xnu-3247.1.106.tar.gz

[apple/xnu.git] / osfmk / kperf / meminfo.c

diff --git a/osfmk/kperf/meminfo.c b/osfmk/kperf/meminfo.c
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+/*
+ * Copyright (c) 2011 Apple Computer, Inc. All rights reserved.
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
+ * 
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ * 
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ * 
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ * 
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
+ */
+
+#include <mach/mach_types.h>
+#include <kern/task.h> /* task_ledgers */
+#include <kern/thread.h>
+#include <kern/ledger.h>
+
+#include <kperf/kperf.h>
+#include <kperf/kperf_arch.h>
+
+#include <kperf/buffer.h>
+#include <kperf/context.h>
+#include <kperf/meminfo.h>
+
+/* collect current memory info */
+void
+kperf_meminfo_sample(struct meminfo *mi, struct kperf_context *context)
+{
+       task_t task;
+       ledger_amount_t credit, debit;
+       uint64_t phys_footprint;
+       kern_return_t kr;
+
+       assert(mi);
+       assert(context);
+
+       thread_t thread = context->cur_thread;
+
+       BUF_INFO1(PERF_MI_SAMPLE, (uintptr_t)thread_tid(thread));
+
+       task = get_threadtask(thread);
+
+       kr = kperf_get_phys_footprint(task, &phys_footprint);
+       if (kr == KERN_SUCCESS) {
+               mi->phys_footprint = phys_footprint;
+       } else {
+               mi->phys_footprint = UINT64_MAX;
+       }
+
+       kr = ledger_get_entries(task->ledger, task_ledgers.purgeable_volatile,
+                               &credit, &debit);
+       if (kr == KERN_SUCCESS) {
+               mi->purgeable_volatile = credit - debit;
+       } else {
+               mi->purgeable_volatile = UINT64_MAX;
+       }
+
+       kr = ledger_get_entries(task->ledger,
+                               task_ledgers.purgeable_volatile_compressed,
+                               &credit, &debit);
+       if (kr == KERN_SUCCESS) {
+               mi->purgeable_volatile_compressed = credit - debit;
+       } else {
+               mi->purgeable_volatile_compressed = UINT64_MAX;
+       }
+}
+
+/* log an existing sample into the buffer */
+void
+kperf_meminfo_log(struct meminfo *mi)
+{
+       BUF_DATA3(PERF_MI_DATA, mi->phys_footprint, mi->purgeable_volatile,
+                 mi->purgeable_volatile_compressed);
+}
+