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/*
* Copyright (C) 2018, Emilio G. Cota <cota@braap.org>
*
* License: GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#include <inttypes.h>
#include <assert.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <stdio.h>
#include <glib.h>
#include <qemu-plugin.h>
QEMU_PLUGIN_EXPORT int qemu_plugin_version = QEMU_PLUGIN_VERSION;
typedef struct {
uint64_t bb_count;
uint64_t insn_count;
} CPUCount;
static struct qemu_plugin_scoreboard *counts;
static qemu_plugin_u64 bb_count;
static qemu_plugin_u64 insn_count;
static bool do_inline;
/* Dump running CPU total on idle? */
static bool idle_report;
static void gen_one_cpu_report(CPUCount *count, GString *report,
unsigned int cpu_index)
{
if (count->bb_count) {
g_string_append_printf(report, "CPU%d: "
"bb's: %" PRIu64", insns: %" PRIu64 "\n",
cpu_index,
count->bb_count, count->insn_count);
}
}
static void plugin_exit(qemu_plugin_id_t id, void *p)
{
g_autoptr(GString) report = g_string_new("");
for (int i = 0; i < qemu_plugin_num_vcpus(); ++i) {
CPUCount *count = qemu_plugin_scoreboard_find(counts, i);
gen_one_cpu_report(count, report, i);
}
g_string_append_printf(report, "Total: "
"bb's: %" PRIu64", insns: %" PRIu64 "\n",
qemu_plugin_u64_sum(bb_count),
qemu_plugin_u64_sum(insn_count));
qemu_plugin_outs(report->str);
qemu_plugin_scoreboard_free(counts);
}
static void vcpu_idle(qemu_plugin_id_t id, unsigned int cpu_index)
{
CPUCount *count = qemu_plugin_scoreboard_find(counts, cpu_index);
g_autoptr(GString) report = g_string_new("");
gen_one_cpu_report(count, report, cpu_index);
if (report->len > 0) {
g_string_prepend(report, "Idling ");
qemu_plugin_outs(report->str);
}
}
static void vcpu_tb_exec(unsigned int cpu_index, void *udata)
{
CPUCount *count = qemu_plugin_scoreboard_find(counts, cpu_index);
uintptr_t n_insns = (uintptr_t)udata;
count->insn_count += n_insns;
count->bb_count++;
}
static void vcpu_tb_trans(qemu_plugin_id_t id, struct qemu_plugin_tb *tb)
{
size_t n_insns = qemu_plugin_tb_n_insns(tb);
if (do_inline) {
qemu_plugin_register_vcpu_tb_exec_inline_per_vcpu(
tb, QEMU_PLUGIN_INLINE_ADD_U64, bb_count, 1);
qemu_plugin_register_vcpu_tb_exec_inline_per_vcpu(
tb, QEMU_PLUGIN_INLINE_ADD_U64, insn_count, n_insns);
} else {
qemu_plugin_register_vcpu_tb_exec_cb(tb, vcpu_tb_exec,
QEMU_PLUGIN_CB_NO_REGS,
(void *)n_insns);
}
}
QEMU_PLUGIN_EXPORT int qemu_plugin_install(qemu_plugin_id_t id,
const qemu_info_t *info,
int argc, char **argv)
{
int i;
for (i = 0; i < argc; i++) {
char *opt = argv[i];
g_auto(GStrv) tokens = g_strsplit(opt, "=", 2);
if (g_strcmp0(tokens[0], "inline") == 0) {
if (!qemu_plugin_bool_parse(tokens[0], tokens[1], &do_inline)) {
fprintf(stderr, "boolean argument parsing failed: %s\n", opt);
return -1;
}
} else if (g_strcmp0(tokens[0], "idle") == 0) {
if (!qemu_plugin_bool_parse(tokens[0], tokens[1], &idle_report)) {
fprintf(stderr, "boolean argument parsing failed: %s\n", opt);
return -1;
}
} else {
fprintf(stderr, "option parsing failed: %s\n", opt);
return -1;
}
}
counts = qemu_plugin_scoreboard_new(sizeof(CPUCount));
bb_count = qemu_plugin_scoreboard_u64_in_struct(counts, CPUCount, bb_count);
insn_count = qemu_plugin_scoreboard_u64_in_struct(
counts, CPUCount, insn_count);
if (idle_report) {
qemu_plugin_register_vcpu_idle_cb(id, vcpu_idle);
}
qemu_plugin_register_vcpu_tb_trans_cb(id, vcpu_tb_trans);
qemu_plugin_register_atexit_cb(id, plugin_exit, NULL);
return 0;
}
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