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https://github.com/hanzoai/visor.git
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Luis Capelo
aa9030c7fe
GPU profilers (Nsight Systems/CUPTI) build their trace timeline from CLOCK_MONOTONIC_RAW. gVisor serves CLOCK_MONOTONIC_RAW as an alias of CLOCK_MONOTONIC, this will drift from CLOCK_MONOTONIC_RAW breaking profiling. When nvproxy is enabled with `capProfiling`, this change exposes CLOCK_MONOTONIC_RAW as a clock distinct from CLOCK_MONOTONIC that tracks the host's CLOCK_MONOTONIC_RAW (absolute, unadjusted). CLOCK_MONOTONIC is unchanged. When profiling is disabled, CLOCK_MONOTONIC_RAW continues to alias CLOCK_MONOTONIC as before.
56 lines
2.0 KiB
Go
56 lines
2.0 KiB
Go
// Copyright 2018 The gVisor Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package time
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// UpdateResult holds the timekeeping parameters produced by Clocks.Update.
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//
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// Each *Ok field reports whether the corresponding *Params were successfully
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// calibrated and may be published to the VDSO. MonotonicRaw is only populated
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// by clock sources that track a distinct CLOCK_MONOTONIC_RAW; otherwise
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// MonotonicRawOk is false.
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type UpdateResult struct {
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Monotonic Parameters
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MonotonicOk bool
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Realtime Parameters
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RealtimeOk bool
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MonotonicRaw Parameters
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MonotonicRawOk bool
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}
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// Clocks represents a clock source that contains both a monotonic and realtime
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// clock.
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type Clocks interface {
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// Update performs an update step, keeping the clocks in sync with the
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// reference host clocks, and returning the new timekeeping parameters.
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//
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// Update should be called at approximately ApproxUpdateInterval.
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//
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// parked indicates that the clock was not read for at least ApproxUpdateInterval
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Update(parked bool) UpdateResult
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// GetTime returns the current time in nanoseconds for the given clock.
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//
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// Clocks implementations must support at least Monotonic and
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// Realtime.
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GetTime(c ClockID) (int64, error)
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// MonotonicRawEnabled reports whether this clock source tracks a distinct
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// CLOCK_MONOTONIC_RAW, i.e. whether GetTime(MonotonicRaw) returns the
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// host's absolute CLOCK_MONOTONIC_RAW rather than aliasing Monotonic.
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//
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// It must return the same value for the lifetime of the Clocks.
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MonotonicRawEnabled() bool
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}
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