[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-devel] [PATCH v2 3/4] Introduce dump of hot TBs
From: |
vandersonmr |
Subject: |
[Qemu-devel] [PATCH v2 3/4] Introduce dump of hot TBs |
Date: |
Mon, 24 Jun 2019 02:54:41 -0300 |
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 <address@hidden>
---
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