When -icount shift=n is in use, print the instruction count when finished. In conjunction with the `time` command, this can be used to calculate how many instructions per second QEMU TCG can translate and execute. The output can also be used to double-check future facilities such as exposing the instruction count to guest/target software through interfaces such as an emulated Performance Monitors Unit.
Signed-off-by: Christopher Covington <c...@codeaurora.org> --- cpus.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/cpus.c b/cpus.c index a822ce3..b0bc8ec 100644 --- a/cpus.c +++ b/cpus.c @@ -511,6 +511,13 @@ void cpu_ticks_init(void) vmstate_register(NULL, 0, &vmstate_timers, &timers_state); } +static Notifier icount_exit_notifier; + +static void print_instruction_count(Notifier *notifier, void *data) +{ + printf("Executed %"PRId64" target instructions.\n", cpu_get_icount_raw()); +} + void configure_icount(QemuOpts *opts, Error **errp) { const char *option; @@ -541,6 +548,8 @@ void configure_icount(QemuOpts *opts, Error **errp) if (errno != 0 || *rem_str != '\0' || !strlen(option)) { error_setg(errp, "icount: Invalid shift value"); } + icount_exit_notifier.notify = &print_instruction_count; + qemu_add_exit_notifier(&icount_exit_notifier); use_icount = 1; return; } else if (icount_align_option) { -- Qualcomm Innovation Center, Inc. The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project