[Tarantool-patches] [PATCH v2 luajit 12/41] perf: adjust life in LuaJIT-benches

[Sergey Bronnikov]

Hi, Sergey!

Thanks for the patch! LGTM

Sergey

On 12/26/25 12:17, Sergey Kaplun wrote:
> This patch adjusts the aforementioned test to use the benchmark
> framework introduced before. The default arguments are adjusted
> according to the <PARAM_x86.txt> file.
>
> The output is redirected to /dev/null. The checker tests the result
> after the exact amount of iterations for the fixed field (as it is
> declared in the original benchmark).
> ---
>   perf/LuaJIT-benches/life.lua | 89 ++++++++++++++++++++++++++++++++++--
>   1 file changed, 86 insertions(+), 3 deletions(-)
>
> diff --git a/perf/LuaJIT-benches/life.lua b/perf/LuaJIT-benches/life.lua
> index 911d9fe1..dbf26fac 100644
> --- a/perf/LuaJIT-benches/life.lua
> +++ b/perf/LuaJIT-benches/life.lua
> @@ -1,11 +1,19 @@
>   -- life.lua
> --- original by Dave Bollinger<DBollinger at compuserve.com> posted to lua-l
> +-- The benchmark to check the performance of array-like data
> +-- structures with RW access. John Horton Conway's "Game of Life"
> +-- cellular automaton.
> +-- For the details see:
> +--https://en.wikipedia.org/wiki/Conway%27s_Game_of_Life
> +-- Original by Dave Bollinger<DBollinger at compuserve.com> posted
> +-- to lua-l:
> +--http://lua-users.org/lists/lua-l/1999-12/msg00003.html
>   -- modified to use ANSI terminal escape sequences
>   -- modified to use for instead of while
>   
> +local bench = require('bench').new(arg)
> +
>   local write=io.write
>   
> -ALIVE="�"	DEAD="�"
>   ALIVE="O"	DEAD="-"
>   
>   function delay() -- NOTE: SYSTEM-DEPENDENT, adjust as necessary
> @@ -106,6 +114,81 @@ function LIFE(w,h)
>       if gen>2000 then break end
>       --delay()		-- no delay
>     end
> +  return thisgen
>   end
>   
> -LIFE(40,20)
> +-- Result of the LIFE(40, 20) after 2000 generations.
> +--[[
> +----------------------------------------
> +----------------------------------------
> +--OO--------------------------O---------
> +-OO--------------------------O-O--------
> +---O--------------------------O---------
> +----------------------------------------
> +----------------------------------------
> +----------------------------------------
> +----------------------------------------
> +----------------------------------------
> +----------------------------------------
> +----------------------------------------
> +---O------------------------------------
> +--O-O-----------------------------------
> +--O-O-----------------------------------
> +---O------------------------------------
> +----------------------------------------
> +-------OO-------------------------------
> +-------OO-------------------------------
> +----------------------------------------
> +]]
> +
> +local function check_life(thisgen, w, h)
> +  local expected_cells = ARRAY2D(w, h)
> +  for y = 1, h do
> +    for x = 1, w do
> +      expected_cells[y][x] = false
> +    end
> +  end
> +  local alive_cells = {
> +    {3, 3}, {3, 4}, {3, 31},
> +    {4, 2}, {4, 3}, {4, 30}, {4, 32},
> +    {5, 4}, {5, 31},
> +    {13, 4},
> +    {14, 3}, {14, 5},
> +    {15, 3}, {15, 5},
> +    {16, 4},
> +    {18, 8}, {18, 9},
> +    {19, 8}, {19, 9},
> +  }
> +  for _, cell in ipairs(alive_cells) do
> +    local y, x = cell[1], cell[2]
> +    expected_cells[y][x] = true
> +  end
> +  for y = 1, h do
> +    for x = 1, w do
> +      assert(thisgen[y][x] > 0 == expected_cells[y][x],
> +             ('Incorrect value for cell (%d, %d)'):format(x, y))
> +    end
> +  end
> +  return true
> +end
> +
> +local stdout = io.output()
> +
> +bench:add({
> +  name = 'life',
> +  setup = function()
> +    io.output('/dev/null')
> +  end,
> +  payload = function()
> +    return LIFE(40, 20)
> +  end,
> +  teardown = function()
> +    io.output(stdout)
> +  end,
> +  checker = function(res)
> +    return check_life(res, 40, 20)
> +  end,
> +  items = 2000 * 40 * 20,
> +})
> +
> +bench:run_and_report()
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