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/* Copyright 2013 10gen Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "mongo/platform/basic.h"
#include <third_party/gperftools-2.0/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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