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os/bluestore: add perf counters for cache size

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Onodes, buffers, buffer bytes.

Signed-off-by: Sage Weil <sage@redhat.com>
This commit is contained in:
Sage Weil 2016-10-03 11:58:20 -04:00
parent 6098761000
commit 33e26d021d
2 changed files with 44 additions and 0 deletions
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21
src/os/bluestore/BlueStore.cc
View File

@ -2435,10 +2435,16 @@ void BlueStore::_init_logger()
b.add_u64(l_bluestore_compressed_original, "bluestore_compressed_original",
"Sum for original bytes that were compressed");
b.add_u64(l_bluestore_onodes, "bluestore_onodes",
"Number of onodes in cache");
b.add_u64(l_bluestore_onode_hits, "bluestore_onode_hits",
"Sum for onode-lookups hit in the cache");
b.add_u64(l_bluestore_onode_misses, "bluestore_onode_misses",
"Sum for onode-lookups missed in the cache");
b.add_u64(l_bluestore_buffers, "bluestore_buffers",
"Number of buffers in cache");
b.add_u64(l_bluestore_buffer_bytes, "bluestore_buffer_bytes",
"Number of buffer bytes in cache");
b.add_u64(l_bluestore_buffer_hit_bytes, "bluestore_buffer_hit_bytes",
"Sum for bytes of read hit in the cache");
b.add_u64(l_bluestore_buffer_miss_bytes, "bluestore_buffer_miss_bytes",
@ -4516,6 +4522,19 @@ void BlueStore::_reap_collections()
}
}
void BlueStore::_update_cache_logger()
{
uint64_t num_onodes = 0;
uint64_t num_buffers = 0;
uint64_t num_buffer_bytes = 0;
for (auto c : cache_shards) {
c->add_stats(&num_onodes, &num_buffers, &num_buffer_bytes);
}
logger->set(l_bluestore_onodes, num_onodes);
logger->set(l_bluestore_buffers, num_buffers);
logger->set(l_bluestore_buffer_bytes, num_buffer_bytes);
}
// ---------------
// read operations
@ -6348,6 +6367,8 @@ void BlueStore::_kv_sync_thread()
// this is as good a place as any ...
_reap_collections();
_update_cache_logger();
if (bluefs) {
if (!bluefs_gift_extents.empty()) {
_commit_bluefs_freespace(bluefs_gift_extents);

23
src/os/bluestore/BlueStore.h
View File

@ -72,8 +72,11 @@ enum {
l_bluestore_compressed,
l_bluestore_compressed_allocated,
l_bluestore_compressed_original,
l_bluestore_onodes,
l_bluestore_onode_hits,
l_bluestore_onode_misses,
l_bluestore_buffers,
l_bluestore_buffer_bytes,
l_bluestore_buffer_hit_bytes,
l_bluestore_buffer_miss_bytes,
l_bluestore_write_big,
@ -714,6 +717,9 @@ public:
virtual void trim(uint64_t onode_max, uint64_t buffer_max) = 0;
virtual void add_stats(uint64_t *onodes, uint64_t *buffers,
uint64_t *bytes) = 0;
#ifdef DEBUG_CACHE
virtual void _audit(const char *s) = 0;
#else
@ -785,6 +791,14 @@ public:
void trim(uint64_t onode_max, uint64_t buffer_max) override;
void add_stats(uint64_t *onodes, uint64_t *buffers,
uint64_t *bytes) override {
std::lock_guard<std::recursive_mutex> l(lock);
*onodes += onode_lru.size();
*buffers += buffer_lru.size();
*bytes += buffer_size;
}
#ifdef DEBUG_CACHE
void _audit(const char *s) override;
#endif
@ -860,6 +874,14 @@ public:
void trim(uint64_t onode_max, uint64_t buffer_max) override;
void add_stats(uint64_t *onodes, uint64_t *buffers,
uint64_t *bytes) override {
std::lock_guard<std::recursive_mutex> l(lock);
*onodes += onode_lru.size();
*buffers += buffer_hot.size() + buffer_warm_in.size();
*bytes += buffer_bytes;
}
#ifdef DEBUG_CACHE
void _audit(const char *s) override;
#endif
@ -1416,6 +1438,7 @@ private:
CollectionRef _get_collection(const coll_t& cid);
void _queue_reap_collection(CollectionRef& c);
void _reap_collections();
void _update_cache_logger();
void _assign_nid(TransContext *txc, OnodeRef o);
uint64_t _assign_blobid(TransContext *txc);