/* Copyright (c) 2013-2015 PLUMgrid, http://plumgrid.com
 * Copyright (c) 2015 BMW Car IT GmbH
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of version 2 of the GNU General Public
 * License as published by the Free Software Foundation.
 */
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <signal.h>
#include <linux/bpf.h>
#include "libbpf.h"
#include "bpf_load.h"

#define MAX_ENTRIES	20
#define MAX_CPU		4
#define MAX_STARS	40

struct cpu_hist {
	long data[MAX_ENTRIES];
	long max;
};

static struct cpu_hist cpu_hist[MAX_CPU];

static void stars(char *str, long val, long max, int width)
{
	int i;

	for (i = 0; i < (width * val / max) - 1 && i < width - 1; i++)
		str[i] = '*';
	if (val > max)
		str[i - 1] = '+';
	str[i] = '\0';
}

static void print_hist(void)
{
	char starstr[MAX_STARS];
	struct cpu_hist *hist;
	int i, j;

	/* clear screen */
	printf("\033[2J");

	for (j = 0; j < MAX_CPU; j++) {
		hist = &cpu_hist[j];

		/* ignore CPUs without data (maybe offline?) */
		if (hist->max == 0)
			continue;

		printf("CPU %d\n", j);
		printf("      latency        : count     distribution\n");
		for (i = 1; i <= MAX_ENTRIES; i++) {
			stars(starstr, hist->data[i - 1], hist->max, MAX_STARS);
			printf("%8ld -> %-8ld : %-8ld |%-*s|\n",
				(1l << i) >> 1, (1l << i) - 1,
				hist->data[i - 1], MAX_STARS, starstr);
		}
	}
}

static void get_data(int fd)
{
	long key, value;
	int c, i;

	for (i = 0; i < MAX_CPU; i++)
		cpu_hist[i].max = 0;

	for (c = 0; c < MAX_CPU; c++) {
		for (i = 0; i < MAX_ENTRIES; i++) {
			key = c * MAX_ENTRIES + i;
			bpf_map_lookup_elem(fd, &key, &value);

			cpu_hist[c].data[i] = value;
			if (value > cpu_hist[c].max)
				cpu_hist[c].max = value;
		}
	}
}

int main(int argc, char **argv)
{
	char filename[256];

	snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);

	if (load_bpf_file(filename)) {
		printf("%s", bpf_log_buf);
		return 1;
	}

	while (1) {
		get_data(map_fd[1]);
		print_hist();
		sleep(5);
	}

	return 0;
}
/cgit.cgi/linux/net-next.git/diff/include/soc/fsl/qe/qe_tdm.h?id=65390ea01ce678379da32b01f39fcfac4903f256'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/include/soc/fsl/qe/qe_tdm.h'>
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?id=65390ea01ce678379da32b01f39fcfac4903f256'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include?id=65390ea01ce678379da32b01f39fcfac4903f256'>include</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/soc?id=65390ea01ce678379da32b01f39fcfac4903f256'>soc</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/soc/fsl?id=65390ea01ce678379da32b01f39fcfac4903f256'>fsl</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/soc/fsl/qe?id=65390ea01ce678379da32b01f39fcfac4903f256'>qe</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/soc/fsl/qe/qe_tdm.h?id=65390ea01ce678379da32b01f39fcfac4903f256'>qe_tdm.h</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='65390ea01ce678379da32b01f39fcfac4903f256'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Mauro Carvalho Chehab &lt;mchehab@s-opensource.com&gt;</td><td class='right'>2016-12-15 08:38:35 -0200</td></tr>
<tr><th>committer</th><td>Mauro Carvalho Chehab &lt;mchehab@s-opensource.com&gt;</td><td class='right'>2016-12-15 08:38:35 -0200</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/soc/fsl/qe/qe_tdm.h?id=65390ea01ce678379da32b01f39fcfac4903f256'>65390ea01ce678379da32b01f39fcfac4903f256</a> (<a href='/cgit.cgi/linux/net-next.git/patch/include/soc/fsl/qe/qe_tdm.h?id=65390ea01ce678379da32b01f39fcfac4903f256'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=65390ea01ce678379da32b01f39fcfac4903f256'>7f849d66121533c331cf61136b124218d87cbf86</a> /<a href='/cgit.cgi/linux/net-next.git/tree/include/soc/fsl/qe/qe_tdm.h?id=65390ea01ce678379da32b01f39fcfac4903f256'>include/soc/fsl/qe/qe_tdm.h</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/soc/fsl/qe/qe_tdm.h?id=e7aa8c2eb11ba69b1b69099c3c7bd6be3087b0ba'>e7aa8c2eb11ba69b1b69099c3c7bd6be3087b0ba</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include/soc/fsl/qe/qe_tdm.h?id=65390ea01ce678379da32b01f39fcfac4903f256&amp;id2=e7aa8c2eb11ba69b1b69099c3c7bd6be3087b0ba'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/soc/fsl/qe/qe_tdm.h?id=d183e4efcae8d88a2f252e546978658ca6d273cc'>d183e4efcae8d88a2f252e546978658ca6d273cc</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include/soc/fsl/qe/qe_tdm.h?id=65390ea01ce678379da32b01f39fcfac4903f256&amp;id2=d183e4efcae8d88a2f252e546978658ca6d273cc'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge branch 'patchwork' into v4l_for_linus</div><div class='commit-msg'>* patchwork: (496 commits)
  [media] v4l: tvp5150: Add missing break in set control handler
  [media] v4l: tvp5150: Don't inline the tvp5150_selmux() function
  [media] v4l: tvp5150: Compile tvp5150_link_setup out if !CONFIG_MEDIA_CONTROLLER
  [media] em28xx: don't store usb_device at struct em28xx
  [media] em28xx: use usb_interface for dev_foo() calls
  [media] em28xx: don't change the device's name
  [media] mn88472: fix chip id check on probe
  [media] mn88473: fix chip id check on probe
  [media] lirc: fix error paths in lirc_cdev_add()
  [media] s5p-mfc: Add support for MFC v8 available in Exynos 5433 SoCs
  [media] s5p-mfc: Rework clock handling
  [media] s5p-mfc: Don't keep clock prepared all the time
  [media] s5p-mfc: Kill all IS_ERR_OR_NULL in clocks management code
  [media] s5p-mfc: Remove dead conditional code
  [media] s5p-mfc: Ensure that clock is disabled before turning power off
  [media] s5p-mfc: Remove special clock rate management
  [media] s5p-mfc: Use printk_ratelimited for reporting ioctl errors
  [media] s5p-mfc: Set DMA_ATTR_ALLOC_SINGLE_PAGES
  [media] vivid: Set color_enc on HSV formats
  [media] v4l2-tpg: Init hv_enc field with a valid value
  ...
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=65390ea01ce678379da32b01f39fcfac4903f256'>Diffstat</a> (limited to 'include/soc/fsl/qe/qe_tdm.h')</div><table summary='diffstat' class='diffstat'>