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author | Patrick Simianer <p@simianer.de> | 2014-10-13 19:03:48 +0100 |
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committer | Patrick Simianer <p@simianer.de> | 2014-10-13 19:03:48 +0100 |
commit | cb9fb7088dde35881516c088db402abe747d49fa (patch) | |
tree | a91e4935a7941f1b261f76d88ab41fa3078a1891 /klm/util/parallel_read.hh | |
parent | 0a00e57e921c8eca8e02364db7d2e6607bfdcebc (diff) | |
parent | b1ed81ef3216b212295afa76c5d20a56fb647204 (diff) |
Merge remote-tracking branch 'upstream/master'
Diffstat (limited to 'klm/util/parallel_read.hh')
-rw-r--r-- | klm/util/parallel_read.hh | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/klm/util/parallel_read.hh b/klm/util/parallel_read.hh new file mode 100644 index 00000000..1e96e790 --- /dev/null +++ b/klm/util/parallel_read.hh @@ -0,0 +1,16 @@ +#ifndef UTIL_PARALLEL_READ__ +#define UTIL_PARALLEL_READ__ + +/* Read pieces of a file in parallel. This has a very specific use case: + * reading files from Lustre is CPU bound so multiple threads actually + * increases throughput. Speed matters when an LM takes a terabyte. + */ + +#include <cstddef> +#include <stdint.h> + +namespace util { +void ParallelRead(int fd, void *to, std::size_t amount, uint64_t offset); +} // namespace util + +#endif // UTIL_PARALLEL_READ__ |