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Measure nanomsg perf after error handling implementation  #57

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Measure nanomsg perf after error handling implementation #57
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sampsongao
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Milestone 5

Description

@aruneshchandra
aruneshchandra
opened on Jan 20, 2017
No description provided.

Activity

  1. aruneshchandra
    added this to the Milestone 4 milestone on Jan 20, 2017
  2. aruneshchandra
    assigned
    sampsongao
    on Jan 20, 2017

  3. sampsongao commented on Feb 6, 2017

    @sampsongao
    sampsongao
    on Feb 6, 2017
    Collaborator

    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

  4. sampsongao commented on Feb 6, 2017

    @sampsongao
    sampsongao
    on Feb 6, 2017
    Collaborator

    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

  5. sampsongao commented on Feb 6, 2017

    @sampsongao
    sampsongao
    on Feb 6, 2017
    Collaborator
    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.

  6. mhdawson commented on Feb 7, 2017

    @mhdawson
    mhdawson
    on Feb 7, 2017
    Member

    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.

  7. mhdawson commented on Feb 7, 2017

    @mhdawson
    mhdawson
    on Feb 7, 2017
    Member

    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.

  8. sampsongao commented on Feb 8, 2017

    @sampsongao
    sampsongao
    on Feb 8, 2017
    Collaborator

    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

  9. mhdawson commented on Feb 8, 2017

    @mhdawson
    mhdawson
    on Feb 8, 2017
    Member

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

  10. aruneshchandra commented on Feb 10, 2017

    @aruneshchandra
    aruneshchandra
    on Feb 10, 2017
    ContributorAuthor

    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.

  11. sampsongao commented on Feb 10, 2017

    @sampsongao
    sampsongao
    on Feb 10, 2017
    Collaborator

    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

  12. sampsongao commented on Feb 10, 2017

    @sampsongao
    sampsongao
    on Feb 10, 2017
    Collaborator

    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

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

  14. sampsongao commented on Feb 28, 2017

    @sampsongao
    sampsongao
    on Feb 28, 2017
    Collaborator

    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

  15. jasongin commented on Feb 28, 2017

    @jasongin
    jasongin
    on Feb 28, 2017
    Member

    @sampsongao What was the fix?

  16. digitalinfinity commented on Feb 28, 2017

    @digitalinfinity
    digitalinfinity
    on Feb 28, 2017
    Contributor

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

  17. sampsongao commented on Mar 1, 2017

    @sampsongao
    sampsongao
    on Mar 1, 2017
    Collaborator

    This is using 1 byte message.

  18. aruneshchandra commented on Mar 1, 2017

    @aruneshchandra
    aruneshchandra
    on Mar 1, 2017
    ContributorAuthor

    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%
  19. aruneshchandra
    closed this as completedon Mar 1, 2017
  20. sampsongao
    reopened this on Mar 6, 2017

  21. sampsongao commented on Mar 6, 2017

    @sampsongao
    sampsongao
    on Mar 6, 2017
    Collaborator

    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.

  22. jasongin commented on Mar 6, 2017

    @jasongin
    jasongin
    on Mar 6, 2017
    Member

    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.

  23. sampsongao commented on Mar 6, 2017

    @sampsongao
    sampsongao
    on Mar 6, 2017
    Collaborator

    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.

  24. jasongin commented on Mar 6, 2017

    @jasongin
    jasongin
    on Mar 6, 2017
    Member

    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.

  25. sampsongao commented on Mar 7, 2017

    @sampsongao
    sampsongao
    on Mar 7, 2017
    Collaborator

    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%
  26. aruneshchandra
    closed this as completedon Mar 9, 2017
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