__  __    __   __  _____      _            _          _____ _          _ _ 
 |  \/  |   \ \ / / |  __ \    (_)          | |        / ____| |        | | |
 | \  / |_ __\ V /  | |__) | __ ___   ____ _| |_ ___  | (___ | |__   ___| | |
 | |\/| | '__|> <   |  ___/ '__| \ \ / / _` | __/ _ \  \___ \| '_ \ / _ \ | |
 | |  | | |_ / . \  | |   | |  | |\ V / (_| | ||  __/  ____) | | | |  __/ | |
 |_|  |_|_(_)_/ \_\ |_|   |_|  |_| \_/ \__,_|\__\___| |_____/|_| |_|\___V 2.1
 if you need WebShell for Seo everyday contact me on Telegram
 Telegram Address : @jackleet
        
        

            For_More_Tools:
            
                Telegram: @jackleet | Bulk Smtp support mail sender  | Business Mail Collector  |  Mail Bouncer All Mail | Bulk Office Mail Validator | Html Letter private

Upload:

Command:

www-data@216.73.216.10: ~ $ 
Demonstrations of zfsslower, the Linux eBPF/bcc version.


zfsslower shows ZFS reads, writes, opens, and fsyncs, slower than a threshold.
It has been written to work on ZFS on Linux (http://zfsonlinux.org). For
example:

# ./zfsslower 
Tracing ZFS operations slower than 10 ms
TIME     COMM           PID    T BYTES   OFF_KB   LAT(ms) FILENAME
06:31:28 dd             25570  W 131072  38784     303.92 data1
06:31:34 dd             25686  W 131072  38784     388.28 data1
06:31:35 dd             25686  W 131072  78720     519.66 data1
06:31:35 dd             25686  W 131072  116992    405.94 data1
06:31:35 dd             25686  W 131072  153600    433.52 data1
06:31:36 dd             25686  W 131072  188672    314.37 data1
06:31:36 dd             25686  W 131072  222336    372.33 data1
06:31:36 dd             25686  W 131072  254592    309.59 data1
06:31:37 dd             25686  W 131072  285440    304.52 data1
06:31:37 dd             25686  W 131072  315008    236.45 data1
06:31:37 dd             25686  W 131072  343424    193.54 data1
06:31:38 dd             25686  W 131072  370560    286.07 data1
06:31:38 dd             25686  W 131072  396672    251.92 data1
[...]

This shows writes to a "data1" file, each taking well over the 10 ms threshold.
the slowest, on the 3rd line of output, reached 519.66 ms for a 128 Kbyte
write by the "dd" command.

This "latency" is measured from when the operation was issued from the VFS
interface to the file system (via the ZFS POSIX layer), to when it completed.
This spans everything: block device I/O (disk I/O), file system CPU cycles,
file system locks, run queue latency, etc. This is a better measure of the
latency suffered by applications reading from the file system than measuring
this down at the block device interface.

Note that this only traces the common file system operations previously
listed: other file system operations (eg, inode operations including
getattr()) are not traced.


A threshold of 0 will trace all operations. Warning: the output will be
verbose, as it will include all file system cache hits.

# ./zfsslower 0
Tracing ZFS operations
TIME     COMM           PID    T BYTES   OFF_KB   LAT(ms) FILENAME
06:36:07 dd             32242  O 0       0           0.01 data1
06:36:07 dd             32242  W 131072  0           0.25 data1
06:36:07 dd             32242  W 131072  128         0.03 data1
06:36:07 dd             32242  W 131072  256         0.04 data1
06:36:07 dd             32242  W 131072  384         0.04 data1
06:36:07 dd             32242  W 131072  512         0.04 data1
06:36:07 dd             32242  W 131072  640         0.03 data1
06:36:07 dd             32242  W 131072  768         0.03 data1
06:36:07 dd             32242  W 131072  896         0.04 data1
06:36:07 dd             32242  W 131072  1024        0.28 data1
06:36:07 dd             32242  W 131072  1152        0.04 data1
06:36:07 dd             32242  W 131072  1280        0.03 data1
[...]
06:36:07 dd             32242  W 131072  13824       0.04 data1
06:36:07 dd             32242  W 131072  13952       0.04 data1
06:36:07 dd             32242  W 131072  14080       0.04 data1
06:36:07 dd             32242  W 131072  14208     398.92 data1
06:36:07 dd             32242  W 131072  14336       0.04 data1
06:36:07 dd             32242  W 131072  14464       0.04 data1
06:36:07 dd             32242  W 131072  15104       0.03 data1
[...]

The output now includes the open operation for this file ("O"), and then the
writes. Most of the writes are very fast, with only an occasional outlier that
is in the hundreds of milliseconds.

Fortunately this is not a real world environment: I setup a zpool on top of a
XFS file system for testing purposes. More debugging using other tools will
explain these outliers: possibly XFS flushing.


Here's a random read workload, and showing operations slower than 1 ms:

# ./zfsslower 1
Tracing ZFS operations slower than 1 ms
TIME     COMM           PID    T BYTES   OFF_KB   LAT(ms) FILENAME
06:47:30 randread.pl    15431  R 8192    97840       1.03 data1
06:47:30 randread.pl    15431  R 8192    416744      1.12 data1
06:47:31 randread.pl    15431  R 8192    228856      1.96 data1
06:47:31 randread.pl    15431  R 8192    452248      1.02 data1
06:47:31 randread.pl    15431  R 8192    315288      5.90 data1
06:47:31 randread.pl    15431  R 8192    752696      1.20 data1
06:47:31 randread.pl    15431  R 8192    481832      1.39 data1
06:47:31 randread.pl    15431  R 8192    673752      1.39 data1
06:47:31 randread.pl    15431  R 8192    691736      1.01 data1
06:47:31 randread.pl    15431  R 8192    694776      1.78 data1
06:47:31 randread.pl    15431  R 8192    403328      3.75 data1
06:47:31 randread.pl    15431  R 8192    567688      1.08 data1
06:47:31 randread.pl    15431  R 8192    694280      1.31 data1
06:47:31 randread.pl    15431  R 8192    669280      1.06 data1
06:47:31 randread.pl    15431  R 8192    426608      1.56 data1
06:47:31 randread.pl    15431  R 8192    42512       1.01 data1
06:47:31 randread.pl    15431  R 8192    22944       1.33 data1
06:47:31 randread.pl    15431  R 8192    427432      1.48 data1
06:47:31 randread.pl    15431  R 8192    261320      1.28 data1
06:47:31 randread.pl    15431  R 8192    132248      1.23 data1
06:47:31 randread.pl    15431  R 8192    96936       1.04 data1
06:47:31 randread.pl    15431  R 8192    482800      2.63 data1
[...]


A -j option will print just the fields (parsable output, csv):

# ./zfsslower -j 1
ENDTIME_us,TASK,PID,TYPE,BYTES,OFFSET_b,LATENCY_us,FILE
252305490911,randread.pl,17922,R,8192,163446784,1156,data1
252305493852,randread.pl,17922,R,8192,321437696,1129,data1
252305498839,randread.pl,17922,R,8192,475152384,1154,data1
252305505515,randread.pl,17922,R,8192,49094656,1082,data1
252305506774,randread.pl,17922,R,8192,470401024,1245,data1
252305509265,randread.pl,17922,R,8192,553246720,2412,data1
252305512365,randread.pl,17922,R,8192,20963328,1093,data1
252305513755,randread.pl,17922,R,8192,304111616,1350,data1
252305583330,randread.pl,17922,R,8192,166174720,1154,data1
252305593913,randread.pl,17922,R,8192,175079424,1241,data1
252305602833,randread.pl,17922,R,8192,305340416,3307,data1
252305608663,randread.pl,17922,R,8192,655958016,2704,data1
252305611212,randread.pl,17922,R,8192,40951808,1033,data1
252305614609,randread.pl,17922,R,8192,318922752,2687,data1
252305623800,randread.pl,17922,R,8192,246734848,2983,data1
252305711125,randread.pl,17922,R,8192,581795840,1091,data1
252305728694,randread.pl,17922,R,8192,710483968,1034,data1
252305762046,randread.pl,17922,R,8192,329367552,1405,data1
252305798215,randread.pl,17922,R,8192,44482560,1030,data1
252305806748,randread.pl,17922,R,8192,660602880,1069,data1
252305826360,randread.pl,17922,R,8192,616144896,2327,data1
[...]


USAGE message:

# ./zfsslower -h
usage: zfsslower [-h] [-j] [-p PID] [min_ms]

Trace common ZFS file operations slower than a threshold

positional arguments:
  min_ms             minimum I/O duration to trace, in ms (default 10)

optional arguments:
  -h, --help         show this help message and exit
  -j, --csv          just print fields: comma-separated values
  -p PID, --pid PID  trace this PID only

examples:
    ./zfsslower             # trace operations slower than 10 ms (default)
    ./zfsslower 1           # trace operations slower than 1 ms
    ./zfsslower -j 1        # ... 1 ms, parsable output (csv)
    ./zfsslower 0           # trace all operations (warning: verbose)
    ./zfsslower -p 185      # trace PID 185 only

Filemanager

DIR : / usr/ share/ doc/ bpfcc-tools/ examples/ doc/
Name Type Size Permission Actions
lib Folder 0755
argdist_example.txt File 22.49 KB 0644
bashreadline_example.txt File 882 B 0644
bindsnoop_example.txt File 4.42 KB 0644
biolatency_example.txt File 23.46 KB 0644
biolatpcts_example.txt File 2.97 KB 0644
biopattern_example.txt File 1.37 KB 0644
biosnoop_example.txt File 3.47 KB 0644
biotop_example.txt File 9.11 KB 0644
bitesize_example.txt File 4.98 KB 0644
bpflist_example.txt File 2.13 KB 0644
btrfsdist_example.txt File 9.32 KB 0644
btrfsslower_example.txt File 6.65 KB 0644
cachestat_example.txt File 3.92 KB 0644
cachetop_example.txt File 3.83 KB 0644
capable_example.txt File 6.5 KB 0644
cobjnew_example.txt File 2.97 KB 0644
compactsnoop_example.txt File 9.92 KB 0644
cpudist_example.txt File 16.48 KB 0644
cpuunclaimed_example.txt File 15.2 KB 0644
criticalstat_example.txt File 4.81 KB 0644
cthreads_example.txt File 2.08 KB 0644
dbslower_example.txt File 3.89 KB 0644
dbstat_example.txt File 6.5 KB 0644
dcsnoop_example.txt File 4.27 KB 0644
dcstat_example.txt File 3.26 KB 0644
deadlock_example.txt File 16.25 KB 0644
dirtop_example.txt File 4.98 KB 0644
drsnoop_example.txt File 5 KB 0644
execsnoop_example.txt File 6.64 KB 0644
exitsnoop_example.txt File 6.22 KB 0644
ext4dist_example.txt File 8.78 KB 0644
ext4slower_example.txt File 11.07 KB 0644
filegone_example.txt File 743 B 0644
filelife_example.txt File 2.04 KB 0644
fileslower_example.txt File 5.58 KB 0644
filetop_example.txt File 6.8 KB 0644
funccount_example.txt File 13.29 KB 0644
funcinterval_example.txt File 15.28 KB 0644
funclatency_example.txt File 20.98 KB 0644
funcslower_example.txt File 6.63 KB 0644
gethostlatency_example.txt File 1.29 KB 0644
hardirqs_example.txt File 37.05 KB 0644
inject_example.txt File 6.67 KB 0644
javacalls_example.txt File 3.91 KB 0644
javaflow_example.txt File 5.88 KB 0644
javagc_example.txt File 3.78 KB 0644
javaobjnew_example.txt File 2.97 KB 0644
javastat_example.txt File 2.98 KB 0644
javathreads_example.txt File 2.08 KB 0644
killsnoop_example.txt File 1.31 KB 0644
klockstat_example.txt File 8.34 KB 0644
kvmexit_example.txt File 11.63 KB 0644
llcstat_example.txt File 3.24 KB 0644
mdflush_example.txt File 1.74 KB 0644
memleak_example.txt File 10.02 KB 0644
mountsnoop_example.txt File 1.45 KB 0644
mysqld_qslower_example.txt File 2.3 KB 0644
netqtop_example.txt File 12.2 KB 0644
nfsdist_example.txt File 8.31 KB 0644
nfsslower_example.txt File 7.68 KB 0644
nodegc_example.txt File 3.78 KB 0644
nodestat_example.txt File 2.98 KB 0644
offcputime_example.txt File 19.2 KB 0644
offwaketime_example.txt File 37.36 KB 0644
oomkill_example.txt File 1.88 KB 0644
opensnoop_example.txt File 10.33 KB 0644
perlcalls_example.txt File 3.91 KB 0644
perlflow_example.txt File 5.88 KB 0644
perlstat_example.txt File 2.98 KB 0644
phpcalls_example.txt File 3.91 KB 0644
phpflow_example.txt File 5.88 KB 0644
phpstat_example.txt File 2.98 KB 0644
pidpersec_example.txt File 677 B 0644
ppchcalls_example.txt File 6.93 KB 0644
profile_example.txt File 31.08 KB 0644
pythoncalls_example.txt File 3.91 KB 0644
pythonflow_example.txt File 5.88 KB 0644
pythongc_example.txt File 3.78 KB 0644
pythonstat_example.txt File 2.98 KB 0644
rdmaucma_example.txt File 1.94 KB 0644
readahead_example.txt File 3.17 KB 0644
reset-trace_example.txt File 9.15 KB 0644
rubycalls_example.txt File 3.91 KB 0644
rubyflow_example.txt File 5.88 KB 0644
rubygc_example.txt File 3.78 KB 0644
rubyobjnew_example.txt File 2.97 KB 0644
rubystat_example.txt File 2.98 KB 0644
runqlat_example.txt File 31.3 KB 0644
runqlen_example.txt File 11.85 KB 0644
runqslower_example.txt File 2.13 KB 0644
shmsnoop_example.txt File 2.73 KB 0644
slabratetop_example.txt File 5.22 KB 0644
sofdsnoop_example.txt File 3.14 KB 0644
softirqs_example.txt File 11.02 KB 0644
solisten_example.txt File 2.3 KB 0644
sslsniff_example.txt File 6.74 KB 0644
stackcount_example.txt File 21.45 KB 0644
statsnoop_example.txt File 3.02 KB 0644
swapin.txt File 2.57 KB 0644
swapin_example.txt File 1.39 KB 0644
syncsnoop_example.txt File 387 B 0644
syscount_example.txt File 6.27 KB 0644
tclcalls_example.txt File 3.91 KB 0644
tclflow_example.txt File 5.88 KB 0644
tclobjnew_example.txt File 2.97 KB 0644
tclstat_example.txt File 2.98 KB 0644
tcpaccept_example.txt File 2.76 KB 0644
tcpcong_example.txt File 33.31 KB 0644
tcpconnect_example.txt File 6.27 KB 0644
tcpconnlat_example.txt File 2.55 KB 0644
tcpdrop_example.txt File 1.95 KB 0644
tcplife_example.txt File 6.83 KB 0644
tcpretrans_example.txt File 3.85 KB 0644
tcprtt_example.txt File 9.83 KB 0644
tcpstates_example.txt File 2.84 KB 0644
tcpsubnet_example.txt File 5.37 KB 0644
tcpsynbl_example.txt File 1.15 KB 0644
tcptop_example.txt File 5.75 KB 0644
tcptracer_example.txt File 1.98 KB 0644
threadsnoop_example.txt File 1.07 KB 0644
tplist_example.txt File 4.4 KB 0644
trace_example.txt File 21.62 KB 0644
ttysnoop_example.txt File 3.24 KB 0644
vfscount_example.txt File 2.17 KB 0644
vfsstat_example.txt File 1.66 KB 0644
virtiostat_example.txt File 2.62 KB 0644
wakeuptime_example.txt File 33.25 KB 0644
xfsdist_example.txt File 6.77 KB 0644
xfsslower_example.txt File 6.91 KB 0644
zfsdist_example.txt File 9.52 KB 0644
zfsslower_example.txt File 7.37 KB 0644

Copyright reserved © 2026 xtooler.online Shell Coded By Mr.X

Filemanager