power.c

/*
 * Copyright (c) 2012, 2019 Apple Computer, Inc.  All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 *
 * The contents of this file constitute Original Code as defined in and
 * are subject to the Apple Public Source License Version 1.1 (the
 * "License").  You may not use this file except in compliance with the
 * License.  Please obtain a copy of the License at
 * http://www.apple.com/publicsource and read it before using this file.
 *
 * This Original Code and all software distributed under the License are
 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
 * License for the specific language governing rights and limitations
 * under the License.
 *
 * @APPLE_LICENSE_HEADER_END@
 */

#include "generic.h"
#include "libtop.h"
#include "preferences.h"
#include "statistic.h"
#include "uinteger.h"
#include <mach/clock_types.h>
#include <stdlib.h>

extern const libtop_tsamp_t *tsamp;

static bool
idlewake_insert_cell(struct statistic *s, const void *sample)
{
	const libtop_psamp_t *psamp = sample;
	char buf[GENERIC_INT_SIZE];

	if (top_uinteger_format_result(buf, sizeof(buf), psamp->power.task_platform_idle_wakeups,
				psamp->p_power.task_platform_idle_wakeups,
				psamp->b_power.task_platform_idle_wakeups)) {
		return true;
	}

	return generic_insert_cell(s, buf);
}

// cribbed from cpu_insert_cell
static bool
powerscore_insert_cell(struct statistic *s, const void *sample)
{
	const libtop_psamp_t *psamp = sample;
	char buf[10];
	unsigned long long elapsed_us = 0, used_us = 0, idlew = 0, taxed_us = 0;
	int whole = 0, part = 0;

	if (0 == psamp->p_seq || 0 == psamp->pid) { // kernel gets a free ride
		whole = 0;
		part = 0;

		if (-1 == snprintf(buf, sizeof(buf), "%d.%1d", whole, part))
			return true;

		return generic_insert_cell(s, buf);
	}

	uint64_t last_timens = 0;
	uint64_t last_total_timens = 0;
	switch (top_prefs_get_mode()) {
	case STATMODE_ACCUM:
		last_timens = tsamp->b_timens;
		last_total_timens = psamp->b_total_timens;
		idlew = psamp->power.task_platform_idle_wakeups - psamp->b_power.task_platform_idle_wakeups;
		break;

	case STATMODE_EVENT:
	case STATMODE_DELTA:
	case STATMODE_NON_EVENT:
		last_timens = tsamp->p_timens;
		last_total_timens = psamp->p_total_timens;
		idlew = psamp->power.task_platform_idle_wakeups - psamp->p_power.task_platform_idle_wakeups;
		break;

	default:
		fprintf(stderr, "unhandled STATMODE in %s\n", __func__);
		abort();
	}

	elapsed_us = (tsamp->timens - last_timens) / NSEC_PER_USEC;
	taxed_us = (unsigned long long)idlew * 500ULL;
	used_us = (psamp->total_timens - last_total_timens) / NSEC_PER_USEC + taxed_us;

	/* Avoid a divide by 0 exception. */
	if (elapsed_us > 0) {
		whole = (used_us * 100ULL) / elapsed_us;
		part = (((used_us * 100ULL) - (whole * elapsed_us)) * 10ULL) / elapsed_us;
	}

	// top_log("command %s whole %d part %d\n", psamp->command, whole, part);

	if (-1 == snprintf(buf, sizeof(buf), "%d.%1d", whole, part))
		return true;

	return generic_insert_cell(s, buf);
}

static struct statistic_callbacks idlewake_callbacks = { .draw = generic_draw,
	.resize_cells = generic_resize_cells,
	.move_cells = generic_move_cells,
	.get_request_size = generic_get_request_size,
	.get_minimum_size = generic_get_minimum_size,
	.insert_cell = idlewake_insert_cell,
	.reset_insertion = generic_reset_insertion };

static struct statistic_callbacks powerscore_callbacks = { .draw = generic_draw,
	.resize_cells = generic_resize_cells,
	.move_cells = generic_move_cells,
	.get_request_size = generic_get_request_size,
	.get_minimum_size = generic_get_minimum_size,
	.insert_cell = powerscore_insert_cell,
	.reset_insertion = generic_reset_insertion };

struct statistic *
top_idlewake_create(WINDOW *parent, const char *name)
{
	return create_statistic(STATISTIC_PORTS, parent, NULL, &idlewake_callbacks, name);
}

struct statistic *
top_powerscore_create(WINDOW *parent, const char *name)
{
	return create_statistic(STATISTIC_PORTS, parent, NULL, &powerscore_callbacks, name);
}