Skip to content
Jump to bottom

Add send benchmark #238

Open
wants to merge 5 commits into
base: master
Choose a base branch
from
Open

Add send benchmark #238

wants to merge 5 commits into from

Commits on Mar 18, 2022

  1. send: Add network bandwidth benchmark 

    Copy from `~buczek/src/small/send.c`.
    @donald @pmenzel
    donald authored and pmenzel committed Mar 18, 2022
    Configuration menu
    Copy the full SHA
    8f6938f View commit details
    Browse the repository at this point in the history

  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
    pmenzel committed Mar 18, 2022
    Configuration menu
    Copy the full SHA
    d7f0aa3 View commit details
    Browse the repository at this point in the history

  3. send: Strip trailing spaces

    @pmenzel
    pmenzel committed Mar 18, 2022
    Configuration menu
    Copy the full SHA
    907197f View commit details
    Browse the repository at this point in the history

  4. send: Build, track and install executable 

    Build with `make send`, add it to the git archive, and install it to
`/usr/bin`.
    @pmenzel
    pmenzel committed Mar 18, 2022
    Configuration menu
    Copy the full SHA
    a842a94 View commit details
    Browse the repository at this point in the history

  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
    pmenzel committed Mar 18, 2022
    Configuration menu
    Copy the full SHA
    08e1a93 View commit details
    Browse the repository at this point in the history