_range(tb->pc)) {
+ uint32_t flag = get_default_tbstats_flag();
+ if (flag & TB_EXEC_STATS) {
+ tb->tb_stats->stats_enabled |= TB_EXEC_STATS;
+ }
+ }
} else {
tb->tb_stats = NULL;
}
@@ -46,6 +46,7 @@ void translator_loop(const TranslatorOps *ops, DisasContextBase *db,
ops->init_disas_context(db, cpu);
tcg_debug_assert(db->is_jmp == DISAS_NEXT); /* no early exit */
+ gen_tb_exec_count(tb);
/* Reset the temp count so that we can identify leaks */
tcg_clear_temp_count();
@@ -7,6 +7,15 @@
static TCGOp *icount_start_insn;
+static inline void gen_tb_exec_count(TranslationBlock *tb)
+{
+ if (tb_stats_enabled(tb, TB_EXEC_STATS)) {
+ TCGv_ptr ptr = tcg_const_ptr(tb->tb_stats);
+ gen_helper_inc_exec_freq(ptr);
+ tcg_temp_free_ptr(ptr);
+ }
+}
+
static inline void gen_tb_start(TranslationBlock *tb)
{
TCGv_i32 count, imm;
@@ -6,6 +6,9 @@
#include "exec/tb-context.h"
#include "tcg.h"
+#define tb_stats_enabled(tb, JIT_STATS) \
+ (tb && tb->tb_stats && (tb->tb_stats->stats_enabled & JIT_STATS))
+
typedef struct TBStatistics TBStatistics;
/*
@@ -22,6 +25,15 @@ struct TBStatistics {
uint32_t flags;
/* cs_base isn't included in the hash but we do check for matches */
target_ulong cs_base;
+
+ uint32_t stats_enabled;
+
+ /* Execution stats */
+ struct {
+ unsigned long normal;
+ unsigned long atomic;
+ } executions;
+
/* current TB linked to this TBStatistics */
TranslationBlock *tb;
};
@@ -32,7 +44,12 @@ void init_tb_stats_htable_if_not(void);
/* TBStatistic collection controls */
enum TBStatsStatus { TB_STATS_RUNNING, TB_STATS_PAUSED, TB_STATS_STOPPED };
+
+#define TB_NOTHING (1 << 0)
+#define TB_EXEC_STATS (1 << 1)
+
extern int tcg_collect_tb_stats;
+extern uint32_t default_tbstats_flag;
void enable_collect_tb_stats(void);
void disable_collect_tb_stats(void);
@@ -40,4 +57,6 @@ void pause_collect_tb_stats(void);
bool tb_stats_collection_enabled(void);
bool tb_stats_collection_paused(void);
+uint32_t get_default_tbstats_flag(void);
+
#endif
@@ -32,6 +32,7 @@ static int log_append = 0;
static GArray *debug_regions;
int tcg_collect_tb_stats;
+uint32_t default_tbstats_flag;
/* Return the number of characters emitted. */
int qemu_log(const char *fmt, ...)
If a TB has a TBS (TBStatistics) with the TB_EXEC_STATS enabled, then we instrument the start code of this TB to atomically count the number of times it is executed. We count both the number of "normal" executions and atomic executions of a TB. The execution count of the TB is stored in its respective TBS. All TBStatistics are created by default with the flags from default_tbstats_flag. Signed-off-by: Vanderson M. do Rosario <vandersonmr2@gmail.com> --- accel/tcg/cpu-exec.c | 4 ++++ accel/tcg/tb-stats.c | 5 +++++ accel/tcg/tcg-runtime.c | 7 +++++++ accel/tcg/tcg-runtime.h | 2 ++ accel/tcg/translate-all.c | 7 +++++++ accel/tcg/translator.c | 1 + include/exec/gen-icount.h | 9 +++++++++ include/exec/tb-stats.h | 19 +++++++++++++++++++ util/log.c | 1 + 9 files changed, 55 insertions(+)