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always cache writes

This commit is contained in:
Steven Siloti 2016-03-12 13:16:39 -08:00
parent 6e8db41dd2
commit 826bbe35ee
1 changed files with 15 additions and 27 deletions
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42
src/disk_io_thread.cpp
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@ -1458,10 +1458,6 @@ namespace libtorrent
INVARIANT_CHECK;
TORRENT_ASSERT(j->d.io.buffer_size <= m_disk_cache.block_size());
// should we put this write job in the cache?
// if we don't use the cache we shouldn't.
if (j->flags & disk_io_job::use_disk_cache)
{
mutex::scoped_lock l(m_cache_mutex);
cached_piece_entry* pe = m_disk_cache.find_piece(j);
@ -1512,7 +1508,6 @@ namespace libtorrent
return defer_handler;
}
}
// ok, we should just perform this job right now.
return do_uncached_write(j);
@ -1575,9 +1570,6 @@ namespace libtorrent
{
TORRENT_ASSERT(j->action == disk_io_job::read);
if (m_settings.get_bool(settings_pack::use_read_cache)
&& m_settings.get_int(settings_pack::cache_size) != 0)
{
int ret = m_disk_cache.try_read(j);
if (ret >= 0)
{
@ -1605,7 +1597,19 @@ namespace libtorrent
return 2;
}
if (!m_settings.get_bool(settings_pack::use_read_cache)
|| m_settings.get_int(settings_pack::cache_size) == 0)
{
// if the read cache is disabled then we can skip going through the cache
// but only if there is no existing piece entry. Otherwise there may be a
// partial hit on one-or-more dirty buffers so we must use the cache
// to avoid reading bogus data from storage
if (m_disk_cache.find_piece(j) == NULL)
return 1;
}
cached_piece_entry* pe = m_disk_cache.allocate_piece(j, cached_piece_entry::read_lru1);
if (pe == NULL)
{
j->ret = -1;
@ -1625,7 +1629,7 @@ namespace libtorrent
pe->piece_log.push_back(piece_log_t(piece_log_t::set_outstanding_jobs));
#endif
pe->outstanding_read = 1;
}
return 1;
}
@ -1689,11 +1693,8 @@ namespace libtorrent
TORRENT_ASSERT(m_disk_cache.is_disk_buffer(j->buffer.disk_block));
l_.unlock();
#endif
if (m_settings.get_int(settings_pack::cache_size) != 0
&& m_settings.get_bool(settings_pack::use_write_cache))
{
TORRENT_ASSERT((r.start % m_disk_cache.block_size()) == 0);
j->flags |= disk_io_job::use_disk_cache;
if (storage->is_blocked(j))
{
@ -1734,7 +1735,6 @@ namespace libtorrent
// issued a flush job or not), we're done.
if (dpe) return;
l.unlock();
}
add_job(j);
buffer.release();
@ -1782,13 +1782,6 @@ namespace libtorrent
return;
}
l.unlock();
if (m_settings.get_bool(settings_pack::use_read_cache)
&& m_settings.get_int(settings_pack::cache_size) != 0)
{
j->flags |= disk_io_job::use_disk_cache;
}
add_job(j);
}
@ -2291,9 +2284,6 @@ namespace libtorrent
{
INVARIANT_CHECK;
if ((j->flags & disk_io_job::use_disk_cache) == 0)
return do_uncached_hash(j);
int const piece_size = j->storage->files()->piece_size(j->piece);
int const file_flags = file_flags_for_job(j);
@ -3462,9 +3452,7 @@ namespace libtorrent
{
disk_io_job* j = new_jobs.pop_front();
if (j->action == disk_io_job::read
&& m_settings.get_bool(settings_pack::use_read_cache)
&& m_settings.get_int(settings_pack::cache_size) != 0)
if (j->action == disk_io_job::read)
{
int state = prep_read_job_impl(j, false);
switch (state)