422 lines
16 KiB
Go
422 lines
16 KiB
Go
// Copyright 2019 The Prometheus Authors
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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 procfs
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import (
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"bufio"
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"bytes"
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"fmt"
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"io"
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"strconv"
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"strings"
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"github.com/prometheus/procfs/internal/util"
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)
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// Fscacheinfo represents fscache statistics.
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type Fscacheinfo struct {
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// Number of index cookies allocated
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IndexCookiesAllocated uint64
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// data storage cookies allocated
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DataStorageCookiesAllocated uint64
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// Number of special cookies allocated
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SpecialCookiesAllocated uint64
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// Number of objects allocated
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ObjectsAllocated uint64
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// Number of object allocation failures
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ObjectAllocationsFailure uint64
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// Number of objects that reached the available state
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ObjectsAvailable uint64
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// Number of objects that reached the dead state
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ObjectsDead uint64
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// Number of objects that didn't have a coherency check
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ObjectsWithoutCoherencyCheck uint64
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// Number of objects that passed a coherency check
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ObjectsWithCoherencyCheck uint64
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// Number of objects that needed a coherency data update
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ObjectsNeedCoherencyCheckUpdate uint64
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// Number of objects that were declared obsolete
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ObjectsDeclaredObsolete uint64
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// Number of pages marked as being cached
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PagesMarkedAsBeingCached uint64
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// Number of uncache page requests seen
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UncachePagesRequestSeen uint64
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// Number of acquire cookie requests seen
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AcquireCookiesRequestSeen uint64
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// Number of acq reqs given a NULL parent
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AcquireRequestsWithNullParent uint64
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// Number of acq reqs rejected due to no cache available
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AcquireRequestsRejectedNoCacheAvailable uint64
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// Number of acq reqs succeeded
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AcquireRequestsSucceeded uint64
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// Number of acq reqs rejected due to error
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AcquireRequestsRejectedDueToError uint64
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// Number of acq reqs failed on ENOMEM
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AcquireRequestsFailedDueToEnomem uint64
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// Number of lookup calls made on cache backends
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LookupsNumber uint64
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// Number of negative lookups made
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LookupsNegative uint64
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// Number of positive lookups made
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LookupsPositive uint64
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// Number of objects created by lookup
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ObjectsCreatedByLookup uint64
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// Number of lookups timed out and requeued
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LookupsTimedOutAndRequed uint64
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InvalidationsNumber uint64
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InvalidationsRunning uint64
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// Number of update cookie requests seen
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UpdateCookieRequestSeen uint64
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// Number of upd reqs given a NULL parent
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UpdateRequestsWithNullParent uint64
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// Number of upd reqs granted CPU time
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UpdateRequestsRunning uint64
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// Number of relinquish cookie requests seen
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RelinquishCookiesRequestSeen uint64
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// Number of rlq reqs given a NULL parent
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RelinquishCookiesWithNullParent uint64
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// Number of rlq reqs waited on completion of creation
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RelinquishRequestsWaitingCompleteCreation uint64
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// Relinqs rtr
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RelinquishRetries uint64
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// Number of attribute changed requests seen
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AttributeChangedRequestsSeen uint64
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// Number of attr changed requests queued
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AttributeChangedRequestsQueued uint64
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// Number of attr changed rejected -ENOBUFS
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AttributeChangedRejectDueToEnobufs uint64
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// Number of attr changed failed -ENOMEM
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AttributeChangedFailedDueToEnomem uint64
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// Number of attr changed ops given CPU time
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AttributeChangedOps uint64
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// Number of allocation requests seen
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AllocationRequestsSeen uint64
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// Number of successful alloc reqs
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AllocationOkRequests uint64
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// Number of alloc reqs that waited on lookup completion
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AllocationWaitingOnLookup uint64
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// Number of alloc reqs rejected -ENOBUFS
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AllocationsRejectedDueToEnobufs uint64
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// Number of alloc reqs aborted -ERESTARTSYS
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AllocationsAbortedDueToErestartsys uint64
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// Number of alloc reqs submitted
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AllocationOperationsSubmitted uint64
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// Number of alloc reqs waited for CPU time
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AllocationsWaitedForCPU uint64
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// Number of alloc reqs aborted due to object death
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AllocationsAbortedDueToObjectDeath uint64
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// Number of retrieval (read) requests seen
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RetrievalsReadRequests uint64
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// Number of successful retr reqs
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RetrievalsOk uint64
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// Number of retr reqs that waited on lookup completion
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RetrievalsWaitingLookupCompletion uint64
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// Number of retr reqs returned -ENODATA
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RetrievalsReturnedEnodata uint64
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// Number of retr reqs rejected -ENOBUFS
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RetrievalsRejectedDueToEnobufs uint64
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// Number of retr reqs aborted -ERESTARTSYS
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RetrievalsAbortedDueToErestartsys uint64
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// Number of retr reqs failed -ENOMEM
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RetrievalsFailedDueToEnomem uint64
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// Number of retr reqs submitted
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RetrievalsRequests uint64
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// Number of retr reqs waited for CPU time
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RetrievalsWaitingCPU uint64
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// Number of retr reqs aborted due to object death
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RetrievalsAbortedDueToObjectDeath uint64
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// Number of storage (write) requests seen
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StoreWriteRequests uint64
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// Number of successful store reqs
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StoreSuccessfulRequests uint64
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// Number of store reqs on a page already pending storage
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StoreRequestsOnPendingStorage uint64
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// Number of store reqs rejected -ENOBUFS
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StoreRequestsRejectedDueToEnobufs uint64
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// Number of store reqs failed -ENOMEM
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StoreRequestsFailedDueToEnomem uint64
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// Number of store reqs submitted
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StoreRequestsSubmitted uint64
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// Number of store reqs granted CPU time
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StoreRequestsRunning uint64
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// Number of pages given store req processing time
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StorePagesWithRequestsProcessing uint64
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// Number of store reqs deleted from tracking tree
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StoreRequestsDeleted uint64
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// Number of store reqs over store limit
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StoreRequestsOverStoreLimit uint64
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// Number of release reqs against pages with no pending store
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ReleaseRequestsAgainstPagesWithNoPendingStorage uint64
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// Number of release reqs against pages stored by time lock granted
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ReleaseRequestsAgainstPagesStoredByTimeLockGranted uint64
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// Number of release reqs ignored due to in-progress store
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ReleaseRequestsIgnoredDueToInProgressStore uint64
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// Number of page stores cancelled due to release req
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PageStoresCancelledByReleaseRequests uint64
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VmscanWaiting uint64
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// Number of times async ops added to pending queues
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OpsPending uint64
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// Number of times async ops given CPU time
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OpsRunning uint64
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// Number of times async ops queued for processing
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OpsEnqueued uint64
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// Number of async ops cancelled
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OpsCancelled uint64
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// Number of async ops rejected due to object lookup/create failure
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OpsRejected uint64
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// Number of async ops initialised
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OpsInitialised uint64
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// Number of async ops queued for deferred release
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OpsDeferred uint64
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// Number of async ops released (should equal ini=N when idle)
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OpsReleased uint64
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// Number of deferred-release async ops garbage collected
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OpsGarbageCollected uint64
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// Number of in-progress alloc_object() cache ops
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CacheopAllocationsinProgress uint64
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// Number of in-progress lookup_object() cache ops
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CacheopLookupObjectInProgress uint64
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// Number of in-progress lookup_complete() cache ops
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CacheopLookupCompleteInPorgress uint64
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// Number of in-progress grab_object() cache ops
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CacheopGrabObjectInProgress uint64
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CacheopInvalidations uint64
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// Number of in-progress update_object() cache ops
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CacheopUpdateObjectInProgress uint64
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// Number of in-progress drop_object() cache ops
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CacheopDropObjectInProgress uint64
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// Number of in-progress put_object() cache ops
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CacheopPutObjectInProgress uint64
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// Number of in-progress attr_changed() cache ops
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CacheopAttributeChangeInProgress uint64
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// Number of in-progress sync_cache() cache ops
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CacheopSyncCacheInProgress uint64
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// Number of in-progress read_or_alloc_page() cache ops
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CacheopReadOrAllocPageInProgress uint64
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// Number of in-progress read_or_alloc_pages() cache ops
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CacheopReadOrAllocPagesInProgress uint64
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// Number of in-progress allocate_page() cache ops
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CacheopAllocatePageInProgress uint64
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// Number of in-progress allocate_pages() cache ops
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CacheopAllocatePagesInProgress uint64
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// Number of in-progress write_page() cache ops
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CacheopWritePagesInProgress uint64
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// Number of in-progress uncache_page() cache ops
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CacheopUncachePagesInProgress uint64
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// Number of in-progress dissociate_pages() cache ops
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CacheopDissociatePagesInProgress uint64
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// Number of object lookups/creations rejected due to lack of space
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CacheevLookupsAndCreationsRejectedLackSpace uint64
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// Number of stale objects deleted
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CacheevStaleObjectsDeleted uint64
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// Number of objects retired when relinquished
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CacheevRetiredWhenReliquished uint64
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// Number of objects culled
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CacheevObjectsCulled uint64
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}
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// Fscacheinfo returns information about current fscache statistics.
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// See https://www.kernel.org/doc/Documentation/filesystems/caching/fscache.txt
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func (fs FS) Fscacheinfo() (Fscacheinfo, error) {
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b, err := util.ReadFileNoStat(fs.proc.Path("fs/fscache/stats"))
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if err != nil {
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return Fscacheinfo{}, err
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}
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m, err := parseFscacheinfo(bytes.NewReader(b))
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if err != nil {
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return Fscacheinfo{}, fmt.Errorf("%w: Cannot parse %v: %w", ErrFileParse, m, err)
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}
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return *m, nil
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}
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func setFSCacheFields(fields []string, setFields ...*uint64) error {
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var err error
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if len(fields) < len(setFields) {
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return fmt.Errorf("%w: Expected %d, but got %d: %w", ErrFileParse, len(setFields), len(fields), err)
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}
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for i := range setFields {
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*setFields[i], err = strconv.ParseUint(strings.Split(fields[i], "=")[1], 0, 64)
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if err != nil {
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return err
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}
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}
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return nil
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}
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func parseFscacheinfo(r io.Reader) (*Fscacheinfo, error) {
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var m Fscacheinfo
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s := bufio.NewScanner(r)
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for s.Scan() {
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fields := strings.Fields(s.Text())
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if len(fields) < 2 {
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return nil, fmt.Errorf("%w: malformed Fscacheinfo line: %q", ErrFileParse, s.Text())
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}
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switch fields[0] {
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case "Cookies:":
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err := setFSCacheFields(fields[1:], &m.IndexCookiesAllocated, &m.DataStorageCookiesAllocated,
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&m.SpecialCookiesAllocated)
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if err != nil {
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return &m, err
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}
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case "Objects:":
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err := setFSCacheFields(fields[1:], &m.ObjectsAllocated, &m.ObjectAllocationsFailure,
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&m.ObjectsAvailable, &m.ObjectsDead)
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if err != nil {
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return &m, err
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}
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case "ChkAux":
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err := setFSCacheFields(fields[2:], &m.ObjectsWithoutCoherencyCheck, &m.ObjectsWithCoherencyCheck,
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&m.ObjectsNeedCoherencyCheckUpdate, &m.ObjectsDeclaredObsolete)
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if err != nil {
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return &m, err
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}
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case "Pages":
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err := setFSCacheFields(fields[2:], &m.PagesMarkedAsBeingCached, &m.UncachePagesRequestSeen)
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if err != nil {
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return &m, err
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}
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case "Acquire:":
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err := setFSCacheFields(fields[1:], &m.AcquireCookiesRequestSeen, &m.AcquireRequestsWithNullParent,
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&m.AcquireRequestsRejectedNoCacheAvailable, &m.AcquireRequestsSucceeded, &m.AcquireRequestsRejectedDueToError,
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&m.AcquireRequestsFailedDueToEnomem)
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if err != nil {
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return &m, err
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}
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case "Lookups:":
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err := setFSCacheFields(fields[1:], &m.LookupsNumber, &m.LookupsNegative, &m.LookupsPositive,
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&m.ObjectsCreatedByLookup, &m.LookupsTimedOutAndRequed)
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if err != nil {
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return &m, err
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}
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case "Invals":
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err := setFSCacheFields(fields[2:], &m.InvalidationsNumber, &m.InvalidationsRunning)
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if err != nil {
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return &m, err
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}
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case "Updates:":
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err := setFSCacheFields(fields[1:], &m.UpdateCookieRequestSeen, &m.UpdateRequestsWithNullParent,
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&m.UpdateRequestsRunning)
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if err != nil {
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return &m, err
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}
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case "Relinqs:":
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err := setFSCacheFields(fields[1:], &m.RelinquishCookiesRequestSeen, &m.RelinquishCookiesWithNullParent,
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&m.RelinquishRequestsWaitingCompleteCreation, &m.RelinquishRetries)
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if err != nil {
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return &m, err
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}
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case "AttrChg:":
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err := setFSCacheFields(fields[1:], &m.AttributeChangedRequestsSeen, &m.AttributeChangedRequestsQueued,
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&m.AttributeChangedRejectDueToEnobufs, &m.AttributeChangedFailedDueToEnomem, &m.AttributeChangedOps)
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if err != nil {
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return &m, err
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}
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case "Allocs":
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if strings.Split(fields[2], "=")[0] == "n" {
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err := setFSCacheFields(fields[2:], &m.AllocationRequestsSeen, &m.AllocationOkRequests,
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&m.AllocationWaitingOnLookup, &m.AllocationsRejectedDueToEnobufs, &m.AllocationsAbortedDueToErestartsys)
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if err != nil {
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return &m, err
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}
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} else {
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err := setFSCacheFields(fields[2:], &m.AllocationOperationsSubmitted, &m.AllocationsWaitedForCPU,
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&m.AllocationsAbortedDueToObjectDeath)
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if err != nil {
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return &m, err
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}
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}
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case "Retrvls:":
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if strings.Split(fields[1], "=")[0] == "n" {
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err := setFSCacheFields(fields[1:], &m.RetrievalsReadRequests, &m.RetrievalsOk, &m.RetrievalsWaitingLookupCompletion,
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&m.RetrievalsReturnedEnodata, &m.RetrievalsRejectedDueToEnobufs, &m.RetrievalsAbortedDueToErestartsys,
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&m.RetrievalsFailedDueToEnomem)
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if err != nil {
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return &m, err
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}
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} else {
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err := setFSCacheFields(fields[1:], &m.RetrievalsRequests, &m.RetrievalsWaitingCPU, &m.RetrievalsAbortedDueToObjectDeath)
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if err != nil {
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return &m, err
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}
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}
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case "Stores":
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if strings.Split(fields[2], "=")[0] == "n" {
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err := setFSCacheFields(fields[2:], &m.StoreWriteRequests, &m.StoreSuccessfulRequests,
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&m.StoreRequestsOnPendingStorage, &m.StoreRequestsRejectedDueToEnobufs, &m.StoreRequestsFailedDueToEnomem)
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if err != nil {
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return &m, err
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}
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} else {
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err := setFSCacheFields(fields[2:], &m.StoreRequestsSubmitted, &m.StoreRequestsRunning,
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&m.StorePagesWithRequestsProcessing, &m.StoreRequestsDeleted, &m.StoreRequestsOverStoreLimit)
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if err != nil {
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return &m, err
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}
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}
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case "VmScan":
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err := setFSCacheFields(fields[2:], &m.ReleaseRequestsAgainstPagesWithNoPendingStorage,
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&m.ReleaseRequestsAgainstPagesStoredByTimeLockGranted, &m.ReleaseRequestsIgnoredDueToInProgressStore,
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&m.PageStoresCancelledByReleaseRequests, &m.VmscanWaiting)
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if err != nil {
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return &m, err
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}
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case "Ops":
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if strings.Split(fields[2], "=")[0] == "pend" {
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err := setFSCacheFields(fields[2:], &m.OpsPending, &m.OpsRunning, &m.OpsEnqueued, &m.OpsCancelled, &m.OpsRejected)
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if err != nil {
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return &m, err
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}
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} else {
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err := setFSCacheFields(fields[2:], &m.OpsInitialised, &m.OpsDeferred, &m.OpsReleased, &m.OpsGarbageCollected)
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if err != nil {
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return &m, err
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}
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}
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case "CacheOp:":
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if strings.Split(fields[1], "=")[0] == "alo" {
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err := setFSCacheFields(fields[1:], &m.CacheopAllocationsinProgress, &m.CacheopLookupObjectInProgress,
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&m.CacheopLookupCompleteInPorgress, &m.CacheopGrabObjectInProgress)
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if err != nil {
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return &m, err
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}
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} else if strings.Split(fields[1], "=")[0] == "inv" {
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err := setFSCacheFields(fields[1:], &m.CacheopInvalidations, &m.CacheopUpdateObjectInProgress,
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&m.CacheopDropObjectInProgress, &m.CacheopPutObjectInProgress, &m.CacheopAttributeChangeInProgress,
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&m.CacheopSyncCacheInProgress)
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if err != nil {
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return &m, err
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}
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} else {
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err := setFSCacheFields(fields[1:], &m.CacheopReadOrAllocPageInProgress, &m.CacheopReadOrAllocPagesInProgress,
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&m.CacheopAllocatePageInProgress, &m.CacheopAllocatePagesInProgress, &m.CacheopWritePagesInProgress,
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&m.CacheopUncachePagesInProgress, &m.CacheopDissociatePagesInProgress)
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if err != nil {
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return &m, err
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}
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}
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case "CacheEv:":
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err := setFSCacheFields(fields[1:], &m.CacheevLookupsAndCreationsRejectedLackSpace, &m.CacheevStaleObjectsDeleted,
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&m.CacheevRetiredWhenReliquished, &m.CacheevObjectsCulled)
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if err != nil {
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return &m, err
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}
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}
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}
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return &m, nil
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}
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