108 lines
2.7 KiB
Lua
108 lines
2.7 KiB
Lua
local M = {}
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local Util = require 'Util'
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local Common = require 'Common'
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local __tonumber = tonumber
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local __string_match = string.match
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local __math_floor = math.floor
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local _PLOT_SEC_BREAK_ = 20
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local _PLOT_HEIGHT_ = 56
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local BLOCK_SIZE_BYTES = 512
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local STAT_FILE = '/sys/block/sda/stat'
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-- fields 3 and 7 (sectors read and written)
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local RW_REGEX = '%s+%d+%s+%d+%s+(%d+)%s+%d+%s+%d+%s+%d+%s+(%d+)'
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local read_stat_file = function()
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local bytes_r, bytes_w = __string_match(Util.read_file(STAT_FILE), RW_REGEX)
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return __tonumber(bytes_r) * BLOCK_SIZE_BYTES, __tonumber(bytes_w) * BLOCK_SIZE_BYTES
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end
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local update_stat = function(cr, stat, byte_cnt, update_frequency)
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local delta_bytes = byte_cnt - stat.prev_byte_cnt
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stat.prev_byte_cnt = byte_cnt
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local plot_value = 0
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if delta_bytes > 0 then
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local bps = delta_bytes * update_frequency
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plot_value = bps
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end
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Common.annotated_scale_plot_set(stat, cr, plot_value)
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end
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local io_label_function = function(bytes)
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local new_unit, new_value = Util.convert_data_val(bytes)
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return __math_floor(new_value)..' '..new_unit..'B/s'
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end
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local format_value_function = function(bps)
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local unit, value = Util.convert_data_val(bps)
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return Util.precision_round_to_string(value, 3)..' '..unit..'B/s'
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end
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local header = Common.Header(
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_G_INIT_DATA_.CENTER_LEFT_X,
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_G_INIT_DATA_.TOP_Y,
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_G_INIT_DATA_.SECTION_WIDTH,
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'INPUT / OUTPUT'
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)
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local reads = Common.initLabeledScalePlot(
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_G_INIT_DATA_.CENTER_LEFT_X,
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header.bottom_y,
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_G_INIT_DATA_.SECTION_WIDTH,
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_PLOT_HEIGHT_,
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format_value_function,
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io_label_function,
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_PLOT_SEC_BREAK_,
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'Reads',
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2
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)
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local writes = Common.initLabeledScalePlot(
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_G_INIT_DATA_.CENTER_LEFT_X,
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header.bottom_y + _PLOT_HEIGHT_ + _PLOT_SEC_BREAK_ * 2,
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_G_INIT_DATA_.SECTION_WIDTH,
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_PLOT_HEIGHT_,
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format_value_function,
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io_label_function,
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_PLOT_SEC_BREAK_,
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'Writes',
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2
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)
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_PLOT_SEC_BREAK_ = nil
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_PLOT_HEIGHT_ = nil
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reads.byte_cnt = 0
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writes.byte_cnt = 0
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reads.prev_byte_cnt, writes.prev_byte_cnt = read_stat_file()
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local update = function(cr, update_frequency)
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local read_byte_cnt, write_byte_cnt = read_stat_file()
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update_stat(cr, reads, read_byte_cnt, update_frequency)
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update_stat(cr, writes, write_byte_cnt, update_frequency)
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end
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local draw_static = function(cr)
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Common.drawHeader(cr, header)
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Common.annotated_scale_plot_draw_static(reads, cr)
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Common.annotated_scale_plot_draw_static(writes, cr)
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end
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local draw_dynamic = function(cr, update_frequency)
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update(cr, update_frequency)
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Common.annotated_scale_plot_draw_dynamic(reads, cr)
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Common.annotated_scale_plot_draw_dynamic(writes, cr)
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end
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M.draw_static = draw_static
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M.draw_dynamic = draw_dynamic
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return M
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