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Linux/tools/testing/vsock/

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Name Size Last modified (GMT) Description
Back Parent directory 2024-10-29 14:06:28
File Makefile 1102 bytes 2024-10-29 14:06:28
File README 2421 bytes 2024-10-29 14:06:28
C file control.c 4815 bytes 2024-10-29 14:06:28
C file control.h 495 bytes 2024-10-29 14:06:28
C file msg_zerocopy_common.c 2008 bytes 2024-10-29 14:06:28
C file msg_zerocopy_common.h 358 bytes 2024-10-29 14:06:28
C file timeout.c 1284 bytes 2024-10-29 14:06:28
C file timeout.h 301 bytes 2024-10-29 14:06:28
C file util.c 13751 bytes 2024-10-29 14:06:28
C file util.h 2356 bytes 2024-10-29 14:06:28
C file vsock_diag_test.c 11934 bytes 2024-10-29 14:06:28
C file vsock_perf.c 10284 bytes 2024-10-29 14:06:28
C file vsock_test.c 37109 bytes 2024-10-29 14:06:28
C file vsock_test_zerocopy.c 7658 bytes 2024-10-29 14:06:28
C file vsock_test_zerocopy.h 573 bytes 2024-10-29 14:06:28
C file vsock_uring_test.c 7709 bytes 2024-10-29 14:06:28

  1 AF_VSOCK test suite
  2 -------------------
  3 These tests exercise net/vmw_vsock/ host<->guest sockets for VMware, KVM, and
  4 Hyper-V.
  5 
  6 The following tests are available:
  7 
  8   * vsock_test - core AF_VSOCK socket functionality
  9   * vsock_diag_test - vsock_diag.ko module for listing open sockets
 10 
 11 The following prerequisite steps are not automated and must be performed prior
 12 to running tests:
 13 
 14 1. Build the kernel, make headers_install, and build these tests.
 15 2. Install the kernel and tests on the host.
 16 3. Install the kernel and tests inside the guest.
 17 4. Boot the guest and ensure that the AF_VSOCK transport is enabled.
 18 
 19 Invoke test binaries in both directions as follows:
 20 
 21   # host=server, guest=client
 22   (host)# $TEST_BINARY --mode=server \
 23                        --control-port=1234 \
 24                        --peer-cid=3
 25   (guest)# $TEST_BINARY --mode=client \
 26                         --control-host=$HOST_IP \
 27                         --control-port=1234 \
 28                         --peer-cid=2
 29 
 30   # host=client, guest=server
 31   (guest)# $TEST_BINARY --mode=server \
 32                         --control-port=1234 \
 33                         --peer-cid=2
 34   (host)# $TEST_BINARY --mode=client \
 35                        --control-port=$GUEST_IP \
 36                        --control-port=1234 \
 37                        --peer-cid=3
 38 
 39 vsock_perf utility
 40 -------------------
 41 'vsock_perf' is a simple tool to measure vsock performance. It works in
 42 sender/receiver modes: sender connect to peer at the specified port and
 43 starts data transmission to the receiver. After data processing is done,
 44 it prints several metrics(see below).
 45 
 46 Usage:
 47 # run as sender
 48 # connect to CID 2, port 1234, send 1G of data, tx buf size is 1M
 49 ./vsock_perf --sender 2 --port 1234 --bytes 1G --buf-size 1M
 50 
 51 Output:
 52 tx performance: A Gbits/s
 53 
 54 Output explanation:
 55 A is calculated as "number of bits to send" / "time in tx loop"
 56 
 57 # run as receiver
 58 # listen port 1234, rx buf size is 1M, socket buf size is 1G, SO_RCVLOWAT is 64K
 59 ./vsock_perf --port 1234 --buf-size 1M --vsk-size 1G --rcvlowat 64K
 60 
 61 Output:
 62 rx performance: A Gbits/s
 63 total in 'read()': B sec
 64 POLLIN wakeups: C
 65 average in 'read()': D ns
 66 
 67 Output explanation:
 68 A is calculated as "number of received bits" / "time in rx loop".
 69 B is time, spent in 'read()' system call(excluding 'poll()')
 70 C is number of 'poll()' wake ups with POLLIN bit set.
 71 D is B / C, e.g. average amount of time, spent in single 'read()'.

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