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/* - mode: c; c-basic-offset: 2; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
*
* Copyright (C) 2010 Brian Aker
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef PLUGIN_PERFORMANCE_DICTIONARY_QUERY_USAGE_H
#define PLUGIN_PERFORMANCE_DICTIONARY_QUERY_USAGE_H
#include "drizzled/internal/getrusage.h"
#include "drizzled/session.h"
namespace performance_dictionary {
#define USAGE_MAX_KEPT 5
struct query_usage {
std::string query;
struct rusage start;
struct rusage buffer;
query_usage()
{
memset(&start, 0, sizeof(struct rusage));
memset(&buffer, 0, sizeof(struct rusage));
}
void set(const std::string &sql, const struct rusage &arg)
{
if (getrusage(RUSAGE_THREAD, &buffer))
{
memset(&start, 0, sizeof(struct rusage));
memset(&buffer, 0, sizeof(struct rusage));
return;
}
query= sql.substr(0, 512);
start= arg;
buffer.ru_utime.tv_sec -= start.ru_utime.tv_sec;
buffer.ru_utime.tv_usec -= start.ru_utime.tv_usec;
buffer.ru_stime.tv_sec -= start.ru_stime.tv_sec;
buffer.ru_stime.tv_usec -= start.ru_stime.tv_usec;
buffer.ru_maxrss -= start.ru_maxrss;
buffer.ru_ixrss -= start.ru_ixrss;
buffer.ru_idrss -= start.ru_idrss;
buffer.ru_isrss -= start.ru_isrss;
buffer.ru_minflt -= start.ru_minflt;
buffer.ru_majflt -= start.ru_majflt;
buffer.ru_nswap -= start.ru_nswap;
buffer.ru_inblock -= start.ru_inblock;
buffer.ru_oublock -= start.ru_oublock;
buffer.ru_msgsnd -= start.ru_msgsnd;
buffer.ru_msgrcv -= start.ru_msgrcv;
buffer.ru_nsignals -= start.ru_nsignals;
buffer.ru_nvcsw -= start.ru_nvcsw;
buffer.ru_nivcsw -= start.ru_nivcsw;
}
const struct rusage &delta(void) const
{
return buffer;
}
~query_usage()
{ }
};
typedef std::list <query_usage> Query_list;
class QueryUsage : public drizzled::util::Storable {
public:
Query_list query_list;
QueryUsage()
{
query_list.resize(USAGE_MAX_KEPT);
}
void push(const std::string &sql, const struct rusage &arg)
{
Query_list::iterator it= query_list.end();
it--;
query_list.splice(query_list.begin(), query_list, it);
query_list.front().set(sql, arg);
}
Query_list &list(void)
{
return query_list;
}
};
} /* namespace performance_dictionary */
#endif /* PLUGIN_PERFORMANCE_DICTIONARY_QUERY_USAGE_H */
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