diff options
author | Stefan Metzmacher <metze@samba.org> | 2012-11-02 13:56:53 +0100 |
---|---|---|
committer | Volker Lendecke <vl@samba.org> | 2012-11-05 17:13:40 +0100 |
commit | 719595b6f7f8745f2608dddb2b86476b9cc2f598 (patch) | |
tree | 7c76ef4dffbf6ff437a9cdbee3e75171ed308c66 | |
parent | e42889f83f261e2ac34014649476fae638a6e1f2 (diff) | |
download | samba-719595b6f7f8745f2608dddb2b86476b9cc2f598.tar.gz samba-719595b6f7f8745f2608dddb2b86476b9cc2f598.tar.bz2 samba-719595b6f7f8745f2608dddb2b86476b9cc2f598.zip |
lib/tsocket: optimize syscalls in tstream_readv_pdu_send()
Once we've got the first part of a pdu we try to optimize
readv calls for the rest of the pdu.
Signed-off-by: Stefan Metzmacher <metze@samba.org>
-rw-r--r-- | lib/tsocket/tsocket_helpers.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/lib/tsocket/tsocket_helpers.c b/lib/tsocket/tsocket_helpers.c index 1b92b9f82c..49c6840f87 100644 --- a/lib/tsocket/tsocket_helpers.c +++ b/lib/tsocket/tsocket_helpers.c @@ -215,6 +215,20 @@ static void tstream_readv_pdu_ask_for_next_vector(struct tevent_req *req) size_t to_read = 0; size_t i; struct tevent_req *subreq; + bool optimize = false; + bool save_optimize = false; + + if (state->count > 0) { + /* + * This is not the first time we asked for a vector, + * which means parts of the pdu already arrived. + * + * In this case it make sense to enable + * a syscall/performance optimization if the + * low level tstream implementation supports it. + */ + optimize = true; + } TALLOC_FREE(state->vector); state->count = 0; @@ -258,11 +272,26 @@ static void tstream_readv_pdu_ask_for_next_vector(struct tevent_req *req) return; } + if (optimize) { + /* + * If the low level stream is a bsd socket + * we will get syscall optimization. + * + * If it is not a bsd socket + * tstream_bsd_optimize_readv() just returns. + */ + save_optimize = tstream_bsd_optimize_readv(state->caller.stream, + true); + } subreq = tstream_readv_send(state, state->caller.ev, state->caller.stream, state->vector, state->count); + if (optimize) { + tstream_bsd_optimize_readv(state->caller.stream, + save_optimize); + } if (tevent_req_nomem(subreq, req)) { return; } |