conky-config/drawing/ReadWrite.lua

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local M = {}
local Util = require 'Util'
local Common = require 'Common'
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local __tonumber = tonumber
local __string_match = string.match
local _PLOT_SEC_BREAK_ = 20
local _PLOT_HEIGHT_ = 56
local BLOCK_SIZE_BYTES = 512
local STAT_FILE = '/sys/block/sda/stat'
-- fields 3 and 7 (sectors read and written)
local RW_REGEX = '%s+%d+%s+%d+%s+(%d+)%s+%d+%s+%d+%s+%d+%s+(%d+)'
local read_stat_file = function()
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
end
local update_stat = function(cr, stat, byte_cnt, update_frequency)
local delta_bytes = byte_cnt - stat.prev_byte_cnt
stat.prev_byte_cnt = byte_cnt
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local text_value = '0.00 B/s'
local plot_value = 0
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if delta_bytes > 0 then
local bps = delta_bytes * update_frequency
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local unit, value = Util.convert_data_val(bps)
text_value = Util.precision_round_to_string(value, 3)..' '..unit..'B/s'
plot_value = bps
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end
Common.annotated_scale_plot_set(stat, cr, text_value, plot_value)
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end
local io_label_function = function(bytes)
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local new_unit, new_value = Util.convert_data_val(bytes)
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local precision = 0
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if new_value < 10 then precision = 1 end
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return Util.round_to_string(new_value, precision)..' '..new_unit..'B/s'
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end
local header = Common.Header(
_G_INIT_DATA_.CENTER_LEFT_X,
_G_INIT_DATA_.TOP_Y,
_G_INIT_DATA_.SECTION_WIDTH,
'INPUT / OUTPUT'
)
local reads = Common.initLabeledScalePlot(
_G_INIT_DATA_.CENTER_LEFT_X,
header.bottom_y,
_G_INIT_DATA_.SECTION_WIDTH,
_PLOT_HEIGHT_,
io_label_function,
_PLOT_SEC_BREAK_,
'Reads'
)
local writes = Common.initLabeledScalePlot(
_G_INIT_DATA_.CENTER_LEFT_X,
header.bottom_y + _PLOT_HEIGHT_ + _PLOT_SEC_BREAK_ * 2,
_G_INIT_DATA_.SECTION_WIDTH,
_PLOT_HEIGHT_,
io_label_function,
_PLOT_SEC_BREAK_,
'Writes'
)
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_PLOT_SEC_BREAK_ = nil
_PLOT_HEIGHT_ = nil
reads.byte_cnt = 0
writes.byte_cnt = 0
reads.prev_byte_cnt, writes.prev_byte_cnt = read_stat_file()
local update = function(cr, update_frequency)
local read_byte_cnt, write_byte_cnt = read_stat_file()
update_stat(cr, reads, read_byte_cnt, update_frequency)
update_stat(cr, writes, write_byte_cnt, update_frequency)
end
local draw_static = function(cr)
Common.drawHeader(cr, header)
Common.annotated_scale_plot_draw_static(reads, cr)
Common.annotated_scale_plot_draw_static(writes, cr)
end
local draw_dynamic = function(cr, update_frequency)
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update(cr, update_frequency)
Common.annotated_scale_plot_draw_dynamic(reads, cr)
Common.annotated_scale_plot_draw_dynamic(writes, cr)
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end
M.draw_static = draw_static
M.draw_dynamic = draw_dynamic
return M