/*
 * benchmark.c:
 * Author: Konstantin Khlebnikov <koct9i@gmail.com>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 */
#include <linux/radix-tree.h>
#include <linux/slab.h>
#include <linux/errno.h>
#include <time.h>
#include "test.h"

#define NSEC_PER_SEC	1000000000L

static long long benchmark_iter(struct radix_tree_root *root, bool tagged)
{
	volatile unsigned long sink = 0;
	struct radix_tree_iter iter;
	struct timespec start, finish;
	long long nsec;
	int l, loops = 1;
	void **slot;

#ifdef BENCHMARK
again:
#endif
	clock_gettime(CLOCK_MONOTONIC, &start);
	for (l = 0; l < loops; l++) {
		if (tagged) {
			radix_tree_for_each_tagged(slot, root, &iter, 0, 0)
				sink ^= (unsigned long)slot;
		} else {
			radix_tree_for_each_slot(slot, root, &iter, 0)
				sink ^= (unsigned long)slot;
		}
	}
	clock_gettime(CLOCK_MONOTONIC, &finish);

	nsec = (finish.tv_sec - start.tv_sec) * NSEC_PER_SEC +
	       (finish.tv_nsec - start.tv_nsec);

#ifdef BENCHMARK
	if (loops == 1 && nsec * 5 < NSEC_PER_SEC) {
		loops = NSEC_PER_SEC / nsec / 4 + 1;
		goto again;
	}
#endif

	nsec /= loops;
	return nsec;
}

static void benchmark_size(unsigned long size, unsigned long step, int order)
{
	RADIX_TREE(tree, GFP_KERNEL);
	long long normal, tagged;
	unsigned long index;

	for (index = 0 ; index < size ; index += step) {
		item_insert_order(&tree, index, order);
		radix_tree_tag_set(&tree, index, 0);
	}

	tagged = benchmark_iter(&tree, true);
	normal = benchmark_iter(&tree, false);

	printf("Size %ld, step %6ld, order %d tagged %10lld ns, normal %10lld ns\n",
		size, step, order, tagged, normal);

	item_kill_tree(&tree);
	rcu_barrier();
}

void benchmark(void)
{
	unsigned long size[] = {1 << 10, 1 << 20, 0};
	unsigned long step[] = {1, 2, 7, 15, 63, 64, 65,
				128, 256, 512, 12345, 0};
	int c, s;

	printf("starting benchmarks\n");
	printf("RADIX_TREE_MAP_SHIFT = %d\n", RADIX_TREE_MAP_SHIFT);

	for (c = 0; size[c]; c++)
		for (s = 0; step[s]; s++)
			benchmark_size(size[c], step[s], 0);

	for (c = 0; size[c]; c++)
		for (s = 0; step[s]; s++)
			benchmark_size(size[c], step[s] << 9, 9);
}
ption>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?id=c73e44269369e936165f0f9b61f1f09a11dae01c'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include?id=c73e44269369e936165f0f9b61f1f09a11dae01c'>include</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/trace?id=c73e44269369e936165f0f9b61f1f09a11dae01c'>trace</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/trace/events?id=c73e44269369e936165f0f9b61f1f09a11dae01c'>events</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/trace/events/timer.h?id=c73e44269369e936165f0f9b61f1f09a11dae01c'>timer.h</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='c73e44269369e936165f0f9b61f1f09a11dae01c'/><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>Vincent &lt;vincent.stehle@laposte.net&gt;</td><td class='right'>2017-01-30 15:06:43 +0100</td></tr>
<tr><th>committer</th><td>David S. Miller &lt;davem@davemloft.net&gt;</td><td class='right'>2017-01-31 13:07:40 -0500</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/trace/events/timer.h?id=c73e44269369e936165f0f9b61f1f09a11dae01c'>c73e44269369e936165f0f9b61f1f09a11dae01c</a> (<a href='/cgit.cgi/linux/net-next.git/patch/include/trace/events/timer.h?id=c73e44269369e936165f0f9b61f1f09a11dae01c'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=c73e44269369e936165f0f9b61f1f09a11dae01c'>e2188e900ba06302f8ed2746cb07edd3efbc5c35</a> /<a href='/cgit.cgi/linux/net-next.git/tree/include/trace/events/timer.h?id=c73e44269369e936165f0f9b61f1f09a11dae01c'>include/trace/events/timer.h</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/trace/events/timer.h?id=040587af31228d82c52267f717c9fcdb65f36335'>040587af31228d82c52267f717c9fcdb65f36335</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include/trace/events/timer.h?id=c73e44269369e936165f0f9b61f1f09a11dae01c&amp;id2=040587af31228d82c52267f717c9fcdb65f36335'>diff</a>)</td></tr></table>
<div class='commit-subject'>net: thunderx: avoid dereferencing xcv when NULL</div><div class='commit-msg'>This fixes the following smatch and coccinelle warnings:

  drivers/net/ethernet/cavium/thunder/thunder_xcv.c:119 xcv_setup_link() error: we previously assumed 'xcv' could be null (see line 118) [smatch]
  drivers/net/ethernet/cavium/thunder/thunder_xcv.c:119:16-20: ERROR: xcv is NULL but dereferenced. [coccinelle]

Fixes: 6465859aba1e66a5 ("net: thunderx: Add RGMII interface type support")
Signed-off-by: Vincent Stehlé &lt;vincent.stehle@laposte.net&gt;
Cc: Sunil Goutham &lt;sgoutham@cavium.com&gt;
Signed-off-by: David S. Miller &lt;davem@davemloft.net&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=c73e44269369e936165f0f9b61f1f09a11dae01c'>Diffstat</a> (limited to 'include/trace/events/timer.h')</div><table summary='diffstat' class='diffstat'>