mirror of
https://github.com/mruby/mruby
synced 2026-06-08 16:11:16 +00:00
Yukihiro "Matz" Matsumoto
4b866a84da
GC.step_limit caps the per-step work in incremental GC, enabling more predictable pause times for real-time use. GC.malloc_threshold triggers GC based on allocation bytes, addressing memory pressure from large buffers. Both default to 0 (disabled), preserving existing behavior. Co-authored-by: Claude <noreply@anthropic.com>
96 lines
2.1 KiB
Ruby
96 lines
2.1 KiB
Ruby
# Not ISO specified
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assert('GC.enable') do
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assert_false GC.disable
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assert_true GC.enable
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assert_false GC.enable
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end
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assert('GC.disable') do
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begin
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assert_false GC.disable
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assert_true GC.disable
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ensure
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GC.enable
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end
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end
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assert('GC.interval_ratio=') do
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origin = GC.interval_ratio
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begin
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assert_equal 150, (GC.interval_ratio = 150)
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ensure
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GC.interval_ratio = origin
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end
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end
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assert('GC.step_ratio=') do
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origin = GC.step_ratio
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begin
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assert_equal 150, (GC.step_ratio = 150)
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ensure
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GC.step_ratio = origin
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end
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end
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assert('GC.step_limit=') do
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origin = GC.step_limit
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begin
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assert_equal 0, origin # default: unlimited
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assert_equal 512, (GC.step_limit = 512)
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assert_equal 512, GC.step_limit
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assert_equal 0, (GC.step_limit = 0) # back to unlimited
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ensure
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GC.step_limit = origin
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end
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end
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assert('GC.step_limit - GC completes with small limit') do
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origin = GC.step_limit
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begin
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GC.step_limit = 64
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# GC should still complete even with a small step limit
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GC.start
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assert_true GC.stat[:live] > 0
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ensure
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GC.step_limit = origin
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end
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end
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assert('GC.malloc_threshold=') do
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origin = GC.malloc_threshold
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begin
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assert_equal 0, origin # default: disabled
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assert_equal 65536, (GC.malloc_threshold = 65536)
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assert_equal 65536, GC.malloc_threshold
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assert_equal 0, (GC.malloc_threshold = 0) # back to disabled
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ensure
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GC.malloc_threshold = origin
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end
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end
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assert('GC.malloc_threshold - triggers GC on large allocations') do
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origin = GC.malloc_threshold
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begin
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GC.malloc_threshold = 4096
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GC.start # reset malloc_increase
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# allocate large strings to exceed threshold
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100.times { "x" * 1024 }
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stat = GC.stat
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assert_true stat[:malloc_increase] >= 0
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ensure
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GC.malloc_threshold = origin
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end
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end
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assert('GC.generational_mode=') do
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origin = GC.generational_mode
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begin
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assert_false (GC.generational_mode = false)
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assert_true (GC.generational_mode = true)
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assert_true (GC.generational_mode = true)
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ensure
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GC.generational_mode = origin
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end
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end
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