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volatile cache tuning

This commit is contained in:
Arvid Norberg 2010-02-01 01:11:10 +00:00
parent fc310ffde1
commit c1b8124d20
1 changed files with 16 additions and 10 deletions
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26
src/disk_io_thread.cpp
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@ -496,16 +496,22 @@ namespace libtorrent
while (num_blocks)
{
while (i->blocks[start].buf == 0 && start <= end) ++start;
if (start > end) break;
free_buffer(i->blocks[start].buf);
i->blocks[start].buf = 0;
++blocks;
--const_cast<cached_piece_entry&>(*i).num_blocks;
--m_cache_stats.cache_size;
--m_cache_stats.read_cache_size;
--num_blocks;
if (!num_blocks) break;
// if we have a volatile read cache, only clear
// from the end, since we're already clearing
// from the start as blocks are read
if (!m_settings.volatile_read_cache)
{
while (i->blocks[start].buf == 0 && start <= end) ++start;
if (start > end) break;
free_buffer(i->blocks[start].buf);
i->blocks[start].buf = 0;
++blocks;
--const_cast<cached_piece_entry&>(*i).num_blocks;
--m_cache_stats.cache_size;
--m_cache_stats.read_cache_size;
--num_blocks;
if (!num_blocks) break;
}
while (i->blocks[end].buf == 0 && start <= end) --end;
if (start > end) break;