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[FEATURE] Add fscache collector #3321

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feba1fd
[FEATURE] Add fscache collector
mmolisch Apr 29, 2025
87c8acb
fix e2e output
mmolisch Apr 29, 2025
9c880a8
fix e2e #2
mmolisch Apr 29, 2025
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1 change: 1 addition & 0 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -194,6 +194,7 @@ devstat | Exposes device statistics | Dragonfly, FreeBSD
drm | Expose GPU metrics using sysfs / DRM, `amdgpu` is the only driver which exposes this information through DRM | Linux
drbd | Exposes Distributed Replicated Block Device statistics (to version 8.4) | Linux
ethtool | Exposes network interface information and network driver statistics equivalent to `ethtool`, `ethtool -S`, and `ethtool -i`. | Linux
fscache | Exposes FS-Cache statistics from `/proc/fs/fscache/stats`. | Linux
interrupts | Exposes detailed interrupts statistics. | Linux, OpenBSD
ksmd | Exposes kernel and system statistics from `/sys/kernel/mm/ksm`. | Linux
lnstat | Exposes stats from `/proc/net/stat/`. | Linux
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64 changes: 64 additions & 0 deletions collector/fixtures/e2e-64k-page-output.txt
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Expand Up @@ -829,6 +829,69 @@ node_filefd_maximum 1.631329e+06
# HELP node_forks_total Total number of forks.
# TYPE node_forks_total counter
node_forks_total 26442
# HELP node_fscache_acquire_attempts_total Number of acquire operations attempted (Acquire: n=attempts).
# TYPE node_fscache_acquire_attempts_total counter
node_fscache_acquire_attempts_total 31998
# HELP node_fscache_acquire_success_total Number of acquire operations successful (Acquire: ok=success).
# TYPE node_fscache_acquire_success_total counter
node_fscache_acquire_success_total 31986
# HELP node_fscache_allocations_success_total Number of successful allocation operations (Allocs: ok=success).
# TYPE node_fscache_allocations_success_total counter
node_fscache_allocations_success_total 0
# HELP node_fscache_allocations_total Number of allocation operations attempted (Allocs: n=attempts).
# TYPE node_fscache_allocations_total counter
node_fscache_allocations_total 0
# HELP node_fscache_attribute_changes_success_total Number of successful attribute change operations (AttrChg: ok=success).
# TYPE node_fscache_attribute_changes_success_total counter
node_fscache_attribute_changes_success_total 0
# HELP node_fscache_attribute_changes_total Number of attribute change operations attempted (AttrChg: n=attempts).
# TYPE node_fscache_attribute_changes_total counter
node_fscache_attribute_changes_total 0
# HELP node_fscache_invalidations_total Number of invalidation operations (Invals: n=tot).
# TYPE node_fscache_invalidations_total counter
node_fscache_invalidations_total 409
# HELP node_fscache_lookups_negative_total Number of negative lookup operations (Lookups: neg=negative).
# TYPE node_fscache_lookups_negative_total counter
node_fscache_lookups_negative_total 0
# HELP node_fscache_lookups_positive_total Number of positive lookup operations (Lookups: pos=positive).
# TYPE node_fscache_lookups_positive_total counter
node_fscache_lookups_positive_total 0
# HELP node_fscache_lookups_total Number of lookup operations (Lookups: n=tot).
# TYPE node_fscache_lookups_total counter
node_fscache_lookups_total 0
# HELP node_fscache_objects_allocated_total Number of index cookies allocated (Cookies: idx=allocated/available/unused).
# TYPE node_fscache_objects_allocated_total counter
node_fscache_objects_allocated_total 16
# HELP node_fscache_objects_available_total Number of index cookies available (Cookies: idx=allocated/available/unused).
# TYPE node_fscache_objects_available_total counter
node_fscache_objects_available_total 0
# HELP node_fscache_objects_culled_total Number of objects culled (CacheEv: cul=culled).
# TYPE node_fscache_objects_culled_total counter
node_fscache_objects_culled_total 0
# HELP node_fscache_objects_retired_total Number of objects retired (CacheEv: rtr=retired).
# TYPE node_fscache_objects_retired_total counter
node_fscache_objects_retired_total 0
# HELP node_fscache_relinquishes_total Number of relinquish operations (Relinqs: n=tot).
# TYPE node_fscache_relinquishes_total counter
node_fscache_relinquishes_total 31939
# HELP node_fscache_retrievals_nobuffer_total Number of retrieval (read) operations failed due to no buffer (Retrvls: nbf=nobuff).
# TYPE node_fscache_retrievals_nobuffer_total counter
node_fscache_retrievals_nobuffer_total 2.551742e+06
# HELP node_fscache_retrievals_success_total Number of successful retrieval (read) operations (Retrvls: ok=success).
# TYPE node_fscache_retrievals_success_total counter
node_fscache_retrievals_success_total 0
# HELP node_fscache_retrievals_total Number of retrieval (read) operations attempted (Retrvls: n=attempts).
# TYPE node_fscache_retrievals_total counter
node_fscache_retrievals_total 2.551742e+06
# HELP node_fscache_stores_success_total Number of successful store (write) operations (Stores: ok=success).
# TYPE node_fscache_stores_success_total counter
node_fscache_stores_success_total 0
# HELP node_fscache_stores_total Number of store (write) operations attempted (Stores: n=attempts).
# TYPE node_fscache_stores_total counter
node_fscache_stores_total 0
# HELP node_fscache_updates_total Number of update operations (Updates: n=tot).
# TYPE node_fscache_updates_total counter
node_fscache_updates_total 0
# HELP node_hwmon_chip_names Annotation metric for human-readable chip names
# TYPE node_hwmon_chip_names gauge
node_hwmon_chip_names{chip="nct6779",chip_name="nct6779"} 1
Expand Down Expand Up @@ -2973,6 +3036,7 @@ node_scrape_collector_success{collector="edac"} 1
node_scrape_collector_success{collector="entropy"} 1
node_scrape_collector_success{collector="fibrechannel"} 1
node_scrape_collector_success{collector="filefd"} 1
node_scrape_collector_success{collector="fscache"} 1
node_scrape_collector_success{collector="hwmon"} 1
node_scrape_collector_success{collector="infiniband"} 1
node_scrape_collector_success{collector="interrupts"} 1
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64 changes: 64 additions & 0 deletions collector/fixtures/e2e-output.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -851,6 +851,69 @@ node_filefd_maximum 1.631329e+06
# HELP node_forks_total Total number of forks.
# TYPE node_forks_total counter
node_forks_total 26442
# HELP node_fscache_acquire_attempts_total Number of acquire operations attempted (Acquire: n=attempts).
# TYPE node_fscache_acquire_attempts_total counter
node_fscache_acquire_attempts_total 31998
# HELP node_fscache_acquire_success_total Number of acquire operations successful (Acquire: ok=success).
# TYPE node_fscache_acquire_success_total counter
node_fscache_acquire_success_total 31986
# HELP node_fscache_allocations_success_total Number of successful allocation operations (Allocs: ok=success).
# TYPE node_fscache_allocations_success_total counter
node_fscache_allocations_success_total 0
# HELP node_fscache_allocations_total Number of allocation operations attempted (Allocs: n=attempts).
# TYPE node_fscache_allocations_total counter
node_fscache_allocations_total 0
# HELP node_fscache_attribute_changes_success_total Number of successful attribute change operations (AttrChg: ok=success).
# TYPE node_fscache_attribute_changes_success_total counter
node_fscache_attribute_changes_success_total 0
# HELP node_fscache_attribute_changes_total Number of attribute change operations attempted (AttrChg: n=attempts).
# TYPE node_fscache_attribute_changes_total counter
node_fscache_attribute_changes_total 0
# HELP node_fscache_invalidations_total Number of invalidation operations (Invals: n=tot).
# TYPE node_fscache_invalidations_total counter
node_fscache_invalidations_total 409
# HELP node_fscache_lookups_negative_total Number of negative lookup operations (Lookups: neg=negative).
# TYPE node_fscache_lookups_negative_total counter
node_fscache_lookups_negative_total 0
# HELP node_fscache_lookups_positive_total Number of positive lookup operations (Lookups: pos=positive).
# TYPE node_fscache_lookups_positive_total counter
node_fscache_lookups_positive_total 0
# HELP node_fscache_lookups_total Number of lookup operations (Lookups: n=tot).
# TYPE node_fscache_lookups_total counter
node_fscache_lookups_total 0
# HELP node_fscache_objects_allocated_total Number of index cookies allocated (Cookies: idx=allocated/available/unused).
# TYPE node_fscache_objects_allocated_total counter
node_fscache_objects_allocated_total 16
# HELP node_fscache_objects_available_total Number of index cookies available (Cookies: idx=allocated/available/unused).
# TYPE node_fscache_objects_available_total counter
node_fscache_objects_available_total 0
# HELP node_fscache_objects_culled_total Number of objects culled (CacheEv: cul=culled).
# TYPE node_fscache_objects_culled_total counter
node_fscache_objects_culled_total 0
# HELP node_fscache_objects_retired_total Number of objects retired (CacheEv: rtr=retired).
# TYPE node_fscache_objects_retired_total counter
node_fscache_objects_retired_total 0
# HELP node_fscache_relinquishes_total Number of relinquish operations (Relinqs: n=tot).
# TYPE node_fscache_relinquishes_total counter
node_fscache_relinquishes_total 31939
# HELP node_fscache_retrievals_nobuffer_total Number of retrieval (read) operations failed due to no buffer (Retrvls: nbf=nobuff).
# TYPE node_fscache_retrievals_nobuffer_total counter
node_fscache_retrievals_nobuffer_total 2.551742e+06
# HELP node_fscache_retrievals_success_total Number of successful retrieval (read) operations (Retrvls: ok=success).
# TYPE node_fscache_retrievals_success_total counter
node_fscache_retrievals_success_total 0
# HELP node_fscache_retrievals_total Number of retrieval (read) operations attempted (Retrvls: n=attempts).
# TYPE node_fscache_retrievals_total counter
node_fscache_retrievals_total 2.551742e+06
# HELP node_fscache_stores_success_total Number of successful store (write) operations (Stores: ok=success).
# TYPE node_fscache_stores_success_total counter
node_fscache_stores_success_total 0
# HELP node_fscache_stores_total Number of store (write) operations attempted (Stores: n=attempts).
# TYPE node_fscache_stores_total counter
node_fscache_stores_total 0
# HELP node_fscache_updates_total Number of update operations (Updates: n=tot).
# TYPE node_fscache_updates_total counter
node_fscache_updates_total 0
# HELP node_hwmon_chip_names Annotation metric for human-readable chip names
# TYPE node_hwmon_chip_names gauge
node_hwmon_chip_names{chip="nct6779",chip_name="nct6779"} 1
Expand Down Expand Up @@ -2995,6 +3058,7 @@ node_scrape_collector_success{collector="edac"} 1
node_scrape_collector_success{collector="entropy"} 1
node_scrape_collector_success{collector="fibrechannel"} 1
node_scrape_collector_success{collector="filefd"} 1
node_scrape_collector_success{collector="fscache"} 1
node_scrape_collector_success{collector="hwmon"} 1
node_scrape_collector_success{collector="infiniband"} 1
node_scrape_collector_success{collector="interrupts"} 1
Expand Down
29 changes: 29 additions & 0 deletions collector/fixtures/proc/fs/fscache/stats
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@@ -0,0 +1,29 @@
FS-Cache statistics
Cookies: idx=16 dat=31970 spc=0
Objects: alc=0 nal=0 avl=0 ded=0
ChkAux : non=0 ok=0 upd=0 obs=0
Pages : mrk=0 unc=0
Acquire: n=31998 nul=0 noc=0 ok=31986 nbf=0 oom=0
Lookups: n=0 neg=0 pos=0 crt=0 tmo=0
Invals : n=409 run=0
Updates: n=0 nul=0 run=0
Relinqs: n=31939 nul=0 wcr=0 rtr=0
AttrChg: n=0 ok=0 nbf=0 oom=0 run=0
Allocs : n=0 ok=0 wt=0 nbf=0 int=0
Allocs : ops=0 owt=0 abt=0
Retrvls: n=2551742 ok=0 wt=0 nod=0 nbf=2551742 int=0 oom=0
Retrvls: ops=0 owt=0 abt=0
Stores : n=0 ok=0 agn=0 nbf=0 oom=0
Stores : ops=0 run=0 pgs=0 rxd=0 olm=0
VmScan : nos=0 gon=0 bsy=0 can=0 wt=0
Ops : pend=0 run=0 enq=0 can=0 rej=0
Ops : ini=0 dfr=0 rel=0 gc=0
CacheOp: alo=0 luo=0 luc=0 gro=0
CacheOp: inv=0 upo=0 dro=0 pto=0 atc=0 syn=0
CacheOp: rap=0 ras=0 alp=0 als=0 wrp=0 ucp=0 dsp=0
CacheEv: nsp=0 stl=0 rtr=0 cul=0
RdHelp : RA=0 RP=0 WB=0 WBZ=0 rr=0 sr=0
RdHelp : ZR=0 sh=0 sk=0
RdHelp : DL=0 ds=0 df=0 di=0
RdHelp : RD=0 rs=0 rf=0
RdHelp : WR=0 ws=0 wf=0
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