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Problem: enormous memory increase due to zero copy decoding

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The zero copy decoding strategy implemented for 4.2.0 can lead to a large
increase of main memory usage in some cases (I have seen one program go up to
40G from 10G after upgrading from 4.1.4). This commit adds a new option to
contexts, called ZMQ_ZERO_COPY_RECV, which allows one to switch to the old
decoding strategy.
This commit is contained in:
Stefan Kaes
2018-03-05 13:19:20 +01:00
parent d54633add1
commit fcbd2a5710
16 changed files with 112 additions and 17 deletions
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3
src/v2_decoder.hpp
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@@ -44,7 +44,7 @@ class v2_decoder_t :
public decoder_base_t<v2_decoder_t, shared_message_memory_allocator>
{
public:
v2_decoder_t (size_t bufsize_, int64_t maxmsgsize_);
v2_decoder_t (size_t bufsize_, int64_t maxmsgsize_, bool zero_copy_);
virtual ~v2_decoder_t ();
// i_decoder interface.
@@ -62,6 +62,7 @@ class v2_decoder_t :
unsigned char msg_flags;
msg_t in_progress;
const bool zero_copy;
const int64_t maxmsgsize;
v2_decoder_t (const v2_decoder_t &);