Measure nanomsg perf after error handling implementation #57

aruneshchandra · 2017-01-20T20:48:23Z

No description provided.

sampsongao · 2017-02-06T18:38:53Z

Raw Output

After Error Handling

nanomsg sampsongao/node-nanomsg@df36232
node-napi ae24137

node-6.2 perf/local_lat.js tcp://127.0.0.1:5555 1 100000& node-6.2 perf/remote_l at.js tcp://127.0.0.1:5555 1 100000 && wait
message size: 1 [B]
roundtrip count: 100000
average latency: 164.607 [us]
node-6.2 perf/local_thr.js tcp://127.0.0.1:5556 1 100000& node-6.2 perf/remote_thr.js tcp://127.0.0.1:5556 1 100000 && wait
message size: 1 [B]
message count: 100000
throughput: 3841 [msg/s]
throughput: 0.031 [Mb/s]

node-6.2 perf/local_lat.js tcp://127.0.0.1:5555 1 100000& node-6.2 perf/remote_lat.js tcp://127.0.0.1:5555 1 100000 && wait
message size: 1 [B]
roundtrip count: 100000
average latency: 171.08 [us]
node-6.2 perf/local_thr.js tcp://127.0.0.1:5556 1 100000& node-6.2 perf/remote_thr.js tcp://127.0.0.1:5556 1 100000 && wait
message size: 1 [B]
message count: 100000
throughput: 3913 [msg/s]
throughput: 0.031 [Mb/s]

node-6.2 perf/local_lat.js tcp://127.0.0.1:5555 1 100000& node-6.2 perf/remote_lat.js tcp://127.0.0.1:5555 1 100000 && wait
message size: 1 [B]
roundtrip count: 100000
average latency: 154.051 [us]
node-6.2 perf/local_thr.js tcp://127.0.0.1:5556 1 100000& node-6.2 perf/remote_thr.js tcp://127.0.0.1:5556 1 100000 && wait
message size: 1 [B]
message count: 100000
throughput: 4307 [msg/s]
throughput: 0.034 [Mb/s]

node-6.2 perf/local_lat.js tcp://127.0.0.1:5555 1 100000& node-6.2 perf/remote_lat.js tcp://127.0.0.1:5555 1 100000 && wait
message size: 1 [B]
roundtrip count: 100000
average latency: 140.03 [us]
node-6.2 perf/local_thr.js tcp://127.0.0.1:5556 1 100000& node-6.2 perf/remote_thr.js tcp://127.0.0.1:5556 1 100000 && wait
message size: 1 [B]
message count: 100000
throughput: 4275 [msg/s]
throughput: 0.034 [Mb/s]

node-6.2 perf/local_lat.js tcp://127.0.0.1:5555 1 100000& node-6.2 perf/remote_lat.js tcp://127.0.0.1:5555 1 100000 && wait
message size: 1 [B]
roundtrip count: 100000
average latency: 160.49 [us]
node-6.2 perf/local_thr.js tcp://127.0.0.1:5556 1 100000& node-6.2 perf/remote_thr.js tcp://127.0.0.1:5556 1 100000 && wait
message size: 1 [B]
message count: 100000
throughput: 4055 [msg/s]
throughput: 0.032 [Mb/s]

real 0m9.445s
user 0m3.991s
sys 0m0.798s

real 0m9.632s
user 0m4.179s
sys 0m0.828s

real 0m9.159s
user 0m3.817s
sys 0m0.763s

real 0m9.645s
user 0m3.892s
sys 0m0.745s

real 0m9.607s
user 0m4.191s
sys 0m0.732s

Before Error handling

nanomsg sampsongao/node-nanomsg@c70c99c
node-api 67f4581

node-6.2 perf/local_lat.js tcp://127.0.0.1:5555 1 100000& node-6.2 perf/remote_lat.js tcp://127.0.0.1:5555 1 100000 && wait
message size: 1 [B]
roundtrip count: 100000
average latency: 146.274 [us]
node-6.2 perf/local_thr.js tcp://127.0.0.1:5556 1 100000& node-6.2 perf/remote_thr.js tcp://127.0.0.1:5556 1 100000 && wait
message size: 1 [B]
message count: 100000
throughput: 4077 [msg/s]
throughput: 0.033 [Mb/s]

node-6.2 perf/local_lat.js tcp://127.0.0.1:5555 1 100000& node-6.2 perf/remote_lat.js tcp://127.0.0.1:5555 1 100000 && wait
message size: 1 [B]
roundtrip count: 100000
average latency: 162.018 [us]
node-6.2 perf/local_thr.js tcp://127.0.0.1:5556 1 100000& node-6.2 perf/remote_thr.js tcp://127.0.0.1:5556 1 100000 && wait
message size: 1 [B]
message count: 100000
throughput: 4037 [msg/s]
throughput: 0.032 [Mb/s]

node-6.2 perf/local_lat.js tcp://127.0.0.1:5555 1 100000& node-6.2 perf/remote_lat.js tcp://127.0.0.1:5555 1 100000 && wait
message size: 1 [B]
roundtrip count: 100000
average latency: 147.787 [us]
node-6.2 perf/local_thr.js tcp://127.0.0.1:5556 1 100000& node-6.2 perf/remote_thr.js tcp://127.0.0.1:5556 1 100000 && wait
message size: 1 [B]
message count: 100000
throughput: 4105 [msg/s]
throughput: 0.033 [Mb/s]

node-6.2 perf/local_lat.js tcp://127.0.0.1:5555 1 100000& node-6.2 perf/remote_lat.js tcp://127.0.0.1:5555 1 100000 && wait
message size: 1 [B]
roundtrip count: 100000
average latency: 140.077 [us]
node-6.2 perf/local_thr.js tcp://127.0.0.1:5556 1 100000& node-6.2 perf/remote_thr.js tcp://127.0.0.1:5556 1 100000 && wait
message size: 1 [B]
message count: 100000
throughput: 4592 [msg/s]
throughput: 0.037 [Mb/s]

node-6.2 perf/local_lat.js tcp://127.0.0.1:5555 1 100000& node-6.2 perf/remote_lat.js tcp://127.0.0.1:5555 1 100000 && wait
message size: 1 [B]
roundtrip count: 100000
average latency: 137.002 [us]
node-6.2 perf/local_thr.js tcp://127.0.0.1:5556 1 100000& node-6.2 perf/remote_thr.js tcp://127.0.0.1:5556 1 100000 && wait
message size: 1 [B]
message count: 100000
throughput: 4532 [msg/s]
throughput: 0.036 [Mb/s]

real 0m9.819s
user 0m3.851s
sys 0m0.724s

real 0m9.638s
user 0m4.009s
sys 0m0.829s

real 0m9.554s
user 0m4.452s
sys 0m0.730s

real 0m9.789s
user 0m4.198s
sys 0m0.831s

real 0m9.465s
user 0m4.173s
sys 0m0.701s

Before napi

nanomsg: sampsongao/node-nanomsg@4e2bccf
node-api: a4705f6

node-6.2 perf/local_lat.js tcp://127.0.0.1:5555 1 100000& node-6.2 perf/remote_lat.js tcp://127.0.0.1:5555 1 100000 && wait
message size: 1 [B]
roundtrip count: 100000
average latency: 132.443 [us]
node-6.2 perf/local_thr.js tcp://127.0.0.1:5556 1 100000& node-6.2 perf/remote_thr.js tcp://127.0.0.1:5556 1 100000 && wait
message size: 1 [B]
message count: 100000
throughput: 4081 [msg/s]
throughput: 0.033 [Mb/s]

node-6.2 perf/local_lat.js tcp://127.0.0.1:5555 1 100000& node-6.2 perf/remote_lat.js tcp://127.0.0.1:5555 1 100000 && wait
message size: 1 [B]
roundtrip count: 100000
average latency: 125.822 [us]
node-6.2 perf/local_thr.js tcp://127.0.0.1:5556 1 100000& node-6.2 perf/remote_thr.js tcp://127.0.0.1:5556 1 100000 && wait
message size: 1 [B]
message count: 100000
throughput: 4415 [msg/s]
throughput: 0.035 [Mb/s]

node-6.2 perf/local_lat.js tcp://127.0.0.1:5555 1 100000& node-6.2 perf/remote_lat.js tcp://127.0.0.1:5555 1 100000 && wait
message size: 1 [B]
roundtrip count: 100000
average latency: 119.545 [us]
node-6.2 perf/local_thr.js tcp://127.0.0.1:5556 1 100000& node-6.2 perf/remote_thr.js tcp://127.0.0.1:5556 1 100000 && wait
message size: 1 [B]
message count: 100000
throughput: 4328 [msg/s]
throughput: 0.035 [Mb/s]

node-6.2 perf/local_lat.js tcp://127.0.0.1:5555 1 100000& node-6.2 perf/remote_lat.js tcp://127.0.0.1:5555 1 100000 && wait
message size: 1 [B]
roundtrip count: 100000
average latency: 136.911 [us]
node-6.2 perf/local_thr.js tcp://127.0.0.1:5556 1 100000& node-6.2 perf/remote_thr.js tcp://127.0.0.1:5556 1 100000 && wait
message size: 1 [B]
message count: 100000
throughput: 4250 [msg/s]
throughput: 0.034 [Mb/s]

node-6.2 perf/local_lat.js tcp://127.0.0.1:5555 1 100000& node-6.2 perf/remote_lat.js tcp://127.0.0.1:5555 1 100000 && wait
message size: 1 [B]
roundtrip count: 100000
average latency: 122.18 [us]
node-6.2 perf/local_thr.js tcp://127.0.0.1:5556 1 100000& node-6.2 perf/remote_thr.js tcp://127.0.0.1:5556 1 100000 && wait
message size: 1 [B]
message count: 100000
throughput: 4392 [msg/s]
throughput: 0.035 [Mb/s]

real 0m9.668s
user 0m4.390s
sys 0m0.829s

real 0m9.390s
user 0m3.865s
sys 0m0.773s

real 0m9.513s
user 0m4.075s
sys 0m0.846s

real 0m9.577s
user 0m4.176s
sys 0m0.812s

real 0m9.638s
user 0m4.108s
sys 0m0.735s

sampsongao · 2017-02-06T18:57:17Z

After introduction of error handling

nanomsg sampsongao/node-nanomsg@df36232
node-api ae24137

Items	1	2	3	4	5	Average
average latency [us]	164.607	171.080	154.051	140.030	160.490	158.0516
throughput [msg/s]	3841	3913	4307	4275	4055	4078.2
throughput [Mb/s]	0.031	0.031	0.034	0.034	0.032	0.0324
real [s]	9.445	9.632	9.159	9.645	9.607	9.4976
user [s]	3.991	4.179	3.817	3.892	4.191	4.014
sys [s]	0.798	0.828	0.763	0.745	0.732	0.773

After introduction of napi

nanomsg sampsongao/node-nanomsg@c70c99c
node-api 67f4581

Items	1	2	3	4	5	Average
average latency [us]	146.274	162.018	147.787	140.077	137.002	146.6316
throughput [msg/s]	4077	4037	4105	4592	4532	4268.6
throughput [Mb/s]	0.033	0.032	0.033	0.037	0.036	0.0342
real [s]	9.819	9.638	9.554	9.789	9.465	9.653
user [s]	3.851	4.009	4.452	4.198	4.173	4.1366
sys [s]	0.724	0.829	0.73	0.831	0.701	0.763

Original

nanomsg: sampsongao/node-nanomsg@4e2bccf
node-api: a4705f6

Items	1	2	3	4	5	Average
average latency [us]	132.443	125.822	119.545	136.911	122.180	127.3802
throughput [msg/s]	4081	4415	4328	4250	4392	4293.2
throughput [Mb/s]	0.033	0.035	0.035	0.034	0.035	0.0344
real [s]	9.668	9.39	9.513	9.577	9.638	9.5572
user [s]	4.39	3.865	4.075	4.176	4.108	4.1228
sys [s]	0.829	0.773	0.846	0.812	0.735	0.799

sampsongao · 2017-02-06T19:06:26Z

Items	delta before and after error handling %	delta before and after napi %	combined
average latency [us]	7.225488385	13.12909359	24.07862446
throughput [msg/s]	-4.668726399	-0.576301363	-5.007919501
throughput [Mb/s]	-5.555555556	-0.584795322	-5.813953488
real [s]	-1.63620283	0.992437584	-0.623613611
user [s]	-3.054309915	0.33360731	-2.638983215
sys [s]	1.319192964	-4.718217562	-3.229036295

So we introduced about 24% more latency and about 5 percent regression in throughput.

mhdawson · 2017-02-07T14:44:35Z

I'm not sure but does this mean it is for 1 byte messages: message size: 1 [B] ? If so we probably want data with more realistic message sizes as well (hoping its configurable) as I'd expect in real-life 1 byte messages won't necessarily be the norm.

mhdawson · 2017-02-07T14:48:22Z

I might also be useful to try to find the section of code that most affects the latency so we can understand where the additional time is being added.

sampsongao · 2017-02-08T20:27:22Z

for message size of 10 bytes

Items	delta before and after error handling %	delta before and after napi %	combined
average latency [us]	0.189636483	22.50655384	29.28834857
throughput [msg/s]	-0.537879479	5.889553863	5.689646866
throughput [Mb/s]	-0.626780627	6.002265006	5.722891566

mhdawson · 2017-02-08T21:24:00Z

We should be able to use standard profiling tools, perf even has node.js support so I'd start with that on linux

aruneshchandra · 2017-02-10T19:27:07Z

To understand why Latency is 30% slower with NAPI.
Next steps: Try to stub out NAPI calls on the hot path with static data or V8 calls to find out which NAPI calls are causing the overhead. Also try with larger message size like 1000 bytes.

sampsongao · 2017-02-10T19:28:56Z

Weight within napi

9.55% node node [.] napi_get_value_int32 ◆
9.38% node node [.] napi_get_cb_args ▒
7.09% node node [.] napi_set_return_value ▒
5.53% node node [.] napi_get_current_env ▒
5.30% node node [.] napi_create_number ▒
5.19% node node_nanomsg.node [.] Send(napi_env__, napi_callback_info__) ▒
4.97% node node [.] napi_escape_handle ▒
4.47% node node [.] napi_make_callback ▒
4.36% node node [.] napi_get_element ▒
4.24% node node [.] v8impl::FunctionCallbackWrapper::Args(napi_value__**▒
4.13% node node [.] napi_open_handle_scope ▒
3.85% node node [.] napi_get_persistent_value ▒
3.29% node node [.] napi_get_global ▒
3.13% node node [.] napi_close_handle_scope ▒
3.02% node node_nanomsg.node [.] Recv(napi_env__, napi_callback_info__) ▒
2.90% node node [.] napi_buffer_copy ▒
2.62% node node [.] napi_open_escapable_handle_scope ▒
2.62% node node [.] napi_buffer_has_instance ▒
2.29% node node [.] v8impl::FunctionCallbackWrapper::SetReturnValue(napi▒
2.01% node node [.] napi_close_escapable_handle_scope ▒
1.12% node node [.] napi_buffer_data ▒
0.89% node node_nanomsg.node [.] PollSendSocket(napi_env__, napi_callback_info__) ▒
0.89% node node [.] napi_create_persistent ▒
0.67% node node [.] napi_buffer_new ▒
0.61% node node_nanomsg.node [.] napi_get_current_env@plt ▒
0.61% node node_nanomsg.node [.] napi_set_return_value@plt ▒
0.61% node node [.] napi_buffer_length ▒
0.56% node node_nanomsg.node [.] napi_create_number@plt ▒
0.56% node node [.] napi_create_object ▒
0.45% node node_nanomsg.node [.] napi_get_cb_args@plt ▒
0.34% node node_nanomsg.node [.] napi_close_handle_scope@plt ▒
0.34% node node_nanomsg.node [.] napi_get_value_int32@plt ▒
0.34% node node_nanomsg.node [.] PollStop(napi_env__, napi_callback_info__) ▒
0.28% node node_nanomsg.node [.] napi_make_callback@plt ▒
0.28% node node_nanomsg.node [.] napi_buffer_has_instance@plt ▒
0.28% node node_nanomsg.node [.] napi_open_escapable_handle_scope@plt ▒
0.28% node node_nanomsg.node [.] napi_close_escapable_handle_scope@plt ▒
0.28% node node [.] napi_set_element ▒
0.11% node node_nanomsg.node [.] napi_buffer_copy@plt ▒
0.11% node node_nanomsg.node [.] napi_buffer_data@plt ▒
0.11% node node_nanomsg.node [.] napi_get_global@plt ▒
0.11% node node_nanomsg.node [.] napi_open_handle_scope@plt ▒
0.11% node node_nanomsg.node [.] napi_create_object@plt ▒
0.06% node node_nanomsg.node [.] napi_get_element@plt ▒
0.06% node node_nanomsg.node [.] napi_create_persistent@plt

sampsongao · 2017-02-10T19:36:15Z

System Info

Ubuntu 14.04.2 LTS (GNU/Linux 3.13.0-55-generic x86_64)

CPU Info

Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
CPU(s): 2
On-line CPU(s) list: 0,1
Thread(s) per core: 1
Core(s) per socket: 1
Socket(s): 2
NUMA node(s): 1
Vendor ID: GenuineIntel
CPU family: 6
Model: 45
Stepping: 7
CPU MHz: 2400.000
BogoMIPS: 4800.00
Hypervisor vendor: VMware
Virtualization type: full
L1d cache: 32K
L1i cache: 32K
L2 cache: 256K
L3 cache: 20480K
NUMA node0 CPU(s): 0,1

sampsongao · 2017-02-28T22:06:02Z

Performance update after fixing the GC from Napi::Callback #120

Items	delta before and after error handling %	delta before and after napi %	combined
latency [us]	0.95	6.82	7.83
throughput [msg/s]	0.21	-0.12	0.09
throughput [Mb/s]	0.53	0.00	0.53

jasongin · 2017-02-28T22:12:04Z

@sampsongao What was the fix?

digitalinfinity · 2017-02-28T22:30:45Z

Also, what was the workload here? Same as before, 10 byte messages?

sampsongao · 2017-03-01T04:23:41Z

This is using 1 byte message.

aruneshchandra · 2017-03-01T22:15:07Z

Data from @sampsongao using 1 byte message size

Items	Non N-API	N-API	Delta
Latency [us]	107.1128	115.5018	7.83%
Throughput [msg/s]	4679.6	4683.6	0.09%
Throughput [Mb/s]	0.0374	0.0376	0.53%

sampsongao · 2017-03-06T21:10:50Z

Update: investigated further about the reason of this GC difference. The conclusion is that nanomsg code itself is introducing a leak by not freeing Napi::Callback allocated and thus the extra object we allocate in Napi::Callback is taking extra space. By freeing Napi::Callback, Nan implementation and Napi implementation of Callback are both ok. But not sure if we want to be different from nan in this case?

So the fix is as following

diff --git a/src/node_nanomsg.cc b/src/node_nanomsg.cc
index a8f7c58..7588826 100644
--- a/src/node_nanomsg.cc
+++ b/src/node_nanomsg.cc
@@ -499,6 +499,12 @@ NAPI_METHOD(PollReceiveSocket) {
   }
 }

+static void close_cb(uv_handle_t *handle) {
+  const nanomsg_socket_t* const context = static_cast<nanomsg_socket_t*>(handle->data);
+  delete context->callback;
+  delete context;
+}
+
 NAPI_METHOD(PollStop) {
   napi_status status;
   napi_value args[1];
@@ -507,6 +513,7 @@ NAPI_METHOD(PollStop) {

   nanomsg_socket_t *context = UnwrapPointer<nanomsg_socket_t *>(args[0]);
   int r = uv_poll_stop(&context->poll_handle);
+  uv_close(reinterpret_cast<uv_handle_t*>(&context->poll_handle), close_cb);
   napi_value ret;
   status = napi_create_number(env, r, &ret);
   CHECK_STATUS;

Which is already resolved in original node-nanomsg repo. So my next step is to pull in update from original repo and remeasure the performance based on the most updated nanomsg code.

jasongin · 2017-03-06T21:18:06Z

not sure if we want to be different from nan in this case?

Different in what way?

In general we should not be too concerned with doing things exactly like nan. First, Nan is very V8-specific. Second, Nan is basically unable to make breaking changes to fix any issues in its API, because its entire purpose is to provide a more stable API. Since we are introducing an entirely new API, now is our chance to make improvements. See this comment from the Nan maintainer.

sampsongao · 2017-03-06T21:28:57Z

So in Nan::Callback, it put the callback directly under the persistent value; in Napi::Callback, we have first store callback under object, and then put the object under the persistent value. Not sure if this is necessary or bringing us any improvement.

jasongin · 2017-03-06T21:34:44Z

That indirection serves no purpose as far as I can see.

Note the Callback class along with everything else in node_api_helpers.h is obsolete and will not be included in the PR to node that we make soon. We need to update all our ported modules to use the new C++ wrappers instead. There, there is no Callback class; you should use Napi::Reference<Napi::Function> instead. (Maybe there should be a typedef?) And then what you get is a Persistent reference to a Function, without the extra Object indirection.

sampsongao · 2017-03-07T21:30:50Z

Port nanomsg on their current master at napi-port-3.2.4.
New measurement on message size of 1 byte.

Items	Non N-API	N-API	Delta
Latency [us]	102.6978	112.7798	9.82%
Throughput [msg/s]	4730.4	4697.6	-0.69%
Throughput [Mb/s]	0.038	0.0376	-1.05%

aruneshchandra added this to the Milestone 4 milestone Jan 20, 2017

aruneshchandra assigned sampsongao Jan 20, 2017

aruneshchandra mentioned this issue Jan 20, 2017

Measure NAPI perf for nanomsg perf benchmark #8

Closed

aruneshchandra modified the milestones: Milestone 5, Milestone 4 Feb 23, 2017

aruneshchandra closed this as completed Mar 1, 2017

sampsongao reopened this Mar 6, 2017

aruneshchandra closed this as completed Mar 9, 2017

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Measure nanomsg perf after error handling implementation #57

Measure nanomsg perf after error handling implementation #57

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Measure nanomsg perf after error handling implementation #57

Measure nanomsg perf after error handling implementation #57

Comments

aruneshchandra commented Jan 20, 2017

sampsongao commented Feb 6, 2017

Raw Output

After Error Handling

Before Error handling

Before napi

sampsongao commented Feb 6, 2017 • edited Loading

After introduction of error handling

After introduction of napi

Original

sampsongao commented Feb 6, 2017

mhdawson commented Feb 7, 2017

mhdawson commented Feb 7, 2017

sampsongao commented Feb 8, 2017 • edited Loading

for message size of 10 bytes

mhdawson commented Feb 8, 2017

aruneshchandra commented Feb 10, 2017

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Weight within napi

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System Info

CPU Info

sampsongao commented Feb 28, 2017 • edited Loading

Performance update after fixing the GC from Napi::Callback #120

jasongin commented Feb 28, 2017

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sampsongao commented Feb 28, 2017 •

edited

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sampsongao commented Mar 6, 2017 •

edited

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sampsongao commented Mar 7, 2017 •

edited

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