diff options
Diffstat (limited to 'tests/tcg/plugins/bb.c')
| -rw-r--r-- | tests/tcg/plugins/bb.c | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/tests/tcg/plugins/bb.c b/tests/tcg/plugins/bb.c new file mode 100644 index 0000000..36776de --- /dev/null +++ b/tests/tcg/plugins/bb.c @@ -0,0 +1,133 @@ +/* + * 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; +} |