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tests/plugin: allow libinsn.so per-CPU counts

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We won't go fully flexible but for most system emulation 8 vCPUs
resolution should be enough for anybody ;-)

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20220204204335.1689602-24-alex.bennee@linaro.org>
This commit is contained in:
Alex Bennée 2022-02-04 20:43:32 +00:00
parent 227b45dc42
commit 39be9dd30f
1 changed files with 31 additions and 8 deletions
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39
tests/plugin/insn.c
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@ -16,22 +16,33 @@
QEMU_PLUGIN_EXPORT int qemu_plugin_version = QEMU_PLUGIN_VERSION;
static uint64_t insn_count;
#define MAX_CPUS 8 /* lets not go nuts */
typedef struct {
uint64_t last_pc;
uint64_t insn_count;
} InstructionCount;
static InstructionCount counts[MAX_CPUS];
static uint64_t inline_insn_count;
static bool do_inline;
static bool do_size;
static bool do_frequency;
static GArray *sizes;
static void vcpu_insn_exec_before(unsigned int cpu_index, void *udata)
{
static uint64_t last_pc;
unsigned int i = cpu_index % MAX_CPUS;
InstructionCount *c = &counts[i];
uint64_t this_pc = GPOINTER_TO_UINT(udata);
if (this_pc == last_pc) {
if (this_pc == c->last_pc) {
g_autofree gchar *out = g_strdup_printf("detected repeat execution @ 0x%"
PRIx64 "\n", this_pc);
qemu_plugin_outs(out);
}
last_pc = this_pc;
insn_count++;
c->last_pc = this_pc;
c->insn_count++;
}
static void vcpu_tb_trans(qemu_plugin_id_t id, struct qemu_plugin_tb *tb)
@ -44,7 +55,7 @@ static void vcpu_tb_trans(qemu_plugin_id_t id, struct qemu_plugin_tb *tb)
if (do_inline) {
qemu_plugin_register_vcpu_insn_exec_inline(
insn, QEMU_PLUGIN_INLINE_ADD_U64, &insn_count, 1);
insn, QEMU_PLUGIN_INLINE_ADD_U64, &inline_insn_count, 1);
} else {
uint64_t vaddr = qemu_plugin_insn_vaddr(insn);
qemu_plugin_register_vcpu_insn_exec_cb(
@ -66,9 +77,9 @@ static void vcpu_tb_trans(qemu_plugin_id_t id, struct qemu_plugin_tb *tb)
static void plugin_exit(qemu_plugin_id_t id, void *p)
{
g_autoptr(GString) out = g_string_new(NULL);
int i;
if (do_size) {
int i;
for (i = 0; i <= sizes->len; i++) {
unsigned long *cnt = &g_array_index(sizes, unsigned long, i);
if (*cnt) {
@ -76,8 +87,20 @@ static void plugin_exit(qemu_plugin_id_t id, void *p)
"len %d bytes: %ld insns\n", i, *cnt);
}
}
} else if (do_inline) {
g_string_append_printf(out, "insns: %" PRIu64 "\n", inline_insn_count);
} else {
g_string_append_printf(out, "insns: %" PRIu64 "\n", insn_count);
uint64_t total_insns = 0;
for (i = 0; i < MAX_CPUS; i++) {
InstructionCount *c = &counts[i];
if (c->insn_count) {
g_string_append_printf(out, "cpu %d insns: %" PRIu64 "\n",
i, c->insn_count);
total_insns += c->insn_count;
}
}
g_string_append_printf(out, "total insns: %" PRIu64 "\n",
total_insns);
}
qemu_plugin_outs(out->str);
}