gian/ceph-mirror
1
0
Fork 0
mirror of https://github.com/ceph/ceph synced 2026-08-02 07:03:18 +00:00
Code Issues Actions 1 Packages Projects Releases Wiki Activity

os/bluestore: add fast-path allocation latency perf counter for Allocator

Browse Source 
Fixes: https://tracker.ceph.com/issues/76936

Signed-off-by: Jaya Prakash <jayaprakash@ibm.com>
This commit is contained in:
Jaya Prakash 2026-07-01 13:22:48 +00:00
parent 1004a24eca
commit b883573faa
3 changed files with 11 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
src/os/bluestore/AllocatorBase.cc
View File

@ -215,7 +215,7 @@ void AllocatorPerf::_init_logger(std::string_view name) {
b.add_time_avg(l_bluestore_allocator_alloc_process_lat,
"alloc_process_lat",
"Allocator processing latency",
"Allocator processing latency while holding lock",
"apl",
PerfCountersBuilder::PRIO_USEFUL);
b.add_time_avg(l_bluestore_allocator_lock_wait_lat,
@ -223,6 +223,11 @@ void AllocatorPerf::_init_logger(std::string_view name) {
"Allocator lock wait latency",
"lwl",
PerfCountersBuilder::PRIO_USEFUL);
b.add_time_avg(l_bluestore_allocator_nolock_process_lat,
"nolock_process_lat",
"Allocator lockless fast-path allocation latency",
"fpl",
PerfCountersBuilder::PRIO_USEFUL);
logger = b.create_perf_counters();

1
src/os/bluestore/AllocatorBase.h
View File

@ -26,6 +26,7 @@ enum {
l_bluestore_allocator_first = 732300,
l_bluestore_allocator_alloc_process_lat,
l_bluestore_allocator_lock_wait_lat,
l_bluestore_allocator_nolock_process_lat,
l_bluestore_allocator_last
};

4
src/os/bluestore/Btree2Allocator.cc
View File

@ -86,9 +86,13 @@ int64_t Btree2Allocator::allocate(
max_alloc_size = p2align(uint64_t(cap), (uint64_t)block_size);
}
uint64_t cached_chunk_offs = 0;
auto fast_alloc_start = mono_clock::now();
if (cache && cache->try_get(&cached_chunk_offs, want)) {
num_free -= want;
extents->emplace_back(cached_chunk_offs, want);
logger->tinc_with_max(
l_bluestore_allocator_nolock_process_lat,
mono_clock::now() - fast_alloc_start);
return want;
}
auto lock_wait_start = mono_clock::now();