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/* Copyright 2013 10gen Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the GNU Affero General Public License in all respects
* for all of the code used other than as permitted herein. If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. If you do not
* wish to do so, delete this exception statement from your version. If you
* delete this exception statement from all source files in the program,
* then also delete it in the license file.
*/
#include "mongo/platform/basic.h"
#include <third_party/gperftools-2.2/src/gperftools/malloc_extension.h>
#include "mongo/db/commands/server_status.h"
namespace mongo {
namespace {
class TCMallocServerStatusSection : public ServerStatusSection {
public:
TCMallocServerStatusSection() : ServerStatusSection("tcmalloc") {}
virtual bool includeByDefault() const { return false; }
virtual BSONObj generateSection(const BSONElement& configElement) const {
BSONObjBuilder builder;
// For a list of properties see the "Generic Tcmalloc Status" section of
// http://google-perftools.googlecode.com/svn/trunk/doc/tcmalloc.html and
// http://code.google.com/p/gperftools/source/browse/src/gperftools/malloc_extension.h
{
BSONObjBuilder sub(builder.subobjStart("generic"));
appendNumericPropertyIfAvailable(sub, "current_allocated_bytes",
"generic.current_allocated_bytes");
appendNumericPropertyIfAvailable(sub, "heap_size",
"generic.heap_size");
}
{
BSONObjBuilder sub(builder.subobjStart("tcmalloc"));
appendNumericPropertyIfAvailable(sub, "pageheap_free_bytes",
"tcmalloc.pageheap_free_bytes");
appendNumericPropertyIfAvailable(sub, "pageheap_unmapped_bytes",
"tcmalloc.pageheap_unmapped_bytes");
appendNumericPropertyIfAvailable(sub, "max_total_thread_cache_bytes",
"tcmalloc.max_total_thread_cache_bytes");
appendNumericPropertyIfAvailable(sub, "current_total_thread_cache_bytes",
"tcmalloc.current_total_thread_cache_bytes");
// Not including tcmalloc.slack_bytes since it is deprecated.
// These are not available in our version but are available with use-system-tcmalloc
appendNumericPropertyIfAvailable(sub, "central_cache_free_bytes",
"tcmalloc.central_cache_free_bytes");
appendNumericPropertyIfAvailable(sub, "transfer_cache_free_bytes",
"tcmalloc.transfer_cache_free_bytes");
appendNumericPropertyIfAvailable(sub, "thread_cache_free_bytes",
"tcmalloc.thread_cache_free_bytes");
}
char buffer[4096];
MallocExtension::instance()->GetStats(buffer, sizeof(buffer));
builder.append("formattedString", buffer);
return builder.obj();
}
private:
static void appendNumericPropertyIfAvailable(BSONObjBuilder& builder,
StringData bsonName,
const char* property) {
size_t value;
if (MallocExtension::instance()->GetNumericProperty(property, &value))
builder.appendNumber(bsonName, value);
}
} tcmallocServerStatusSection;
}
}
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