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always keep at least 2 async hash jobs outstanding when rechecking torrents (to keep the bandwidth delay product full)

This commit is contained in:
arvidn 2016-03-06 16:31:18 -05:00
parent 834d04efdc
commit 67774d660d
2 changed files with 10 additions and 7 deletions
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5
src/torrent.cpp
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@ -2682,7 +2682,10 @@ namespace libtorrent
int num_outstanding = settings().get_int(settings_pack::checking_mem_usage) * block_size()
/ m_torrent_file->piece_length();
if (num_outstanding <= 0) num_outstanding = 1;
// if we only keep a single read operation in-flight at a time, we suffer
// significant performance degradation. Always keep at least two jobs
// outstanding
if (num_outstanding < 2) num_outstanding = 2;
// we might already have some outstanding jobs, if we were paused and
// resumed quickly, before the outstanding jobs completed