[PATCH rdma-core v3 5/6] tests: Add tests for dma-buf based memory regions
Daniel Vetter
daniel at ffwll.ch
Mon Nov 30 15:00:21 UTC 2020
On Fri, Nov 27, 2020 at 12:55:42PM -0800, Jianxin Xiong wrote:
> Define a set of unit tests similar to regular MR tests and a set of
> tests for send/recv and rdma traffic using dma-buf MRs. Add a utility
> function to generate access flags for dma-buf based MRs because the
> set of supported flags is smaller.
>
> Signed-off-by: Jianxin Xiong <jianxin.xiong at intel.com>
> ---
> tests/test_mr.py | 239 ++++++++++++++++++++++++++++++++++++++++++++++++++++++-
> tests/utils.py | 26 ++++++
> 2 files changed, 264 insertions(+), 1 deletion(-)
>
> diff --git a/tests/test_mr.py b/tests/test_mr.py
> index adc649c..52cf20a 100644
> --- a/tests/test_mr.py
> +++ b/tests/test_mr.py
> @@ -1,5 +1,6 @@
> # SPDX-License-Identifier: (GPL-2.0 OR Linux-OpenIB)
> # Copyright (c) 2019 Mellanox Technologies, Inc. All rights reserved. See COPYING file
> +# Copyright (c) 2020 Intel Corporation. All rights reserved. See COPYING file
> """
> Test module for pyverbs' mr module.
> """
> @@ -9,9 +10,10 @@ import errno
>
> from tests.base import PyverbsAPITestCase, RCResources, RDMATestCase
> from pyverbs.pyverbs_error import PyverbsRDMAError, PyverbsError
> -from pyverbs.mr import MR, MW, DMMR, MWBindInfo, MWBind
> +from pyverbs.mr import MR, MW, DMMR, DmaBufMR, MWBindInfo, MWBind
> from pyverbs.qp import QPCap, QPInitAttr, QPAttr, QP
> from pyverbs.wr import SendWR
> +from pyverbs.dmabuf import DmaBuf
> import pyverbs.device as d
> from pyverbs.pd import PD
> import pyverbs.enums as e
> @@ -366,3 +368,238 @@ class DMMRTest(PyverbsAPITestCase):
> dm_mr = DMMR(pd, dm_mr_len, e.IBV_ACCESS_ZERO_BASED,
> dm=dm, offset=dm_mr_offset)
> dm_mr.close()
> +
> +
> +def check_dmabuf_support():
> + """
> + Check if dma-buf allocation is supported by the system.
> + Skip the test on failure.
> + """
> + try:
> + DmaBuf(1)
Hardcoding gpu unit 1 here (and in other places) is probably not quite
what we want. Not sure what you want to do in the test framework here
instead.
-Daniel
> + except PyverbsRDMAError as ex:
> + if ex.error_code == errno.ENOENT:
> + raise unittest.SkipTest('Device /dev/dri/renderD* is not present')
> + if ex.error_code == errno.EACCES:
> + raise unittest.SkipTest('Lack of permission to access /dev/dri/renderD*')
> +
> +
> +def check_dmabuf_mr_support(pd):
> + """
> + Check if dma-buf MR registration is supported by the driver.
> + Skip the test on failure
> + """
> + try:
> + DmaBufMR(pd, 1, 0)
> + except PyverbsRDMAError as ex:
> + if ex.error_code == errno.EOPNOTSUPP:
> + raise unittest.SkipTest('Reg dma-buf MR is not supported')
> +
> +
> +class DmaBufMRTest(PyverbsAPITestCase):
> + """
> + Test various functionalities of the DmaBufMR class.
> + """
> + def test_dmabuf_reg_mr(self):
> + """
> + Test ibv_reg_dmabuf_mr()
> + """
> + check_dmabuf_support()
> + for ctx, attr, attr_ex in self.devices:
> + with PD(ctx) as pd:
> + check_dmabuf_mr_support(pd)
> + flags = u.get_dmabuf_access_flags(ctx)
> + for f in flags:
> + len = u.get_mr_length()
> + for off in [0, len//2]:
> + with DmaBufMR(pd, len, f, offset=off) as mr:
> + pass
> +
> + def test_dmabuf_dereg_mr(self):
> + """
> + Test ibv_dereg_mr() with DmaBufMR
> + """
> + check_dmabuf_support()
> + for ctx, attr, attr_ex in self.devices:
> + with PD(ctx) as pd:
> + check_dmabuf_mr_support(pd)
> + flags = u.get_dmabuf_access_flags(ctx)
> + for f in flags:
> + len = u.get_mr_length()
> + for off in [0, len//2]:
> + with DmaBufMR(pd, len, f, offset=off) as mr:
> + mr.close()
> +
> + def test_dmabuf_dereg_mr_twice(self):
> + """
> + Verify that explicit call to DmaBufMR's close() doesn't fail
> + """
> + check_dmabuf_support()
> + for ctx, attr, attr_ex in self.devices:
> + with PD(ctx) as pd:
> + check_dmabuf_mr_support(pd)
> + flags = u.get_dmabuf_access_flags(ctx)
> + for f in flags:
> + len = u.get_mr_length()
> + for off in [0, len//2]:
> + with DmaBufMR(pd, len, f, offset=off) as mr:
> + # Pyverbs supports multiple destruction of objects,
> + # we are not expecting an exception here.
> + mr.close()
> + mr.close()
> +
> + def test_dmabuf_reg_mr_bad_flags(self):
> + """
> + Verify that illegal flags combination fails as expected
> + """
> + check_dmabuf_support()
> + for ctx, attr, attr_ex in self.devices:
> + with PD(ctx) as pd:
> + check_dmabuf_mr_support(pd)
> + for i in range(5):
> + flags = random.sample([e.IBV_ACCESS_REMOTE_WRITE,
> + e.IBV_ACCESS_REMOTE_ATOMIC],
> + random.randint(1, 2))
> + mr_flags = 0
> + for i in flags:
> + mr_flags += i.value
> + try:
> + DmaBufMR(pd, u.get_mr_length(), mr_flags)
> + except PyverbsRDMAError as err:
> + assert 'Failed to register a dma-buf MR' in err.args[0]
> + else:
> + raise PyverbsRDMAError('Registered a dma-buf MR with illegal falgs')
> +
> + def test_dmabuf_write(self):
> + """
> + Test writing to DmaBufMR's buffer
> + """
> + check_dmabuf_support()
> + for ctx, attr, attr_ex in self.devices:
> + with PD(ctx) as pd:
> + check_dmabuf_mr_support(pd)
> + for i in range(10):
> + mr_len = u.get_mr_length()
> + flags = u.get_dmabuf_access_flags(ctx)
> + for f in flags:
> + for mr_off in [0, mr_len//2]:
> + with DmaBufMR(pd, mr_len, f, offset=mr_off) as mr:
> + write_len = min(random.randint(1, MAX_IO_LEN),
> + mr_len)
> + mr.write('a' * write_len, write_len)
> +
> + def test_dmabuf_read(self):
> + """
> + Test reading from DmaBufMR's buffer
> + """
> + check_dmabuf_support()
> + for ctx, attr, attr_ex in self.devices:
> + with PD(ctx) as pd:
> + check_dmabuf_mr_support(pd)
> + for i in range(10):
> + mr_len = u.get_mr_length()
> + flags = u.get_dmabuf_access_flags(ctx)
> + for f in flags:
> + for mr_off in [0, mr_len//2]:
> + with DmaBufMR(pd, mr_len, f, offset=mr_off) as mr:
> + write_len = min(random.randint(1, MAX_IO_LEN),
> + mr_len)
> + write_str = 'a' * write_len
> + mr.write(write_str, write_len)
> + read_len = random.randint(1, write_len)
> + offset = random.randint(0, write_len-read_len)
> + read_str = mr.read(read_len, offset).decode()
> + assert read_str in write_str
> +
> + def test_dmabuf_lkey(self):
> + """
> + Test reading lkey property
> + """
> + check_dmabuf_support()
> + for ctx, attr, attr_ex in self.devices:
> + with PD(ctx) as pd:
> + check_dmabuf_mr_support(pd)
> + length = u.get_mr_length()
> + flags = u.get_dmabuf_access_flags(ctx)
> + for f in flags:
> + with DmaBufMR(pd, length, f) as mr:
> + mr.lkey
> +
> + def test_dmabuf_rkey(self):
> + """
> + Test reading rkey property
> + """
> + check_dmabuf_support()
> + for ctx, attr, attr_ex in self.devices:
> + with PD(ctx) as pd:
> + check_dmabuf_mr_support(pd)
> + length = u.get_mr_length()
> + flags = u.get_dmabuf_access_flags(ctx)
> + for f in flags:
> + with DmaBufMR(pd, length, f) as mr:
> + mr.rkey
> +
> +
> +class DmaBufRC(RCResources):
> + def __init__(self, dev_name, ib_port, gid_index):
> + """
> + Initialize an DmaBufRC object.
> + :param dev_name: Device name to be used
> + :param ib_port: IB port of the device to use
> + :param gid_index: Which GID index to use
> + """
> + super(DmaBufRC, self).__init__(dev_name=dev_name, ib_port=ib_port,
> + gid_index=gid_index)
> +
> + def create_mr(self):
> + check_dmabuf_support()
> + check_dmabuf_mr_support(self.pd)
> + access = e.IBV_ACCESS_LOCAL_WRITE | e.IBV_ACCESS_REMOTE_WRITE
> + mr = DmaBufMR(self.pd, self.msg_size, access)
> + self.mr = mr
> +
> + def create_qp_attr(self):
> + qp_attr = QPAttr(port_num=self.ib_port)
> + qp_access = e.IBV_ACCESS_LOCAL_WRITE | e.IBV_ACCESS_REMOTE_WRITE
> + qp_attr.qp_access_flags = qp_access
> + return qp_attr
> +
> +
> +class DmaBufTestCase(RDMATestCase):
> + def setUp(self):
> + super(DmaBufTestCase, self).setUp()
> + self.iters = 100
> +
> + def create_players(self, resource, **resource_arg):
> + """
> + Init dma-buf tests resources.
> + :param resource: The RDMA resources to use. A class of type
> + BaseResources.
> + :param resource_arg: Dict of args that specify the resource specific
> + attributes.
> + :return: The (client, server) resources.
> + """
> + client = resource(**self.dev_info, **resource_arg)
> + server = resource(**self.dev_info, **resource_arg)
> + client.pre_run(server.psns, server.qps_num)
> + server.pre_run(client.psns, client.qps_num)
> + return client, server
> +
> + def test_dmabuf_rc_traffic(self):
> + """
> + Test send/recv using dma-buf MR over RC
> + """
> + client, server = self.create_players(DmaBufRC)
> + u.traffic(client, server, self.iters, self.gid_index, self.ib_port)
> +
> + def test_dmabuf_rdma_traffic(self):
> + """
> + Test rdma write using dma-buf MR
> + """
> + client, server = self.create_players(DmaBufRC)
> + server.rkey = client.mr.rkey
> + server.remote_addr = client.mr.offset
> + client.rkey = server.mr.rkey
> + client.remote_addr = server.mr.offset
> + u.rdma_traffic(client, server, self.iters, self.gid_index, self.ib_port,
> + send_op=e.IBV_WR_RDMA_WRITE)
> diff --git a/tests/utils.py b/tests/utils.py
> index 7039f41..d3d5c16 100644
> --- a/tests/utils.py
> +++ b/tests/utils.py
> @@ -1,5 +1,6 @@
> # SPDX-License-Identifier: (GPL-2.0 OR Linux-OpenIB)
> # Copyright (c) 2019 Mellanox Technologies, Inc. All rights reserved. See COPYING file
> +# Copyright (c) 2020 Intel Corporation. All rights reserved. See COPYING file
> """
> Provide some useful helper function for pyverbs' tests.
> """
> @@ -94,6 +95,31 @@ def get_access_flags(ctx):
> return arr
>
>
> +def get_dmabuf_access_flags(ctx):
> + """
> + Similar to get_access_flags, except that dma-buf MR only support
> + a subset of the flags.
> + :param ctx: Device Context to check capabilities
> + :return: A random legal value for MR flags
> + """
> + attr = ctx.query_device()
> + vals = [e.IBV_ACCESS_LOCAL_WRITE, e.IBV_ACCESS_REMOTE_WRITE,
> + e.IBV_ACCESS_REMOTE_READ, e.IBV_ACCESS_REMOTE_ATOMIC,
> + e.IBV_ACCESS_RELAXED_ORDERING]
> + if not attr.atomic_caps & e.IBV_ATOMIC_HCA:
> + vals.remove(e.IBV_ACCESS_REMOTE_ATOMIC)
> + arr = []
> + for i in range(1, len(vals)):
> + tmp = list(com(vals, i))
> + tmp = filter(filter_illegal_access_flags, tmp)
> + for t in tmp: # Iterate legal combinations and bitwise OR them
> + val = 0
> + for flag in t:
> + val += flag.value
> + arr.append(val)
> + return arr
> +
> +
> def get_dm_attrs(dm_len):
> """
> Initializes an AllocDmAttr member with the given length and random
> --
> 1.8.3.1
>
> _______________________________________________
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> dri-devel at lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel
--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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