diff options
Diffstat (limited to 'contrib/netbsd-tests/rump/kernspace/alloc.c')
| -rw-r--r-- | contrib/netbsd-tests/rump/kernspace/alloc.c | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/contrib/netbsd-tests/rump/kernspace/alloc.c b/contrib/netbsd-tests/rump/kernspace/alloc.c new file mode 100644 index 0000000..5cbcfb6 --- /dev/null +++ b/contrib/netbsd-tests/rump/kernspace/alloc.c @@ -0,0 +1,122 @@ +/* $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'; + } +} |
