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46846433a0
Do not update shm_mq's mq_bytes_written until we have written an amount of data greater than 1/4th of the ring size, unless the caller of shm_mq_send(v) requests a flush at the end of the message. This reduces the number of calls to SetLatch(), and also the number of CPU cache misses, considerably, and thus makes shm_mq significantly faster. Dilip Kumar, reviewed by Zhihong Yu and Tomas Vondra. Some minor cosmetic changes by me. Discussion: http://postgr.es/m/CAFiTN-tVXqn_OG7tHNeSkBbN+iiCZTiQ83uakax43y1sQb2OBA@mail.gmail.com |
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| .. | ||
| .gitignore | ||
| backendid.h | ||
| barrier.h | ||
| block.h | ||
| buf_internals.h | ||
| buf.h | ||
| buffile.h | ||
| bufmgr.h | ||
| bufpage.h | ||
| checksum_impl.h | ||
| checksum.h | ||
| condition_variable.h | ||
| copydir.h | ||
| dsm_impl.h | ||
| dsm.h | ||
| fd.h | ||
| fileset.h | ||
| freespace.h | ||
| fsm_internals.h | ||
| indexfsm.h | ||
| ipc.h | ||
| item.h | ||
| itemid.h | ||
| itemptr.h | ||
| large_object.h | ||
| latch.h | ||
| lmgr.h | ||
| lock.h | ||
| lockdefs.h | ||
| lwlock.h | ||
| md.h | ||
| off.h | ||
| pg_sema.h | ||
| pg_shmem.h | ||
| pmsignal.h | ||
| predicate_internals.h | ||
| predicate.h | ||
| proc.h | ||
| procarray.h | ||
| proclist_types.h | ||
| proclist.h | ||
| procsignal.h | ||
| reinit.h | ||
| relfilenode.h | ||
| s_lock.h | ||
| sharedfileset.h | ||
| shm_mq.h | ||
| shm_toc.h | ||
| shmem.h | ||
| sinval.h | ||
| sinvaladt.h | ||
| smgr.h | ||
| spin.h | ||
| standby.h | ||
| standbydefs.h | ||
| sync.h | ||