Thank you very much! After reading this email, I understand the calling event
api process. But in the step 3, i do not know call which function and how to
call? In the test/ext/vapi_c_test.c, i can not find the function proto which in
using. Can you write a simple client which get stat event by C ? Thank you very
much!
------------------ ???????? ------------------
??????: "Klement Sekera -X (ksekera - PANTHEON TECHNOLOGIES at
Cisco)";<ksek...@cisco.com>;
????????: 2017??9??27??(??????) ????3:15
??????: "????????"<15803846...@qq.com>;"Keith Burns"<alaga...@gmail.com>;
????: "vpp-dev"<vpp-dev@lists.fd.io>;
????: Re: [vpp-dev] ?????? ?????? How to get interface stats using C api?
There are new C and C++ APIs added recently to vpp source code along
with test programs. You can take a look at test/ext/vapi_c_test.c and
vapi_cpp_test.cpp. Functions receiving stats are named test_stats_XXX().
These are there to verify that receiving events works. Functionally,
these are the same, they just test different ways of doing stuff.
At shared memory level it looks like this:
1.) client -> want_stats -> vpp
2.) vpp -> want_stats_reply -> client (confirms subscription)
3.) vpp -> <various stats messages> -> client (when timer fires)
in step 3.), client needs to read the shared memory queue in the
vpp->client direction (or use the appropriate XXX_read() function). Note
that stats take a few seconds to arrive (the test programs require
10-15 seconds of runtime to get some stats).
HTH,
Klement
Quoting ???????? (2017-09-27 04:55:29)
> That is ok??
> Now I am research calling the plugin apis by C. Especially how to call
> the event apis. I would appreciate it if you can write a brief client.
> ------------------ ???????? ------------------
> ??????: "Keith Burns";<alaga...@gmail.com>;
> ????????: 2017??9??27??(??????) ????10:47
> ??????: "????????"<15803846...@qq.com>;
> ????: "vpp-dev"<vpp-dev@lists.fd.io>;
> ????: Re: ?????? [vpp-dev] How to get interface stats using C api?
> Apologies,
> It's a callback.
> We probably need some decent literature written for how to consume the
> various C, C++, Python and Lua APIs
> If you have a preference for any of those languages I could write a brief
> client program for you and start work on documenting this stuff.
> On Sep 26, 2017 6:04 PM, "????????" <[1]15803846...@qq.com> wrote:
>
> Hi??
> Thank you for your detail information. After reading this, i can
> understand. But after calling "want_per_interface_simple_stats" with
> enable_disable=1, num=1 and sw_ifs[4], i do not know how to receive this
> stats. calling other function or variable? Can you tell me how to
> receive stats in my c program?
> Thanks??
> ------------------ ???????? ------------------
> ??????: "Keith Burns";<[2]alaga...@gmail.com>;
> ????????: 2017??9??27??(??????) ????6:39
> ??????: "??????
> ??"<[3]15803846...@qq.com>;"vpp-dev"<[4]vpp-dev@lists.fd.io>;
> ????: Re: [vpp-dev] How to get interface stats using C api?
> Hi there,
> As of 17.10 you can now register for statistics on a per interface
> level.
> You need the sw_if_index of the interface you want stats for, but the
> calls are in
> [5]https://git.fd.io/vpp/tree/src/vpp/stats/stats.api
> but as an example:
> Register:
>
> autoreply define want_per_interface_simple_stats
> {
> u32 client_index;
> u32 context;
> u32 enable_disable;
> u32 pid;
> u32 num;
> u32 sw_ifs[num];
>
> };
>
> So calling "want_per_interface_simple_stats" with enable_disable=1, num=1
> and sw_ifs[4] will give you
>
> interface_simple_stats every 10sec for sw_if_index=4.
>
> The content of "interface_simple_stats" looks like:
>
> /** \brief Simple per interface stats counters structure
> @param count - number of elements in message
> @param timestamp - u32 vlib timestamp for control plane
> @param data[count] - vl_api_vnet_simple_counter_t
>
> */
> manual_print manual_endian define vnet_per_interface_simple_counters
> {
> u32 count;
> u32 timestamp;
> vl_api_vnet_simple_counter_t data[count];
> };
>
> Where each "vnet_simple_counter_t" looks like:
>
> [6]https://git.fd.io/vpp/tree/src/vnet/interface.api
>
> /** \brief Simple interface counter data type for
> vnet_interface_simple_counters
> @param sw_if_index - interface indexes for counters
> @param drop - RX or TX drops due to buffer starvation
> @param punt - used with VNET "punt" disposition
> @param rx_ip4 - received IP4 packets
> @param rx_ip6 - received IP6 packets
> @param rx_no_buffer - no RX buffers available
> @param rx_miss - receive misses
> @param rx_error - receive errors
> @param tx_error - transmit errors
> @param rx_mpls - received MPLS packet
>
> */
> typeonly manual_print manual_endian define vnet_simple_counter
> {
> u32 sw_if_index;
> u64 drop;
> u64 punt;
> u64 rx_ip4;
> u64 rx_ip6;
> u64 rx_no_buffer;
> u64 rx_miss;
> u64 rx_error;
> u64 tx_error;
> u64 rx_mpls;
> };
>
> So you will get back an array of counter structs for each sw_if_index you
> registered for.
>
> At the moment the impl sends on sw_if_index per reply but that is going to
> change so that for each client we send as much in one message as possible.
>
> On Tue, Sep 26, 2017 at 4:50 AM ???????? <[7]15803846...@qq.com> wrote:
>
> Hi, everyone!
> How to get interface stats using C api?
> For example, I want to know "GigabitEthernete/0/1" rx packets , what should
> I do?
>
> Thanks
>
> _______________________________________________
> vpp-dev mailing list
> [8]vpp-dev@lists.fd.io
> [9]https://lists.fd.io/mailman/listinfo/vpp-dev
>
> References
>
> Visible links
> 1. mailto:15803846...@qq.com
> 2. mailto:alaga...@gmail.com
> 3. mailto:15803846...@qq.com
> 4. mailto:vpp-dev@lists.fd.io
> 5. https://git.fd.io/vpp/tree/src/vpp/stats/stats.api
> 6. https://git.fd.io/vpp/tree/src/vnet/interface.api
> 7. mailto:15803846...@qq.com
> 8. mailto:vpp-dev@lists.fd.io
> 9. https://lists.fd.io/mailman/listinfo/vpp-dev_______________________________________________
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