Adding a function to dump the Nth hottest TBs. The block PC, execution count and ops is dump to the log.
Signed-off-by: Vanderson M. do Rosario <vanderson...@gmail.com> --- accel/tcg/translate-all.c | 45 +++++++++++++++++++++++++++++++++++++++ include/exec/exec-all.h | 2 ++ 2 files changed, 47 insertions(+) diff --git a/accel/tcg/translate-all.c b/accel/tcg/translate-all.c index f7e99f90e0..c3d9ecb2c4 100644 --- a/accel/tcg/translate-all.c +++ b/accel/tcg/translate-all.c @@ -1240,6 +1240,27 @@ static gboolean tb_host_size_iter(gpointer key, gpointer value, gpointer data) return false; } +static void tb_dump_statistics(TBStatistics *tbs) +{ + uint32_t cflags = curr_cflags() | CF_NOCACHE; + int old_log_flags = qemu_loglevel; + + qemu_set_log(CPU_LOG_TB_OP_OPT); + + qemu_log("\n------------------------------\n"); + qemu_log("Translation Block PC: \t0x"TARGET_FMT_lx "\n", tbs->pc); + qemu_log("Execution Count: \t%lu\n\n", (uint64_t) (tbs->exec_count + tbs->exec_count_overflows*0xFFFFFFFF)); + + mmap_lock(); + TranslationBlock *tb = tb_gen_code(current_cpu, tbs->pc, tbs->cs_base, tbs->flags, cflags); + tb_phys_invalidate(tb, -1); + mmap_unlock(); + + qemu_set_log(old_log_flags); + + tcg_tb_remove(tb); +} + /* flush all the translation blocks */ static void do_tb_flush(CPUState *cpu, run_on_cpu_data tb_flush_count) { @@ -1276,6 +1297,30 @@ done: mmap_unlock(); } +static gint inverse_sort_tbs(gconstpointer p1, gconstpointer p2) +{ + const TBStatistics *tbs1 = (TBStatistics *) p1; + const TBStatistics *tbs2 = (TBStatistics *) p2; + uint64_t p1_count = (uint64_t) (tbs1->exec_count + tbs1->exec_count_overflows*0xFFFFFFFF); + uint64_t p2_count = (uint64_t) (tbs2->exec_count + tbs2->exec_count_overflows*0xFFFFFFFF); + + return p1_count < p2_count ? 1 : p1_count == p2_count ? 0 : -1; +} + +void tb_dump_exec_freq(uint32_t max_tbs_to_print) +{ + tb_ctx.tb_statistics = g_list_sort(tb_ctx.tb_statistics, inverse_sort_tbs); + + uint32_t tbs_printed = 0; + for (GList *i = tb_ctx.tb_statistics; i != NULL; i = i->next) { + tbs_printed++; + tb_dump_statistics((TBStatistics *) i->data); + if (max_tbs_to_print != 0 && tbs_printed >= max_tbs_to_print) { + break; + } + } +} + void tb_flush(CPUState *cpu) { if (tcg_enabled()) { diff --git a/include/exec/exec-all.h b/include/exec/exec-all.h index 359100ef3b..0547db0271 100644 --- a/include/exec/exec-all.h +++ b/include/exec/exec-all.h @@ -533,4 +533,6 @@ hwaddr memory_region_section_get_iotlb(CPUState *cpu, /* vl.c */ extern int singlestep; +void tb_dump_exec_freq(uint32_t); + #endif -- 2.22.0