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authorRaghavendra G <raghavendra@gluster.com>2010-04-05 13:36:07 +0000
committerAnand V. Avati <avati@dev.gluster.com>2010-04-08 03:08:04 -0700
commit33101bd66614908efafc91ff2950ef3e34b76a3b (patch)
tree0e98270bc4f19d03c9dbce6b09f5a0de502a5b49 /xlators/performance/io-cache
parent9c2bc1bc61af888192bde18170b113b4f6f8b4ca (diff)
performance/io-cache: make use of nano second resolution of mtime during cache validation.
Signed-off-by: Raghavendra G <raghavendra@gluster.com> Signed-off-by: Anand V. Avati <avati@dev.gluster.com> BUG: 801 (Direct io-mode support and related changes in caching translators.) URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=801
Diffstat (limited to 'xlators/performance/io-cache')
-rw-r--r--xlators/performance/io-cache/src/io-cache.c6
-rw-r--r--xlators/performance/io-cache/src/io-cache.h6
-rw-r--r--xlators/performance/io-cache/src/page.c7
3 files changed, 14 insertions, 5 deletions
diff --git a/xlators/performance/io-cache/src/io-cache.c b/xlators/performance/io-cache/src/io-cache.c
index 2e523b15b..9bf20be5b 100644
--- a/xlators/performance/io-cache/src/io-cache.c
+++ b/xlators/performance/io-cache/src/io-cache.c
@@ -220,6 +220,7 @@ ioc_lookup_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
{
if (ioc_inode->cache.mtime == 0) {
ioc_inode->cache.mtime = stbuf->ia_mtime;
+ ioc_inode->cache.mtime_nsec = stbuf->ia_mtime_nsec;
}
ioc_inode->ia_size = stbuf->ia_size;
@@ -344,8 +345,10 @@ ioc_cache_validate_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
ioc_inode_lock (ioc_inode);
{
destroy_size = __ioc_inode_flush (ioc_inode);
- if (op_ret >= 0)
+ if (op_ret >= 0) {
ioc_inode->cache.mtime = stbuf->ia_mtime;
+ ioc_inode->cache.mtime_nsec = stbuf->ia_mtime_nsec;
+ }
}
ioc_inode_unlock (ioc_inode);
local_stbuf = NULL;
@@ -606,6 +609,7 @@ ioc_create_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
ioc_inode_lock (ioc_inode);
{
ioc_inode->cache.mtime = buf->ia_mtime;
+ ioc_inode->cache.mtime_nsec = buf->ia_mtime_nsec;
ioc_inode->ia_size = buf->ia_size;
if ((table->min_file_size > ioc_inode->ia_size)
diff --git a/xlators/performance/io-cache/src/io-cache.h b/xlators/performance/io-cache/src/io-cache.h
index 15a2828bb..0b164efe4 100644
--- a/xlators/performance/io-cache/src/io-cache.h
+++ b/xlators/performance/io-cache/src/io-cache.h
@@ -131,8 +131,10 @@ struct ioc_cache {
rbthash_table_t *page_table;
struct list_head page_lru;
time_t mtime; /*
- * mtime of the server file when last
- * cached
+ * seconds component of file mtime
+ */
+ time_t mtime_nsec; /*
+ * nanosecond component of file mtime
*/
struct timeval tv; /*
* time-stamp at last re-validate
diff --git a/xlators/performance/io-cache/src/page.c b/xlators/performance/io-cache/src/page.c
index c4cc8f060..28be2b358 100644
--- a/xlators/performance/io-cache/src/page.c
+++ b/xlators/performance/io-cache/src/page.c
@@ -292,7 +292,8 @@ ioc_cache_still_valid (ioc_inode_t *ioc_inode, struct iatt *stbuf)
cache_still_valid = 0;
#else
- if (!stbuf || (stbuf->ia_mtime != ioc_inode->cache.mtime))
+ if (!stbuf || (stbuf->ia_mtime != ioc_inode->cache.mtime)
+ || (stbuf->ia_mtime_nsec != ioc_inode->cache.mtime_nsec))
cache_still_valid = 0;
#endif
@@ -366,8 +367,10 @@ ioc_fault_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
destroy_size = __ioc_inode_flush (ioc_inode);
}
- if ((op_ret >= 0) && !zero_filled)
+ if ((op_ret >= 0) && !zero_filled) {
ioc_inode->cache.mtime = stbuf->ia_mtime;
+ ioc_inode->cache.mtime_nsec = stbuf->ia_mtime_nsec;
+ }
gettimeofday (&ioc_inode->cache.tv, NULL);