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Issue #17835: Fix test_io when the default OS pipe buffer size is larger than one million bytes.

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Antoine Pitrou 2013-04-24 23:31:38 +02:00
parent 6ae466732c
commit e1a1674e1e
3 changed files with 11 additions and 6 deletions
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10
Lib/test/support.py
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@ -573,10 +573,12 @@ def _is_ipv6_enabled():
IPV6_ENABLED = _is_ipv6_enabled()
# A constant likely larger than the underlying OS pipe buffer size.
# Windows limit seems to be around 512B, and many Unix kernels have a 64K pipe
# buffer size or 16*PAGE_SIZE: take a few megs to be sure. This
PIPE_MAX_SIZE = 3 * 1000 * 1000
# A constant likely larger than the underlying OS pipe buffer size, to
# make writes blocking.
# Windows limit seems to be around 512 B, and many Unix kernels have a
# 64 KiB pipe buffer size or 16 * PAGE_SIZE: take a few megs to be sure.
# (see issue #17835 for a discussion of this number).
PIPE_MAX_SIZE = 4 *1024 * 1024 + 1
# decorator for skipping tests on non-IEEE 754 platforms