mirror of
https://github.com/matrix-construct/construct
synced 2024-06-30 07:48:22 +02:00
103 lines
3.6 KiB
C++
103 lines
3.6 KiB
C++
// The Construct
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//
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// Copyright (C) The Construct Developers, Authors & Contributors
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// Copyright (C) 2016-2022 Jason Volk <jason@zemos.net>
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice is present in all copies. The
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// full license for this software is available in the LICENSE file.
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#pragma once
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#define HAVE_IRCD_CL_EXEC_H
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/// Construction enqueues the task; destruction waits for completion.
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///
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/// clEnqueue* construction with resulting cl_event wrapping. Instances
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/// represent the full lifecycle of work creation, submission and completion.
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///
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/// Our interface is tied directly to ircd::ctx for intuitive control flow and
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/// interaction with the device. By default, all constructions are dependent
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/// on the last construction made on the same ircd::ctx, providing sequential
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/// consistency for each ircd::ctx, and independence between different ctxs.
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/// Each instance destructs only when complete, otherwise the ircd::ctx will
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/// block in the destructor.
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struct ircd::cl::exec
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:work
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{
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struct opts;
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static const opts opts_default;
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// Copy data written by the device to the GTT into our buffer.
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exec(data &, const std::memory_order, const opts & = opts_default);
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// Copy data directly between buffers.
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exec(data &, const data &, const opts & = opts_default);
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// Execute a kernel on a range.
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exec(kern &, const kern::range &, const opts & = opts_default);
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// Execute a kernel on a range.
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exec(kern &, const opts &, const kern::range &);
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// Execute a barrier.
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exec(const opts &);
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// No-op
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exec() = default;
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};
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/// Options for an exec.
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struct ircd::cl::exec::opts
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{
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/// Specify a list of dependencies. When provided, this list overrides the
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/// default sequential behavior; thus can be used to start new dependency
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/// chains for some task concurrency on the same ircd::ctx. Providing a
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/// single reference to the last exec on the same stack is equivalent to
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/// the default.
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vector_view<cl::exec> deps;
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/// For operations which have a size; otherwise ignored, or serves as
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/// sentinel for automatic size.
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size_t size {-1UL};
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/// For operations which have an offset (or two); otherwise ignored.
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off_t offset[2] {0};
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/// Tune the intensity of the execution. The value is intended to correlate
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/// with parallel resource consumption on the device by shaping the work
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/// groups submitted over the range. The minimum value of 1 will serialize
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/// execution. Values greater than the number of CU's will not increase
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/// concurrency but may still partition a large range with multiple command
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/// submissions to increase niceness. The default of zero will maximize
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/// intensity and minimize command submissions (to one).
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uint intensity {0};
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/// Starts a new dependency chain; allowing empty deps without implicit
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/// dependency on the last work item constructed on the ircd::ctx.
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bool indep {false};
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/// For operations that have an optional blocking behavior; otherwise
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/// ignored. Note that this is a thread-level blocking mechanism and
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/// does not yield the ircd::ctx; for testing/special use only.
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bool blocking {false};
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/// Perform a flush of the queue directly after submit.
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bool flush {false};
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/// Perform a sync of the queue directly after submit; this will block in
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/// the ctor; all work will be complete at full construction.
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bool sync {false};
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};
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inline
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ircd::cl::exec::exec(kern &kern,
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const opts &opts,
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const kern::range &range)
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:exec
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{
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kern, range, opts
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}
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{}
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