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| author | Noah Watkins <noahwatkins@gmail.com> | 2013-07-20 18:41:39 -0700 |
|---|---|---|
| committer | Noah Watkins <noahwatkins@gmail.com> | 2013-09-17 10:16:18 -0700 |
| commit | 4670b0f14f009d1f5c19f5c3bce3bd5b9127e14b (patch) | |
| tree | cfbd380525985f01b9a347acaa54be03396ab17d | |
| parent | b5c62eabd1de86dce7a23b3223070ebc0e70254d (diff) | |
| download | ceph-4670b0f14f009d1f5c19f5c3bce3bd5b9127e14b.tar.gz | |
wbthrottle: use posix_fadvise if available
Only adding information about data usage. This won't effect correctness;
finding analagous techniques on other platforms woudld be useful for
performance.
Signed-off-by: Noah Watkins <noahwatkins@gmail.com>
| -rw-r--r-- | configure.ac | 1 | ||||
| -rw-r--r-- | src/os/WBThrottle.cc | 4 |
2 files changed, 5 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index b80cafe6fb3..1eba33d5428 100644 --- a/configure.ac +++ b/configure.ac @@ -555,6 +555,7 @@ AC_CHECK_HEADERS([linux/fs.h]) AC_CHECK_HEADERS([sys/disk.h]) AC_CHECK_HEADERS([sys/prctl.h]) AC_CHECK_FUNCS([prctl]) +AC_CHECK_FUNCS([posix_fadvise]) # Checks for typedefs, structures, and compiler characteristics. #AC_HEADER_STDBOOL diff --git a/src/os/WBThrottle.cc b/src/os/WBThrottle.cc index 8479b3c878d..ba95b9b4284 100644 --- a/src/os/WBThrottle.cc +++ b/src/os/WBThrottle.cc @@ -1,6 +1,8 @@ // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- // vim: ts=8 sw=2 smarttab +#include <acconfig.h> + #include "os/WBThrottle.h" #include "common/perf_counters.h" @@ -146,8 +148,10 @@ void *WBThrottle::entry() clearing = wb.get<0>(); lock.Unlock(); ::fdatasync(**wb.get<1>()); +#ifdef HAVE_POSIX_FADVISE if (wb.get<2>().nocache) posix_fadvise(**wb.get<1>(), 0, 0, POSIX_FADV_DONTNEED); +#endif lock.Lock(); clearing = hobject_t(); cur_ios -= wb.get<2>().ios; |