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File: [cvs.NetBSD.org] / src / tests / rump / kernspace / alloc.c (download)

Revision 1.1, Mon Jun 14 21:06:09 2010 UTC (11 years, 5 months ago) by pooka
Branch: MAIN
CVS Tags: yamt-pagecache-tag8, yamt-pagecache-base9, yamt-pagecache-base8, yamt-pagecache-base7, yamt-pagecache-base6, yamt-pagecache-base5, yamt-pagecache-base4, yamt-pagecache-base3, yamt-pagecache-base2, yamt-pagecache-base, yamt-pagecache, tls-maxphys-base, tls-maxphys, tls-earlyentropy-base, tls-earlyentropy, riastradh-xf86-video-intel-2-7-1-pre-2-21-15, riastradh-drm2-base3, riastradh-drm2-base2, riastradh-drm2-base1, riastradh-drm2-base, riastradh-drm2, prg-localcount2-base3, prg-localcount2-base2, prg-localcount2-base1, prg-localcount2-base, prg-localcount2, phil-wifi-base, phil-wifi-20200421, phil-wifi-20200411, phil-wifi-20200406, phil-wifi-20191119, phil-wifi-20190609, phil-wifi, pgoyette-localcount-base, pgoyette-localcount-20170426, pgoyette-localcount-20170320, pgoyette-localcount-20170107, pgoyette-localcount-20161104, pgoyette-localcount-20160806, pgoyette-localcount-20160726, pgoyette-localcount, pgoyette-compat-merge-20190127, pgoyette-compat-base, pgoyette-compat-20190127, pgoyette-compat-20190118, pgoyette-compat-1226, pgoyette-compat-1126, pgoyette-compat-1020, pgoyette-compat-0930, pgoyette-compat-0906, pgoyette-compat-0728, pgoyette-compat-0625, pgoyette-compat-0521, pgoyette-compat-0502, pgoyette-compat-0422, pgoyette-compat-0415, pgoyette-compat-0407, pgoyette-compat-0330, pgoyette-compat-0322, pgoyette-compat-0315, pgoyette-compat, perseant-stdc-iso10646-base, perseant-stdc-iso10646, netbsd-9-base, netbsd-9-2-RELEASE, netbsd-9-1-RELEASE, netbsd-9-0-RELEASE, netbsd-9-0-RC2, netbsd-9-0-RC1, netbsd-9, netbsd-8-base, netbsd-8-2-RELEASE, netbsd-8-1-RELEASE, netbsd-8-1-RC1, netbsd-8-0-RELEASE, netbsd-8-0-RC2, netbsd-8-0-RC1, netbsd-8, netbsd-7-nhusb-base-20170116, netbsd-7-nhusb-base, netbsd-7-nhusb, netbsd-7-base, netbsd-7-2-RELEASE, netbsd-7-1-RELEASE, netbsd-7-1-RC2, netbsd-7-1-RC1, netbsd-7-1-2-RELEASE, netbsd-7-1-1-RELEASE, netbsd-7-1, netbsd-7-0-RELEASE, netbsd-7-0-RC3, netbsd-7-0-RC2, netbsd-7-0-RC1, netbsd-7-0-2-RELEASE, netbsd-7-0-1-RELEASE, netbsd-7-0, netbsd-7, netbsd-6-base, netbsd-6-1-RELEASE, netbsd-6-1-RC4, netbsd-6-1-RC3, netbsd-6-1-RC2, netbsd-6-1-RC1, netbsd-6-1-5-RELEASE, netbsd-6-1-4-RELEASE, netbsd-6-1-3-RELEASE, netbsd-6-1-2-RELEASE, netbsd-6-1-1-RELEASE, netbsd-6-1, netbsd-6-0-RELEASE, netbsd-6-0-RC2, netbsd-6-0-RC1, netbsd-6-0-6-RELEASE, netbsd-6-0-5-RELEASE, netbsd-6-0-4-RELEASE, netbsd-6-0-3-RELEASE, netbsd-6-0-2-RELEASE, netbsd-6-0-1-RELEASE, netbsd-6-0, netbsd-6, matt-nb8-mediatek-base, matt-nb8-mediatek, matt-nb6-plus-nbase, matt-nb6-plus-base, matt-nb6-plus, matt-mips64-premerge-20101231, localcount-20160914, is-mlppp-base, is-mlppp, cjep_sun2x-base1, cjep_sun2x-base, cjep_sun2x, cjep_staticlib_x-base1, cjep_staticlib_x-base, cjep_staticlib_x, cherry-xenmp-base, cherry-xenmp, bouyer-socketcan-base1, bouyer-socketcan-base, bouyer-socketcan, bouyer-quota2-nbase, bouyer-quota2-base, bouyer-quota2, agc-symver-base, agc-symver, HEAD

add a vm allocator test which tests that:
* RUMP_MEMLIMIT works
* allocating memory with PR_NOWAIT will fail immediately if no memory
  is available and PR_WAITOK will wait for memory to be available

/*	$NetBSD: alloc.c,v 1.1 2010/06/14 21:06:09 pooka Exp $	*/

/*-
 * Copyright (c) 2010 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND
 * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <sys/cdefs.h>
#if !defined(lint)
__RCSID("$NetBSD: alloc.c,v 1.1 2010/06/14 21:06:09 pooka Exp $");
#endif /* !lint */

#include <sys/param.h>
#include <sys/condvar.h>
#include <sys/kmem.h>
#include <sys/kthread.h>
#include <sys/mutex.h>
#include <sys/pool.h>
#include <sys/proc.h>

#include <uvm/uvm.h>

#include <rump/rumpuser.h>
#include "kernspace.h"

static void *store[32];
static struct pool pp1, pp2;

static kmutex_t mtx;
static kcondvar_t kcv;
static int curstat;

static void
hthr(void *arg)
{
	int i;

	mutex_enter(&mtx);
	curstat++;
	cv_signal(&kcv);

	while (curstat < 2)
		cv_wait(&kcv, &mtx);
	mutex_exit(&mtx);

	/* try to guarantee that the sleep is triggered in PR_WAITOK */
	while ((kernel_map->flags & VM_MAP_WANTVA) == 0)
		kpause("take5", false, 1, NULL);

	for (i = 0; i < __arraycount(store); i++) {
		pool_put(&pp1, store[i]);
	}

	kthread_exit(0);
}

void
rumptest_alloc(size_t thelimit)
{
	char *c;
	int succ, i;

	mutex_init(&mtx, MUTEX_DEFAULT, IPL_NONE);
	cv_init(&kcv, "venailu");

	kthread_create(PRI_NONE, KTHREAD_MPSAFE, NULL, hthr, NULL, NULL, "h");

	pool_init(&pp1, 1024, 0, 0, 0, "vara-allas",
	    &pool_allocator_nointr, IPL_NONE);
	pool_init(&pp2, 1024, 0, 0, 0, "allas",
	    &pool_allocator_nointr, IPL_NONE);
	
	for (i = 0; i < __arraycount(store); i++) {
		store[i] = pool_get(&pp1, PR_NOWAIT);
		if (store[i] == NULL) {
			panic("pool_get store failed");
		}
	}

	/* wait until other thread runs */
	mutex_enter(&mtx);
	while (curstat == 0)
		cv_wait(&kcv, &mtx);
	mutex_exit(&mtx);

	for (succ = 0;; succ++) {
		if (succ * 1024 > thelimit)
			panic("managed to allocate over limit");
		if ((c = pool_get(&pp2, PR_NOWAIT)) == NULL) {
			mutex_enter(&mtx);
			curstat++;
			cv_signal(&kcv);
			mutex_exit(&mtx);
			if (pool_get(&pp2, PR_WAITOK) == NULL)
				panic("pool get PR_WAITOK failed");
			break;
		}
		*c = 'a';
	}
}