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Diffstat (limited to 'doc/tuning.md')
| -rw-r--r-- | doc/tuning.md | 39 |
1 files changed, 32 insertions, 7 deletions
diff --git a/doc/tuning.md b/doc/tuning.md index 5125387..47ad0bb 100644 --- a/doc/tuning.md +++ b/doc/tuning.md @@ -1,6 +1,7 @@ # Tuning Guide ## Content Overview +* [Benchmark](#benchmark) * [Windows](#windows) * [NVIDIA Backend](#nvidia-backend) * [Choose Value for `threads` and `blocks`](#choose-value-for-threads-and-blocks) @@ -8,11 +9,18 @@ * [AMD Backend](#amd-backend) * [Choose `intensity` and `worksize`](#choose-intensity-and-worksize) * [Add more GPUs](#add-more-gpus) + * [disable comp_mode](#disable-comp_mode) + * [change the scratchpad memory pattern](change-the-scratchpad-memory-pattern) * [Increase Memory Pool](#increase-memory-pool) * [Scratchpad Indexing](#scratchpad-indexing) * [CPU Backend](#cpu-backend) * [Choose Value for `low_power_mode`](#choose-value-for-low_power_mode) +## Benchmark +To benchmark the miner speed there are two ways. + - Mine against a pool end press the key `h` after 30 sec to see the hash report. + - Start the miner with the cli option `--benchmark BLOCKVERSION`. The miner will not connect to any pool and performs a 60sec performance benchmark with all enabled back-ends. + ## Windows "Run As Administrator" prompt (UAC) confirmation is needed to use large pages on Windows 7. On Windows 10 it is only needed once to set up the account to use them. @@ -46,8 +54,12 @@ To add a new GPU you need to add a new config set to `gpu_threads_conf`. ``` "gpu_threads_conf" : [ - { "index" : 0, "threads" : 17, "blocks" : 60, "bfactor" : 0, "bsleep" : 0, "affine_to_cpu" : false}, - { "index" : 1, "threads" : 17, "blocks" : 60, "bfactor" : 0, "bsleep" : 0, "affine_to_cpu" : false}, + { "index" : 0, "threads" : 17, "blocks" : 60, "bfactor" : 0, "bsleep" : 0, + "affine_to_cpu" : false, "sync_mode" : 3, + }, + { "index" : 1, "threads" : 17, "blocks" : 60, "bfactor" : 0, "bsleep" : 0, + "affine_to_cpu" : false, "sync_mode" : 3, + }, ], ``` @@ -70,13 +82,26 @@ If you are unsure of either GPU or platform index value, you can use `clinfo` to ``` "gpu_threads_conf" : [ - { "index" : 0, "intensity" : 1000, "worksize" : 8, "affine_to_cpu" : false }, - { "index" : 1, "intensity" : 1000, "worksize" : 8, "affine_to_cpu" : false }, + { "index" : 0, "intensity" : 1000, "worksize" : 8, "affine_to_cpu" : false, + "strided_index" : true, "mem_chunk" : 2, "comp_mode" : true + }, + { "index" : 1, "intensity" : 1000, "worksize" : 8, "affine_to_cpu" : false, + "strided_index" : true, "mem_chunk" : 2, "comp_mode" : true + }, ], "platform_index" : 0, ``` +### disable comp_mode + +`comp_mode` means compatibility mode and removes some checks in compute kernel those takes care that the miner can be used on a wide range of AMD/OpenCL GPU devices. +To avoid miner crashes the `intensity` should be a multiple of `worksize` if `comp_mode` is `false`. + +### change the scratchpad memory pattern + +By changing `strided_index` to `2` the number of contiguous elements (a 16 byte) for one miner thread can be fine tuned with the option `mem_chunk`. + ### Increase Memory Pool By setting the following environment variables before the miner is started OpenCl allows the miner to more threads. @@ -84,9 +109,9 @@ This variables must be set each time before the miner is started else it could b ``` export GPU_FORCE_64BIT_PTR=1 -export GPU_MAX_HEAP_SIZE=99 -export GPU_MAX_ALLOC_PERCENT=99 -export GPU_SINGLE_ALLOC_PERCENT=99 +export GPU_MAX_HEAP_SIZE=100 +export GPU_MAX_ALLOC_PERCENT=100 +export GPU_SINGLE_ALLOC_PERCENT=100 ``` *Note:* Windows user must use `set` instead of `export` to define an environment variable. |
