/*
 * 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);
}
committer</option>
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?id=396bf4cd835e62d70fad4a03a8963e61f19021f2'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/sound?id=396bf4cd835e62d70fad4a03a8963e61f19021f2'>sound</a>/<a href='/cgit.cgi/linux/net-next.git/commit/sound/pci?id=396bf4cd835e62d70fad4a03a8963e61f19021f2'>pci</a>/<a href='/cgit.cgi/linux/net-next.git/commit/sound/pci/emu10k1?id=396bf4cd835e62d70fad4a03a8963e61f19021f2'>emu10k1</a>/<a href='/cgit.cgi/linux/net-next.git/commit/sound/pci/emu10k1/p16v.c?id=396bf4cd835e62d70fad4a03a8963e61f19021f2'>p16v.c</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='396bf4cd835e62d70fad4a03a8963e61f19021f2'/><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>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-02-06 14:16:23 -0800</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-02-06 14:16:23 -0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/sound/pci/emu10k1/p16v.c?id=396bf4cd835e62d70fad4a03a8963e61f19021f2'>396bf4cd835e62d70fad4a03a8963e61f19021f2</a> (<a href='/cgit.cgi/linux/net-next.git/patch/sound/pci/emu10k1/p16v.c?id=396bf4cd835e62d70fad4a03a8963e61f19021f2'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=396bf4cd835e62d70fad4a03a8963e61f19021f2'>79ac8f33554260fea1a8d43e6f8c4c5460115f45</a> /<a href='/cgit.cgi/linux/net-next.git/tree/sound/pci/emu10k1/p16v.c?id=396bf4cd835e62d70fad4a03a8963e61f19021f2'>sound/pci/emu10k1/p16v.c</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/sound/pci/emu10k1/p16v.c?id=d5adbfcd5f7bcc6fa58a41c5c5ada0e5c826ce2c'>d5adbfcd5f7bcc6fa58a41c5c5ada0e5c826ce2c</a> (<a href='/cgit.cgi/linux/net-next.git/diff/sound/pci/emu10k1/p16v.c?id=396bf4cd835e62d70fad4a03a8963e61f19021f2&amp;id2=d5adbfcd5f7bcc6fa58a41c5c5ada0e5c826ce2c'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/sound/pci/emu10k1/p16v.c?id=7c2cf1c4615cc2f576d0604406cdf0065f00b83b'>7c2cf1c4615cc2f576d0604406cdf0065f00b83b</a> (<a href='/cgit.cgi/linux/net-next.git/diff/sound/pci/emu10k1/p16v.c?id=396bf4cd835e62d70fad4a03a8963e61f19021f2&amp;id2=7c2cf1c4615cc2f576d0604406cdf0065f00b83b'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6</div><div class='commit-msg'>Pull crypto fixes from Herbert Xu:

 - use-after-free in algif_aead

 - modular aesni regression when pcbc is modular but absent

 - bug causing IO page faults in ccp

 - double list add in ccp

 - NULL pointer dereference in qat (two patches)

 - panic in chcr

 - NULL pointer dereference in chcr

 - out-of-bound access in chcr

* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
  crypto: chcr - Fix key length for RFC4106
  crypto: algif_aead - Fix kernel panic on list_del
  crypto: aesni - Fix failure when pcbc module is absent
  crypto: ccp - Fix double add when creating new DMA command
  crypto: ccp - Fix DMA operations when IOMMU is enabled
  crypto: chcr - Check device is allocated before use
  crypto: chcr - Fix panic on dma_unmap_sg
  crypto: qat - zero esram only for DH85x devices
  crypto: qat - fix bar discovery for c62x
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=396bf4cd835e62d70fad4a03a8963e61f19021f2'>Diffstat</a> (limited to 'sound/pci/emu10k1/p16v.c')</div><table summary='diffstat' class='diffstat'>