DEV: improve diagnostics on mem leak checker

This adds mwrap logging to each iteration so we can see how much
leaks per iteration and where it is coming from
This commit is contained in:
Sam Saffron 2019-10-03 21:57:36 +10:00
parent df02930c67
commit 1d5c2b36f6
1 changed files with 67 additions and 0 deletions

View File

@ -95,6 +95,69 @@ if $jemalloc
end
end
def render_table(array)
buffer = +""
width = array[0].map { |k| k.to_s.length }
cols = array[0].length
array.each do |row|
row.each_with_index do |val, i|
width[i] = [width[i].to_i, val.to_s.length].max
end
end
array[0].each_with_index do |col, i|
buffer << col.to_s.ljust(width[i], ' ')
if i == cols - 1
buffer << "\n"
else
buffer << ' | '
end
end
buffer << ("-" * (width.sum + width.length))
buffer << "\n"
array.drop(1).each do |row|
row.each_with_index do |val, i|
buffer << val.to_s.ljust(width[i], ' ')
if i == cols - 1
buffer << "\n"
else
buffer << ' | '
end
end
end
buffer
end
def mwrap_log
report = +""
Mwrap.quiet do
report << "Allocated bytes: #{Mwrap.total_bytes_allocated} Freed bytes: #{Mwrap.total_bytes_freed}\n"
report << "\n"
table = []
Mwrap.each(200000) do |loc, total, allocations, frees, age_sum, max_life|
table << [total, allocations - frees, frees == 0 ? -1 : (age_sum / frees.to_f).round(2), max_life, loc]
end
table.sort! { |a, b| b[1] <=> a[1] }
table = table[0..50]
table.prepend(["total", "delta", "mean_life", "max_life", "location"])
report << render_table(table)
end
report
end
Mwrap.clear
if $mwrap
$mwrap_baseline = Mwrap.total_bytes_allocated - Mwrap.total_bytes_freed
end
@ -105,4 +168,8 @@ $biggest_array_length = biggest_klass(Array).length
100000.times do
iter
if $mwrap
puts mwrap_log
GC.start(full_mark: true, immediate_sweep: true)
end
end