diff options
author | Qiaowei Ren <qiaowei.ren@intel.com> | 2018-01-04 13:43:33 +0800 |
---|---|---|
committer | Qiaowei Ren <qiaowei.ren@intel.com> | 2018-01-05 11:59:39 +0800 |
commit | 812ff6ca9fcd3e629e49d4328905f33eee8ca3f5 (patch) | |
tree | 04ece7b4da00d9d2f98093774594f4057ae561d4 /src/ceph/doc/dev/perf.rst | |
parent | 15280273faafb77777eab341909a3f495cf248d9 (diff) |
initial code repo
This patch creates initial code repo.
For ceph, luminous stable release will be used for base code,
and next changes and optimization for ceph will be added to it.
For opensds, currently any changes can be upstreamed into original
opensds repo (https://github.com/opensds/opensds), and so stor4nfv
will directly clone opensds code to deploy stor4nfv environment.
And the scripts for deployment based on ceph and opensds will be
put into 'ci' directory.
Change-Id: I46a32218884c75dda2936337604ff03c554648e4
Signed-off-by: Qiaowei Ren <qiaowei.ren@intel.com>
Diffstat (limited to 'src/ceph/doc/dev/perf.rst')
-rw-r--r-- | src/ceph/doc/dev/perf.rst | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/src/ceph/doc/dev/perf.rst b/src/ceph/doc/dev/perf.rst new file mode 100644 index 0000000..5e42255 --- /dev/null +++ b/src/ceph/doc/dev/perf.rst @@ -0,0 +1,39 @@ +Using perf +========== + +Top:: + + sudo perf top -p `pidof ceph-osd` + +To capture some data with call graphs:: + + sudo perf record -p `pidof ceph-osd` -F 99 --call-graph dwarf -- sleep 60 + +To view by caller (where you can see what each top function calls):: + + sudo perf report --call-graph caller + +To view by callee (where you can see who calls each top function):: + + sudo perf report --call-graph callee + +:note: If the caller/callee views look the same you may be + suffering from a kernel bug; upgrade to 4.8 or later. + +Flamegraphs +----------- + +First, get things set up:: + + cd ~/src + git clone https://github.com/brendangregg/FlameGraph + +Run ceph, then record some perf data:: + + sudo perf record -p `pidof ceph-osd` -F 99 --call-graph dwarf -- sleep 60 + +Then generate the flamegraph:: + + sudo perf script | ~/src/FlameGraph/stackcollapse-perf.pl > /tmp/folded + ~/src/FlameGraph/flamegraph.pl /tmp/folded > /tmp/perf.svg + firefox /tmp/perf.svg |