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/**
* @file llviewerassetstats.h
* @brief Client-side collection of asset request statistics
*
* $LicenseInfo:firstyear=2010&license=viewergpl$
*
* Copyright (c) 2010, Linden Research, Inc.
*
* Second Life Viewer Source Code
* The source code in this file ("Source Code") is provided by Linden Lab
* to you under the terms of the GNU General Public License, version 2.0
* ("GPL"), unless you have obtained a separate licensing agreement
* ("Other License"), formally executed by you and Linden Lab. Terms of
* the GPL can be found in doc/GPL-license.txt in this distribution, or
* online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
*
* There are special exceptions to the terms and conditions of the GPL as
* it is applied to this Source Code. View the full text of the exception
* in the file doc/FLOSS-exception.txt in this software distribution, or
* online at
* http://secondlifegrid.net/programs/open_source/licensing/flossexception
*
* By copying, modifying or distributing this software, you acknowledge
* that you have read and understood your obligations described above,
* and agree to abide by those obligations.
*
* ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
* WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
* COMPLETENESS OR PERFORMANCE.
* $/LicenseInfo$
*/
#ifndef LL_LLVIEWERASSETSTATUS_H
#define LL_LLVIEWERASSETSTATUS_H
#include "linden_common.h"
#include "llpointer.h"
#include "llrefcount.h"
#include "llviewerassettype.h"
#include "llviewerassetstorage.h"
#include "llsimplestat.h"
#include "llsd.h"
/**
* @class LLViewerAssetStats
* @brief Records performance aspects of asset access operations.
*
* This facility is derived from a very similar simulator-based
* one, LLSimAssetStats. It's function is to count asset access
* operations and characterize response times. Collected data
* are binned in several dimensions:
*
* - Asset types collapsed into a few aggregated categories
* - By simulator UUID
* - By transport mechanism (HTTP vs MessageSystem)
* - By persistence (temp vs non-temp)
*
* Statistics collected are fairly basic at this point:
*
* - Counts of enqueue and dequeue operations
* - Min/Max/Mean of asset transfer operations
*
* This collector differs from the simulator-based on in a
* number of ways:
*
* - The front-end/back-end distinction doesn't exist in viewer
* code
* - Multiple threads must be safely accomodated in the viewer
*
* Access to results is by conversion to an LLSD with some standardized
* key names. The intent of this structure is that it be emitted as
* standard syslog-based metrics formatting where it can be picked
* up by interested parties.
*
* For convenience, a set of free functions in namespace
* LLViewerAssetStatsFF is provided for conditional test-and-call
* operations.
*/
class LLViewerAssetStats
{
public:
enum EViewerAssetCategories
{
EVACTextureTempHTTPGet, //< Texture GETs
EVACTextureTempUDPGet, //< Texture GETs
EVACTextureNonTempHTTPGet, //< Texture GETs
EVACTextureNonTempUDPGet, //< Texture GETs
EVACWearableUDPGet, //< Wearable GETs
EVACSoundUDPGet, //< Sound GETs
EVACGestureUDPGet, //< Gesture GETs
EVACOtherGet, //< Other GETs
EVACCount // Must be last
};
/**
* Type for duration and other time values in the metrics. Selected
* for compatibility with the pre-existing timestamp on the texture
* fetcher class, LLTextureFetch.
*/
typedef U64 duration_t;
/**
* Collected data for a single region visited by the avatar.
*/
class PerRegionStats : public LLRefCount
{
public:
PerRegionStats(const LLUUID & region_id)
: LLRefCount(),
mRegionID(region_id)
{
reset();
}
// Default assignment and destructor are correct.
void reset();
public:
LLUUID mRegionID;
struct
{
LLSimpleStatCounter mEnqueued;
LLSimpleStatCounter mDequeued;
LLSimpleStatMMM<duration_t> mResponse;
} mRequests [EVACCount];
};
public:
LLViewerAssetStats();
// Default destructor is correct.
LLViewerAssetStats & operator=(const LLViewerAssetStats &); // Not defined
// Clear all metrics data. This leaves the currently-active region
// in place but with zero'd data for all metrics. All other regions
// are removed from the collection map.
void reset();
// Set hidden region argument and establish context for subsequent
// collection calls.
void setRegionID(const LLUUID & region_id);
// Non-Cached GET Requests
void recordGetEnqueued(LLViewerAssetType::EType at, bool with_http, bool is_temp);
void recordGetDequeued(LLViewerAssetType::EType at, bool with_http, bool is_temp);
void recordGetServiced(LLViewerAssetType::EType at, bool with_http, bool is_temp, duration_t duration);
// Retrieve current metrics for all visited regions.
const LLSD asLLSD() const;
protected:
typedef std::map<LLUUID, LLPointer<PerRegionStats> > PerRegionContainer;
// Region of the currently-active region. Always valid but may
// be a NULL UUID after construction or when explicitly set. Unchanged
// by a reset() call.
LLUUID mRegionID;
// Pointer to metrics collection for currently-active region. Always
// valid and unchanged after reset() though contents will be changed.
// Always points to a collection contained in mRegionStats.
LLPointer<PerRegionStats> mCurRegionStats;
// Metrics data for all regions during one collection cycle
PerRegionContainer mRegionStats;
};
/**
* Global stats collectors one for each independent thread where
* assets and other statistics are gathered. The globals are
* expected to be created at startup time and then picked up by
* their respective threads afterwards. A set of free functions
* are provided to access methods behind the globals while both
* minimally disrupting visual flow and supplying a description
* of intent.
*
* Expected thread assignments:
*
* - Main: main() program execution thread
* - Thread1: TextureFetch worker thread
*/
extern LLViewerAssetStats * gViewerAssetStatsMain;
extern LLViewerAssetStats * gViewerAssetStatsThread1;
namespace LLViewerAssetStatsFF
{
/**
* We have many timers, clocks etc. in the runtime. This is the
* canonical timestamp for these metrics which is compatible with
* the pre-existing timestamping in the texture fetcher.
*/
inline LLViewerAssetStats::duration_t get_timestamp()
{
return LLTimer::getTotalTime();
}
/**
* Region context, event and duration loggers for the Main thread.
*/
void set_region_main(const LLUUID & region_id);
void record_enqueue_main(LLViewerAssetType::EType at, bool with_http, bool is_temp);
void record_dequeue_main(LLViewerAssetType::EType at, bool with_http, bool is_temp);
void record_response_main(LLViewerAssetType::EType at, bool with_http, bool is_temp,
LLViewerAssetStats::duration_t duration);
/**
* Region context, event and duration loggers for Thread 1.
*/
void set_region_thread1(const LLUUID & region_id);
void record_enqueue_thread1(LLViewerAssetType::EType at, bool with_http, bool is_temp);
void record_dequeue_thread1(LLViewerAssetType::EType at, bool with_http, bool is_temp);
void record_response_thread1(LLViewerAssetType::EType at, bool with_http, bool is_temp,
LLViewerAssetStats::duration_t duration);
/**
* @brief Allocation and deallocation of globals.
*
* init() should be called before threads are started that will access it though
* you'll likely get away with calling it afterwards. cleanup() should only be
* called after threads are shutdown to prevent races on the global pointers.
*/
void init();
void cleanup();
} // namespace LLViewerAssetStatsFF
#endif // LL_LLVIEWERASSETSTATUS_H
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