# [OmniOS-discuss] Slow ssh transfers

Dale Ghent daleg at omniti.com
Wed Oct 12 16:34:07 UTC 2016

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    > On Oct 12, 2016, at 12:05 PM, Martin Waldenvik <waldenvik at gmx.com> wrote:
    >
    > omnios - ./openssl speed -elapsed -evp aes-256-gcm
    >
    > The 'numbers' are in 1000s of bytes per second processed.
    > type        16 bytes     64 bytes    256 bytes   1024 bytes   8192 bytes
    > aes-256-gcm 36546.42k    39239.49k    39289.51k    39519.91k  39613.78k
    >
    > freebsd - ./openssl speed -elapsed -evp aes-256-gcm
    >
    > The 'numbers' are in 1000s of bytes per second processed.
    > type        16 bytes    64 bytes    256 bytes   1024 bytes   8192 bytes
    > aes-256-gcm 222688.71k  638351.04k  889610.92k  993149.57k   1017445.72k
    >

    That's still quite slow on the OmniOS box. On a 3.5GHz Haswell-E (E3-1241 v3) I get:

    type             16 bytes     64 bytes    256 bytes   1024 bytes   8192 bytes
    aes-256-gcm     394656.68k  1001238.31k  2094818.99k  2407235.93k  2689916.93k

    Perhaps you may want to check the BIOS settings of your OmniOS box and ensure that "AES-NI Instructions" are turned on. Your hardware vendor might have that termed differently - AES Acceleration and such.

    /dale

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