mirror of
https://github.com/netbirdio/gvisor.git
synced 2026-05-22 17:12:49 -07:00
Michael Pratt
4d52a55201
Based on the guidelines at https://opensource.google.com/docs/releasing/authors/. 1. $ rg -l "Google LLC" | xargs sed -i 's/Google LLC.*/The gVisor Authors./' 2. Manual fixup of "Google Inc" references. 3. Add AUTHORS file. Authors may request to be added to this file. 4. Point netstack AUTHORS to gVisor AUTHORS. Drop CONTRIBUTORS. Fixes #209 PiperOrigin-RevId: 245823212 Change-Id: I64530b24ad021a7d683137459cafc510f5ee1de9
91 lines
2.7 KiB
Go
91 lines
2.7 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 usage
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import (
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"sync/atomic"
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)
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// IO contains I/O-related statistics.
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//
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// +stateify savable
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type IO struct {
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// CharsRead is the number of bytes read by read syscalls.
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CharsRead uint64
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// CharsWritten is the number of bytes written by write syscalls.
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CharsWritten uint64
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// ReadSyscalls is the number of read syscalls.
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ReadSyscalls uint64
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// WriteSyscalls is the number of write syscalls.
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WriteSyscalls uint64
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// The following counter is only meaningful when Sentry has internal
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// pagecache.
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// BytesRead is the number of bytes actually read into pagecache.
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BytesRead uint64
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// BytesWritten is the number of bytes actually written from pagecache.
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BytesWritten uint64
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// BytesWriteCancelled is the number of bytes not written out due to
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// truncation.
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BytesWriteCancelled uint64
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}
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// AccountReadSyscall does the accounting for a read syscall.
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func (i *IO) AccountReadSyscall(bytes int64) {
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atomic.AddUint64(&i.ReadSyscalls, 1)
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if bytes > 0 {
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atomic.AddUint64(&i.CharsRead, uint64(bytes))
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}
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}
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// AccountWriteSyscall does the accounting for a write syscall.
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func (i *IO) AccountWriteSyscall(bytes int64) {
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atomic.AddUint64(&i.WriteSyscalls, 1)
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if bytes > 0 {
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atomic.AddUint64(&i.CharsWritten, uint64(bytes))
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}
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}
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// AccountReadIO does the accounting for a read IO into the file system.
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func (i *IO) AccountReadIO(bytes int64) {
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if bytes > 0 {
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atomic.AddUint64(&i.BytesRead, uint64(bytes))
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}
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}
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// AccountWriteIO does the accounting for a write IO into the file system.
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func (i *IO) AccountWriteIO(bytes int64) {
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if bytes > 0 {
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atomic.AddUint64(&i.BytesWritten, uint64(bytes))
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}
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}
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// Accumulate adds up io usages.
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func (i *IO) Accumulate(io *IO) {
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atomic.AddUint64(&i.CharsRead, atomic.LoadUint64(&io.CharsRead))
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atomic.AddUint64(&i.CharsWritten, atomic.LoadUint64(&io.CharsWritten))
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atomic.AddUint64(&i.ReadSyscalls, atomic.LoadUint64(&io.ReadSyscalls))
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atomic.AddUint64(&i.WriteSyscalls, atomic.LoadUint64(&io.WriteSyscalls))
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atomic.AddUint64(&i.BytesRead, atomic.LoadUint64(&io.BytesRead))
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atomic.AddUint64(&i.BytesWritten, atomic.LoadUint64(&io.BytesWritten))
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atomic.AddUint64(&i.BytesWriteCancelled, atomic.LoadUint64(&io.BytesWriteCancelled))
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}
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