On Wed, 22 May 2019 22:56:07 +0000 Sunil Muthuswamy <sunilmut@xxxxxxxxxxxxx> wrote: > Currently, the hv_sock buffer size is static and can't scale to the > bandwidth requirements of the application. This change allows the > applications to influence the socket buffer sizes using the SO_SNDBUF and > the SO_RCVBUF socket options. > > Few interesting points to note: > 1. Since the VMBUS does not allow a resize operation of the ring size, the > socket buffer size option should be set prior to establishing the > connection for it to take effect. > 2. Setting the socket option comes with the cost of that much memory being > reserved/allocated by the kernel, for the lifetime of the connection. > > Perf data: > Total Data Transfer: 1GB > Single threaded reader/writer > Results below are summarized over 10 iterations. > > Linux hvsocket writer + Windows hvsocket reader: > |---------------------------------------------------------------------------------------------| > |Packet size -> | 128B | 1KB | 4KB | 64KB | > |---------------------------------------------------------------------------------------------| > |SO_SNDBUF size | | Throughput in MB/s (min/max/avg/median): | > | v | | > |---------------------------------------------------------------------------------------------| > | Default | 109/118/114/116 | 636/774/701/700 | 435/507/480/476 | 410/491/462/470 | > | 16KB | 110/116/112/111 | 575/705/662/671 | 749/900/854/869 | 592/824/692/676 | > | 32KB | 108/120/115/115 | 703/823/767/772 | 718/878/850/866 | 1593/2124/2000/2085 | > | 64KB | 108/119/114/114 | 592/732/683/688 | 805/934/903/911 | 1784/1943/1862/1843 | > |---------------------------------------------------------------------------------------------| > > Windows hvsocket writer + Linux hvsocket reader: > |---------------------------------------------------------------------------------------------| > |Packet size -> | 128B | 1KB | 4KB | 64KB | > |---------------------------------------------------------------------------------------------| > |SO_RCVBUF size | | Throughput in MB/s (min/max/avg/median): | > | v | | > |---------------------------------------------------------------------------------------------| > | Default | 69/82/75/73 | 313/343/333/336 | 418/477/446/445 | 659/701/676/678 | > | 16KB | 69/83/76/77 | 350/401/375/382 | 506/548/517/516 | 602/624/615/615 | > | 32KB | 62/83/73/73 | 471/529/496/494 | 830/1046/935/939 | 944/1180/1070/1100 | > | 64KB | 64/70/68/69 | 467/533/501/497 | 1260/1590/1430/1431 | 1605/1819/1670/1660 | > |---------------------------------------------------------------------------------------------| > > Signed-off-by: Sunil Muthuswamy <sunilmut@xxxxxxxxxxxxx> It looks like Exchange mangled you patch. It doesn't apply clean. >
