Commits on Mar 18, 2022

1. send: Add network bandwidth benchmark …

   Copy from `~buczek/src/small/send.c`.

   

   donald authored and pmenzel committed Mar 18, 2022
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2. send: Specify int as main()’s return type and include string.h …

   Fix the warnings below:
   
       $ make send
       cc     send.c   -o send
       send.c:41:1: warning: return type defaults to ‘int’ [-Wimplicit-int]
        main(int argc,char *argv[]) {
        ^~~~
       send.c: In function ‘main’:
       send.c:63:5: warning: implicit declaration of function ‘memset’ [-Wimplicit-function-declaration]
            memset(buffer,0xA3,sizeof(buffer));
            ^~~~~~
       send.c:63:5: warning: incompatible implicit declaration of built-in function ‘memset’
       send.c:63:5: note: include ‘<string.h>’ or provide a declaration of ‘memset’
       send.c:79:5: warning: implicit declaration of function ‘memcpy’ [-Wimplicit-function-declaration]
            memcpy(&sin.sin_addr,he->h_addr,he->h_length);
            ^~~~~~
       send.c:79:5: warning: incompatible implicit declaration of built-in function ‘memcpy’
       send.c:79:5: note: include ‘<string.h>’ or provide a declaration of ‘memcpy’
   
   Reported-by: gcc (GCC) 7.5.0

   

   pmenzel committed Mar 18, 2022
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3. send: Strip trailing spaces

   

   pmenzel committed Mar 18, 2022
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4. send: Build, track and install executable …

   Build with `make send`, add it to the git archive, and install it to
   `/usr/bin`.

   

   pmenzel committed Mar 18, 2022
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5. send: Make byteCount unsigned long …

   Currently, negative benchmark values are shown:
   
       @ira$ send okeanos 34141
       start : 1647613816.868339
       close : 1647613826.868524
       done  : 1647613826.874427
       -1209148824 bytes in 10.006088 seconds
       -120841314.207910 bytes / seconds
       -966730513.663282 bits  / seconds
       -966730.513663 kBit/s  / seconds
       -966.730514 MBit/s  / seconds
   
   With 10 Gbit/s, in 10 s seconds theoretically up to 12.5 GB could be
   transferred. But a 32-bit (signed) integer can at maximum store the
   number (2147483648 - 1), and the unsigned integer around 4.3 million,
   still too small.
   
   Therefore, use unsigned long to be able to store the number bytes
   without overflow for the foreseeable future. Now we have:
   
       @ira$ ./send okeanos 34141
       start : 1647626064.313421
       close : 1647626074.313503
       done  : 1647626074.317791
       10534190976 bytes in 10.004370 seconds
       1052958954.536867 bytes / seconds
       8423671636.294939 bits  / seconds
       8423671.636295 kBit/s  / seconds
       8423.671636 MBit/s  / seconds
   
   Resolves: mariux64/mariux64-issues#23

   

   pmenzel committed Mar 18, 2022
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