1 /*
2 * Copyright (c) 2011 Apple Computer, Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. The rights granted to you under the License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
18 * The Original Code and all software distributed under the License are
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23 * Please see the License for the specific language governing rights and
24 * limitations under the License.
25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27 */
28
29 #include <mach/mach_types.h>
30 #include <kern/task.h> /* task_ledgers */
31 #include <kern/ledger.h>
32
33 #include <kperf/kperf.h>
34
35 #include <kperf/buffer.h>
36 #include <kperf/context.h>
37 #include <kperf/meminfo.h>
38
39 /* collect current memory info */
40 void
kperf_meminfo_sample(task_t task,struct meminfo * mi)41 kperf_meminfo_sample(task_t task, struct meminfo *mi)
42 {
43 ledger_amount_t credit, debit;
44 kern_return_t kr;
45
46 assert(mi != NULL);
47
48 BUF_INFO(PERF_MI_SAMPLE | DBG_FUNC_START);
49
50 mi->phys_footprint = get_task_phys_footprint(task);
51
52 kr = ledger_get_entries(task->ledger, task_ledgers.purgeable_volatile,
53 &credit, &debit);
54 if (kr == KERN_SUCCESS) {
55 mi->purgeable_volatile = credit - debit;
56 } else {
57 mi->purgeable_volatile = UINT64_MAX;
58 }
59
60 kr = ledger_get_entries(task->ledger,
61 task_ledgers.purgeable_volatile_compressed,
62 &credit, &debit);
63 if (kr == KERN_SUCCESS) {
64 mi->purgeable_volatile_compressed = credit - debit;
65 } else {
66 mi->purgeable_volatile_compressed = UINT64_MAX;
67 }
68
69 BUF_INFO(PERF_MI_SAMPLE | DBG_FUNC_END);
70 }
71
72 /* log an existing sample into the buffer */
73 void
kperf_meminfo_log(struct meminfo * mi)74 kperf_meminfo_log(struct meminfo *mi)
75 {
76 BUF_DATA(PERF_MI_DATA, mi->phys_footprint, mi->purgeable_volatile,
77 mi->purgeable_volatile_compressed);
78 }
79