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add prefetching

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This commit is contained in:
Joe Thornber 2015-08-24 11:24:55 +01:00
parent c8d3ce6af5
commit ac4104d063
1 changed files with 5 additions and 0 deletions
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5
thin-provisioning/thin_show_duplicates.cc
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@ -136,6 +136,8 @@ namespace {
cache_(new block_cache(fd_, block_size / 512, nr_blocks_, cache_mem)),
current_index_(0) {
load(0);
for (block_address i = 1; i < min(cache_blocks_, nr_blocks_); i++)
cache_->prefetch(i);
}
virtual void rewind() {
@ -165,6 +167,9 @@ namespace {
current_chunk_.mem_.clear();
current_chunk_.mem_.push_back(mem(current_block_.get_data(),
current_block_.get_data() + block_size_));
if (current_index_ + cache_blocks_ < nr_blocks_)
cache_->prefetch(current_index_ + cache_blocks_);
}
block_address block_size_;