C++ (Cpp) bts_config_bufferの例

コード例 #1

ファイル: perf_event_intel_bts.c プロジェクト: 0x000000FF/edison-linux

static void __bts_event_start(struct perf_event *event)
{
	struct bts_ctx *bts = this_cpu_ptr(&bts_ctx);
	struct bts_buffer *buf = perf_get_aux(&bts->handle);
	u64 config = 0;

	if (!buf || bts_buffer_is_full(buf, bts))
		return;

	event->hw.state = 0;

	if (!buf->snapshot)
		config |= ARCH_PERFMON_EVENTSEL_INT;
	if (!event->attr.exclude_kernel)
		config |= ARCH_PERFMON_EVENTSEL_OS;
	if (!event->attr.exclude_user)
		config |= ARCH_PERFMON_EVENTSEL_USR;

	bts_config_buffer(buf);

	/*
	 * local barrier to make sure that ds configuration made it
	 * before we enable BTS
	 */
	wmb();

	intel_pmu_enable_bts(config);
}

コード例 #2

ファイル: bts.c プロジェクト: bobcao3/linux

static void __bts_event_start(struct perf_event *event)
{
	struct bts_ctx *bts = this_cpu_ptr(&bts_ctx);
	struct bts_buffer *buf = perf_get_aux(&bts->handle);
	u64 config = 0;

	if (!buf->snapshot)
		config |= ARCH_PERFMON_EVENTSEL_INT;
	if (!event->attr.exclude_kernel)
		config |= ARCH_PERFMON_EVENTSEL_OS;
	if (!event->attr.exclude_user)
		config |= ARCH_PERFMON_EVENTSEL_USR;

	bts_config_buffer(buf);

	/*
	 * local barrier to make sure that ds configuration made it
	 * before we enable BTS and bts::state goes ACTIVE
	 */
	wmb();

	/* INACTIVE/STOPPED -> ACTIVE */
	WRITE_ONCE(bts->state, BTS_STATE_ACTIVE);

	intel_pmu_enable_bts(config);

}