diff options
Diffstat (limited to 'vendor/github.com/prometheus/procfs/fscache.go')
| -rw-r--r-- | vendor/github.com/prometheus/procfs/fscache.go | 422 |
1 files changed, 422 insertions, 0 deletions
diff --git a/vendor/github.com/prometheus/procfs/fscache.go b/vendor/github.com/prometheus/procfs/fscache.go new file mode 100644 index 000000000..8783cf3cc --- /dev/null +++ b/vendor/github.com/prometheus/procfs/fscache.go @@ -0,0 +1,422 @@ +// Copyright 2019 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package procfs + +import ( + "bufio" + "bytes" + "fmt" + "io" + "strconv" + "strings" + + "github.com/prometheus/procfs/internal/util" +) + +// Fscacheinfo represents fscache statistics. +type Fscacheinfo struct { + // Number of index cookies allocated + IndexCookiesAllocated uint64 + // data storage cookies allocated + DataStorageCookiesAllocated uint64 + // Number of special cookies allocated + SpecialCookiesAllocated uint64 + // Number of objects allocated + ObjectsAllocated uint64 + // Number of object allocation failures + ObjectAllocationsFailure uint64 + // Number of objects that reached the available state + ObjectsAvailable uint64 + // Number of objects that reached the dead state + ObjectsDead uint64 + // Number of objects that didn't have a coherency check + ObjectsWithoutCoherencyCheck uint64 + // Number of objects that passed a coherency check + ObjectsWithCoherencyCheck uint64 + // Number of objects that needed a coherency data update + ObjectsNeedCoherencyCheckUpdate uint64 + // Number of objects that were declared obsolete + ObjectsDeclaredObsolete uint64 + // Number of pages marked as being cached + PagesMarkedAsBeingCached uint64 + // Number of uncache page requests seen + UncachePagesRequestSeen uint64 + // Number of acquire cookie requests seen + AcquireCookiesRequestSeen uint64 + // Number of acq reqs given a NULL parent + AcquireRequestsWithNullParent uint64 + // Number of acq reqs rejected due to no cache available + AcquireRequestsRejectedNoCacheAvailable uint64 + // Number of acq reqs succeeded + AcquireRequestsSucceeded uint64 + // Number of acq reqs rejected due to error + AcquireRequestsRejectedDueToError uint64 + // Number of acq reqs failed on ENOMEM + AcquireRequestsFailedDueToEnomem uint64 + // Number of lookup calls made on cache backends + LookupsNumber uint64 + // Number of negative lookups made + LookupsNegative uint64 + // Number of positive lookups made + LookupsPositive uint64 + // Number of objects created by lookup + ObjectsCreatedByLookup uint64 + // Number of lookups timed out and requeued + LookupsTimedOutAndRequed uint64 + InvalidationsNumber uint64 + InvalidationsRunning uint64 + // Number of update cookie requests seen + UpdateCookieRequestSeen uint64 + // Number of upd reqs given a NULL parent + UpdateRequestsWithNullParent uint64 + // Number of upd reqs granted CPU time + UpdateRequestsRunning uint64 + // Number of relinquish cookie requests seen + RelinquishCookiesRequestSeen uint64 + // Number of rlq reqs given a NULL parent + RelinquishCookiesWithNullParent uint64 + // Number of rlq reqs waited on completion of creation + RelinquishRequestsWaitingCompleteCreation uint64 + // Relinqs rtr + RelinquishRetries uint64 + // Number of attribute changed requests seen + AttributeChangedRequestsSeen uint64 + // Number of attr changed requests queued + AttributeChangedRequestsQueued uint64 + // Number of attr changed rejected -ENOBUFS + AttributeChangedRejectDueToEnobufs uint64 + // Number of attr changed failed -ENOMEM + AttributeChangedFailedDueToEnomem uint64 + // Number of attr changed ops given CPU time + AttributeChangedOps uint64 + // Number of allocation requests seen + AllocationRequestsSeen uint64 + // Number of successful alloc reqs + AllocationOkRequests uint64 + // Number of alloc reqs that waited on lookup completion + AllocationWaitingOnLookup uint64 + // Number of alloc reqs rejected -ENOBUFS + AllocationsRejectedDueToEnobufs uint64 + // Number of alloc reqs aborted -ERESTARTSYS + AllocationsAbortedDueToErestartsys uint64 + // Number of alloc reqs submitted + AllocationOperationsSubmitted uint64 + // Number of alloc reqs waited for CPU time + AllocationsWaitedForCPU uint64 + // Number of alloc reqs aborted due to object death + AllocationsAbortedDueToObjectDeath uint64 + // Number of retrieval (read) requests seen + RetrievalsReadRequests uint64 + // Number of successful retr reqs + RetrievalsOk uint64 + // Number of retr reqs that waited on lookup completion + RetrievalsWaitingLookupCompletion uint64 + // Number of retr reqs returned -ENODATA + RetrievalsReturnedEnodata uint64 + // Number of retr reqs rejected -ENOBUFS + RetrievalsRejectedDueToEnobufs uint64 + // Number of retr reqs aborted -ERESTARTSYS + RetrievalsAbortedDueToErestartsys uint64 + // Number of retr reqs failed -ENOMEM + RetrievalsFailedDueToEnomem uint64 + // Number of retr reqs submitted + RetrievalsRequests uint64 + // Number of retr reqs waited for CPU time + RetrievalsWaitingCPU uint64 + // Number of retr reqs aborted due to object death + RetrievalsAbortedDueToObjectDeath uint64 + // Number of storage (write) requests seen + StoreWriteRequests uint64 + // Number of successful store reqs + StoreSuccessfulRequests uint64 + // Number of store reqs on a page already pending storage + StoreRequestsOnPendingStorage uint64 + // Number of store reqs rejected -ENOBUFS + StoreRequestsRejectedDueToEnobufs uint64 + // Number of store reqs failed -ENOMEM + StoreRequestsFailedDueToEnomem uint64 + // Number of store reqs submitted + StoreRequestsSubmitted uint64 + // Number of store reqs granted CPU time + StoreRequestsRunning uint64 + // Number of pages given store req processing time + StorePagesWithRequestsProcessing uint64 + // Number of store reqs deleted from tracking tree + StoreRequestsDeleted uint64 + // Number of store reqs over store limit + StoreRequestsOverStoreLimit uint64 + // Number of release reqs against pages with no pending store + ReleaseRequestsAgainstPagesWithNoPendingStorage uint64 + // Number of release reqs against pages stored by time lock granted + ReleaseRequestsAgainstPagesStoredByTimeLockGranted uint64 + // Number of release reqs ignored due to in-progress store + ReleaseRequestsIgnoredDueToInProgressStore uint64 + // Number of page stores cancelled due to release req + PageStoresCancelledByReleaseRequests uint64 + VmscanWaiting uint64 + // Number of times async ops added to pending queues + OpsPending uint64 + // Number of times async ops given CPU time + OpsRunning uint64 + // Number of times async ops queued for processing + OpsEnqueued uint64 + // Number of async ops cancelled + OpsCancelled uint64 + // Number of async ops rejected due to object lookup/create failure + OpsRejected uint64 + // Number of async ops initialised + OpsInitialised uint64 + // Number of async ops queued for deferred release + OpsDeferred uint64 + // Number of async ops released (should equal ini=N when idle) + OpsReleased uint64 + // Number of deferred-release async ops garbage collected + OpsGarbageCollected uint64 + // Number of in-progress alloc_object() cache ops + CacheopAllocationsinProgress uint64 + // Number of in-progress lookup_object() cache ops + CacheopLookupObjectInProgress uint64 + // Number of in-progress lookup_complete() cache ops + CacheopLookupCompleteInPorgress uint64 + // Number of in-progress grab_object() cache ops + CacheopGrabObjectInProgress uint64 + CacheopInvalidations uint64 + // Number of in-progress update_object() cache ops + CacheopUpdateObjectInProgress uint64 + // Number of in-progress drop_object() cache ops + CacheopDropObjectInProgress uint64 + // Number of in-progress put_object() cache ops + CacheopPutObjectInProgress uint64 + // Number of in-progress attr_changed() cache ops + CacheopAttributeChangeInProgress uint64 + // Number of in-progress sync_cache() cache ops + CacheopSyncCacheInProgress uint64 + // Number of in-progress read_or_alloc_page() cache ops + CacheopReadOrAllocPageInProgress uint64 + // Number of in-progress read_or_alloc_pages() cache ops + CacheopReadOrAllocPagesInProgress uint64 + // Number of in-progress allocate_page() cache ops + CacheopAllocatePageInProgress uint64 + // Number of in-progress allocate_pages() cache ops + CacheopAllocatePagesInProgress uint64 + // Number of in-progress write_page() cache ops + CacheopWritePagesInProgress uint64 + // Number of in-progress uncache_page() cache ops + CacheopUncachePagesInProgress uint64 + // Number of in-progress dissociate_pages() cache ops + CacheopDissociatePagesInProgress uint64 + // Number of object lookups/creations rejected due to lack of space + CacheevLookupsAndCreationsRejectedLackSpace uint64 + // Number of stale objects deleted + CacheevStaleObjectsDeleted uint64 + // Number of objects retired when relinquished + CacheevRetiredWhenReliquished uint64 + // Number of objects culled + CacheevObjectsCulled uint64 +} + +// Fscacheinfo returns information about current fscache statistics. +// See https://www.kernel.org/doc/Documentation/filesystems/caching/fscache.txt +func (fs FS) Fscacheinfo() (Fscacheinfo, error) { + b, err := util.ReadFileNoStat(fs.proc.Path("fs/fscache/stats")) + if err != nil { + return Fscacheinfo{}, err + } + + m, err := parseFscacheinfo(bytes.NewReader(b)) + if err != nil { + return Fscacheinfo{}, fmt.Errorf("failed to parse Fscacheinfo: %v", err) + } + + return *m, nil +} + +func setFSCacheFields(fields []string, setFields ...*uint64) error { + var err error + if len(fields) < len(setFields) { + return fmt.Errorf("Insufficient number of fields, expected %v, got %v", len(setFields), len(fields)) + } + + for i := range setFields { + *setFields[i], err = strconv.ParseUint(strings.Split(fields[i], "=")[1], 0, 64) + if err != nil { + return err + } + } + return nil +} + +func parseFscacheinfo(r io.Reader) (*Fscacheinfo, error) { + var m Fscacheinfo + s := bufio.NewScanner(r) + for s.Scan() { + fields := strings.Fields(s.Text()) + if len(fields) < 2 { + return nil, fmt.Errorf("malformed Fscacheinfo line: %q", s.Text()) + } + + switch fields[0] { + case "Cookies:": + err := setFSCacheFields(fields[1:], &m.IndexCookiesAllocated, &m.DataStorageCookiesAllocated, + &m.SpecialCookiesAllocated) + if err != nil { + return &m, err + } + case "Objects:": + err := setFSCacheFields(fields[1:], &m.ObjectsAllocated, &m.ObjectAllocationsFailure, + &m.ObjectsAvailable, &m.ObjectsDead) + if err != nil { + return &m, err + } + case "ChkAux": + err := setFSCacheFields(fields[2:], &m.ObjectsWithoutCoherencyCheck, &m.ObjectsWithCoherencyCheck, + &m.ObjectsNeedCoherencyCheckUpdate, &m.ObjectsDeclaredObsolete) + if err != nil { + return &m, err + } + case "Pages": + err := setFSCacheFields(fields[2:], &m.PagesMarkedAsBeingCached, &m.UncachePagesRequestSeen) + if err != nil { + return &m, err + } + case "Acquire:": + err := setFSCacheFields(fields[1:], &m.AcquireCookiesRequestSeen, &m.AcquireRequestsWithNullParent, + &m.AcquireRequestsRejectedNoCacheAvailable, &m.AcquireRequestsSucceeded, &m.AcquireRequestsRejectedDueToError, + &m.AcquireRequestsFailedDueToEnomem) + if err != nil { + return &m, err + } + case "Lookups:": + err := setFSCacheFields(fields[1:], &m.LookupsNumber, &m.LookupsNegative, &m.LookupsPositive, + &m.ObjectsCreatedByLookup, &m.LookupsTimedOutAndRequed) + if err != nil { + return &m, err + } + case "Invals": + err := setFSCacheFields(fields[2:], &m.InvalidationsNumber, &m.InvalidationsRunning) + if err != nil { + return &m, err + } + case "Updates:": + err := setFSCacheFields(fields[1:], &m.UpdateCookieRequestSeen, &m.UpdateRequestsWithNullParent, + &m.UpdateRequestsRunning) + if err != nil { + return &m, err + } + case "Relinqs:": + err := setFSCacheFields(fields[1:], &m.RelinquishCookiesRequestSeen, &m.RelinquishCookiesWithNullParent, + &m.RelinquishRequestsWaitingCompleteCreation, &m.RelinquishRetries) + if err != nil { + return &m, err + } + case "AttrChg:": + err := setFSCacheFields(fields[1:], &m.AttributeChangedRequestsSeen, &m.AttributeChangedRequestsQueued, + &m.AttributeChangedRejectDueToEnobufs, &m.AttributeChangedFailedDueToEnomem, &m.AttributeChangedOps) + if err != nil { + return &m, err + } + case "Allocs": + if strings.Split(fields[2], "=")[0] == "n" { + err := setFSCacheFields(fields[2:], &m.AllocationRequestsSeen, &m.AllocationOkRequests, + &m.AllocationWaitingOnLookup, &m.AllocationsRejectedDueToEnobufs, &m.AllocationsAbortedDueToErestartsys) + if err != nil { + return &m, err + } + } else { + err := setFSCacheFields(fields[2:], &m.AllocationOperationsSubmitted, &m.AllocationsWaitedForCPU, + &m.AllocationsAbortedDueToObjectDeath) + if err != nil { + return &m, err + } + } + case "Retrvls:": + if strings.Split(fields[1], "=")[0] == "n" { + err := setFSCacheFields(fields[1:], &m.RetrievalsReadRequests, &m.RetrievalsOk, &m.RetrievalsWaitingLookupCompletion, + &m.RetrievalsReturnedEnodata, &m.RetrievalsRejectedDueToEnobufs, &m.RetrievalsAbortedDueToErestartsys, + &m.RetrievalsFailedDueToEnomem) + if err != nil { + return &m, err + } + } else { + err := setFSCacheFields(fields[1:], &m.RetrievalsRequests, &m.RetrievalsWaitingCPU, &m.RetrievalsAbortedDueToObjectDeath) + if err != nil { + return &m, err + } + } + case "Stores": + if strings.Split(fields[2], "=")[0] == "n" { + err := setFSCacheFields(fields[2:], &m.StoreWriteRequests, &m.StoreSuccessfulRequests, + &m.StoreRequestsOnPendingStorage, &m.StoreRequestsRejectedDueToEnobufs, &m.StoreRequestsFailedDueToEnomem) + if err != nil { + return &m, err + } + } else { + err := setFSCacheFields(fields[2:], &m.StoreRequestsSubmitted, &m.StoreRequestsRunning, + &m.StorePagesWithRequestsProcessing, &m.StoreRequestsDeleted, &m.StoreRequestsOverStoreLimit) + if err != nil { + return &m, err + } + } + case "VmScan": + err := setFSCacheFields(fields[2:], &m.ReleaseRequestsAgainstPagesWithNoPendingStorage, + &m.ReleaseRequestsAgainstPagesStoredByTimeLockGranted, &m.ReleaseRequestsIgnoredDueToInProgressStore, + &m.PageStoresCancelledByReleaseRequests, &m.VmscanWaiting) + if err != nil { + return &m, err + } + case "Ops": + if strings.Split(fields[2], "=")[0] == "pend" { + err := setFSCacheFields(fields[2:], &m.OpsPending, &m.OpsRunning, &m.OpsEnqueued, &m.OpsCancelled, &m.OpsRejected) + if err != nil { + return &m, err + } + } else { + err := setFSCacheFields(fields[2:], &m.OpsInitialised, &m.OpsDeferred, &m.OpsReleased, &m.OpsGarbageCollected) + if err != nil { + return &m, err + } + } + case "CacheOp:": + if strings.Split(fields[1], "=")[0] == "alo" { + err := setFSCacheFields(fields[1:], &m.CacheopAllocationsinProgress, &m.CacheopLookupObjectInProgress, + &m.CacheopLookupCompleteInPorgress, &m.CacheopGrabObjectInProgress) + if err != nil { + return &m, err + } + } else if strings.Split(fields[1], "=")[0] == "inv" { + err := setFSCacheFields(fields[1:], &m.CacheopInvalidations, &m.CacheopUpdateObjectInProgress, + &m.CacheopDropObjectInProgress, &m.CacheopPutObjectInProgress, &m.CacheopAttributeChangeInProgress, + &m.CacheopSyncCacheInProgress) + if err != nil { + return &m, err + } + } else { + err := setFSCacheFields(fields[1:], &m.CacheopReadOrAllocPageInProgress, &m.CacheopReadOrAllocPagesInProgress, + &m.CacheopAllocatePageInProgress, &m.CacheopAllocatePagesInProgress, &m.CacheopWritePagesInProgress, + &m.CacheopUncachePagesInProgress, &m.CacheopDissociatePagesInProgress) + if err != nil { + return &m, err + } + } + case "CacheEv:": + err := setFSCacheFields(fields[1:], &m.CacheevLookupsAndCreationsRejectedLackSpace, &m.CacheevStaleObjectsDeleted, + &m.CacheevRetiredWhenReliquished, &m.CacheevObjectsCulled) + if err != nil { + return &m, err + } + } + } + + return &m, nil +} |