| 1 | /* |
| 2 | * Copyright (C) 2018, Emilio G. Cota <cota@braap.org> |
| 3 | * |
| 4 | * License: GNU GPL, version 2 or later. |
| 5 | * See the COPYING file in the top-level directory. |
| 6 | */ |
| 7 | #include <inttypes.h> |
| 8 | #include <assert.h> |
| 9 | #include <stdlib.h> |
| 10 | #include <string.h> |
| 11 | #include <unistd.h> |
| 12 | #include <stdio.h> |
| 13 | #include <glib.h> |
| 14 | |
| 15 | #include <qemu-plugin.h> |
| 16 | |
| 17 | QEMU_PLUGIN_EXPORT int qemu_plugin_version = QEMU_PLUGIN_VERSION; |
| 18 | |
| 19 | typedef struct { |
| 20 | uint64_t bb_count; |
| 21 | uint64_t insn_count; |
| 22 | } CPUCount; |
| 23 | |
| 24 | static struct qemu_plugin_scoreboard *counts; |
| 25 | static qemu_plugin_u64 bb_count; |
| 26 | static qemu_plugin_u64 insn_count; |
| 27 | |
| 28 | static bool do_inline; |
| 29 | /* Dump running CPU total on idle? */ |
| 30 | static bool idle_report; |
| 31 | |
| 32 | static void gen_one_cpu_report(CPUCount *count, GString *report, |
| 33 | unsigned int cpu_index) |
| 34 | { |
| 35 | if (count->bb_count) { |
| 36 | g_string_append_printf(report, "CPU%d: " |
| 37 | "bb's: %" PRIu64", insns: %" PRIu64 "\n", |
| 38 | cpu_index, |
| 39 | count->bb_count, count->insn_count); |
| 40 | } |
| 41 | } |
| 42 | |
| 43 | static void plugin_exit(void *p) |
| 44 | { |
| 45 | g_autoptr(GString) report = g_string_new(""); |
| 46 | |
| 47 | for (int i = 0; i < qemu_plugin_num_vcpus(); ++i) { |
| 48 | CPUCount *count = qemu_plugin_scoreboard_find(counts, i); |
| 49 | gen_one_cpu_report(count, report, i); |
| 50 | } |
| 51 | g_string_append_printf(report, "Total: " |
| 52 | "bb's: %" PRIu64", insns: %" PRIu64 "\n", |
| 53 | qemu_plugin_u64_sum(bb_count), |
| 54 | qemu_plugin_u64_sum(insn_count)); |
| 55 | qemu_plugin_outs(report->str); |
| 56 | qemu_plugin_scoreboard_free(counts); |
| 57 | } |
| 58 | |
| 59 | static void vcpu_idle(unsigned int cpu_index, void *userdata) |
| 60 | { |
| 61 | CPUCount *count = qemu_plugin_scoreboard_find(counts, cpu_index); |
| 62 | g_autoptr(GString) report = g_string_new(""); |
| 63 | gen_one_cpu_report(count, report, cpu_index); |
| 64 | |
| 65 | if (report->len > 0) { |
| 66 | g_string_prepend(report, "Idling "); |
| 67 | qemu_plugin_outs(report->str); |
| 68 | } |
| 69 | } |
| 70 | |
| 71 | static void vcpu_tb_exec(unsigned int cpu_index, void *udata) |
| 72 | { |
| 73 | CPUCount *count = qemu_plugin_scoreboard_find(counts, cpu_index); |
| 74 | |
| 75 | uintptr_t n_insns = (uintptr_t)udata; |
| 76 | count->insn_count += n_insns; |
| 77 | count->bb_count++; |
| 78 | } |
| 79 | |
| 80 | static void vcpu_tb_trans(struct qemu_plugin_tb *tb, void *userdata) |
| 81 | { |
| 82 | size_t n_insns = qemu_plugin_tb_n_insns(tb); |
| 83 | |
| 84 | if (do_inline) { |
| 85 | qemu_plugin_register_vcpu_tb_exec_inline_per_vcpu( |
| 86 | tb, QEMU_PLUGIN_INLINE_ADD_U64, bb_count, 1); |
| 87 | qemu_plugin_register_vcpu_tb_exec_inline_per_vcpu( |
| 88 | tb, QEMU_PLUGIN_INLINE_ADD_U64, insn_count, n_insns); |
| 89 | } else { |
| 90 | qemu_plugin_register_vcpu_tb_exec_cb(tb, vcpu_tb_exec, |
| 91 | QEMU_PLUGIN_CB_NO_REGS, |
| 92 | (void *)n_insns); |
| 93 | } |
| 94 | } |
| 95 | |
| 96 | QEMU_PLUGIN_EXPORT int qemu_plugin_install(qemu_plugin_id_t id, |
| 97 | const qemu_info_t *info, |
| 98 | int argc, char **argv) |
| 99 | { |
| 100 | int i; |
| 101 | |
| 102 | for (i = 0; i < argc; i++) { |
| 103 | char *opt = argv[i]; |
| 104 | g_auto(GStrv) tokens = g_strsplit(opt, "=", 2); |
| 105 | if (g_strcmp0(tokens[0], "inline") == 0) { |
| 106 | if (!qemu_plugin_bool_parse(tokens[0], tokens[1], &do_inline)) { |
| 107 | fprintf(stderr, "boolean argument parsing failed: %s\n", opt); |
| 108 | return -1; |
| 109 | } |
| 110 | } else if (g_strcmp0(tokens[0], "idle") == 0) { |
| 111 | if (!qemu_plugin_bool_parse(tokens[0], tokens[1], &idle_report)) { |
| 112 | fprintf(stderr, "boolean argument parsing failed: %s\n", opt); |
| 113 | return -1; |
| 114 | } |
| 115 | } else { |
| 116 | fprintf(stderr, "option parsing failed: %s\n", opt); |
| 117 | return -1; |
| 118 | } |
| 119 | } |
| 120 | |
| 121 | counts = qemu_plugin_scoreboard_new(sizeof(CPUCount)); |
| 122 | bb_count = qemu_plugin_scoreboard_u64_in_struct(counts, CPUCount, bb_count); |
| 123 | insn_count = qemu_plugin_scoreboard_u64_in_struct( |
| 124 | counts, CPUCount, insn_count); |
| 125 | |
| 126 | if (idle_report) { |
| 127 | qemu_plugin_register_vcpu_idle_cb(id, vcpu_idle, NULL); |
| 128 | } |
| 129 | |
| 130 | qemu_plugin_register_vcpu_tb_trans_cb(id, vcpu_tb_trans, NULL); |
| 131 | qemu_plugin_register_atexit_cb(id, plugin_exit, NULL); |
| 132 | return 0; |
| 133 | } |