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| author | Monty Brandenberg <monty@lindenlab.com> | 2013-08-29 13:04:05 -0400 |
|---|---|---|
| committer | Monty Brandenberg <monty@lindenlab.com> | 2013-08-29 13:04:05 -0400 |
| commit | d706b5717785a318c053055c49589b16f9633681 (patch) | |
| tree | b4705213d86607a59e92b93b5a5bba65f130456f | |
| parent | af17c34d4325d9c4b0941e77c6171129e1fc14a2 (diff) | |
Document the fast timer testing apparatus a bit.
| -rwxr-xr-x | indra/newview/llmeshrepository.cpp | 21 |
1 files changed, 17 insertions, 4 deletions
diff --git a/indra/newview/llmeshrepository.cpp b/indra/newview/llmeshrepository.cpp index 2f43ee3ccb..3c964160b5 100755 --- a/indra/newview/llmeshrepository.cpp +++ b/indra/newview/llmeshrepository.cpp @@ -268,6 +268,9 @@ // locally-generated 500 status. // 0x08 As with 0x04 but for the upload operation. // +// For major changes, see the LL_MESH_FASTTIMER_ENABLE below and +// instructions for looking for frame stalls using fast timers. +// // *TODO: Work list for followup actions: // * Review anything marked as unsafe above, verify if there are real issues. // * See if we can put ::run() into a hard sleep. May not actually perform better @@ -346,15 +349,25 @@ static unsigned int metrics_teleport_start_count = 0; boost::signals2::connection metrics_teleport_started_signal; static void teleport_started(); static bool is_retryable(LLCore::HttpStatus status); -static LLFastTimer::DeclareTimer FTM_MESH_FETCH("Mesh Fetch"); // Enable here or in build environment to get fasttimer data on mesh fetches. -#define LL_FASTTIMER_MESH_ENABLE 1 -#if LL_FASTTIMER_MESH_ENABLE +// +// Typically, this is used to perform A/B testing using the +// fasttimer console (shift-ctrl-9). This is done by looking +// for stalls due to lock contention between the main thread +// and the repository and HTTP code. In a release viewer, +// these appear as ping-time or worse spikes in frame time. +// With this instrumentation enabled, a stall will appear +// under the 'Mesh Fetch' timer which will be either top-level +// or under 'Render' time. +#define LL_MESH_FASTTIMER_ENABLE 1 +#if LL_MESH_FASTTIMER_ENABLE +static LLFastTimer::DeclareTimer FTM_MESH_FETCH("Mesh Fetch"); + #define MESH_FASTTIMER_DEFBLOCK LLFastTimer meshtimer(FTM_MESH_FETCH) #else #define MESH_FASTTIMER_DEFBLOCK -#endif // LL_FASTTIMER_MESH_ENABLE +#endif // LL_MESH_FASTTIMER_ENABLE //get the number of bytes resident in memory for given volume U32 get_volume_memory_size(const LLVolume* volume) |