rfjakob

$ ls -l /mnt/synology/public/tmp/g1
total 0
-rwxr-xr-x. 1 jakob jakob 0 May 24 21:56 1000
-rwxr-xr-x. 1 jakob jakob 0 May 24 21:56 1001
-rwxr-xr-x. 1 jakob jakob 0 May 24 21:56 1002
-rwxr-xr-x. 1 jakob jakob 0 May 24 21:56 1003
-rwxr-xr-x. 1 jakob jakob 0 May 24 21:56 1004
-rwxr-xr-x. 1 jakob jakob 0 May 24 21:56 1005
-rwxr-xr-x. 1 jakob jakob 0 May 24 21:56 1006
-rwxr-xr-x. 1 jakob jakob 0 May 24 21:56 1007

rfjakob

+ date
Sat 02 May 2020 03:11:29 PM UTC
+ cat /proc/spl/kstat/zfs/arcstats
cat: /proc/spl/kstat/zfs/arcstats: No such file or directory
+ free -m
              total        used        free      shared  buff/cache   available
Mem:           3918         159        2996           1         761        3499
Swap:             0           0           0
+ echo 3
+ sleep 1

rfjakob

+ date
Sat 02 May 2020 02:35:27 PM UTC
+ cat /proc/spl/kstat/zfs/arcstats
12 1 0x01 98 26656 61459994959 8348037495402
name                            type data
hits                            4    693075
misses                          4    114218
demand_data_hits                4    83094
demand_data_misses              4    107008
demand_metadata_hits            4    581417

rfjakob

$ cat /proc/spl/kstat/zfs/arcstats 
12 1 0x01 98 26656 187832775182252 189000500220796
name                            type data
hits                            4    776
misses                          4    0
demand_data_hits                4    0
demand_data_misses              4    0
demand_metadata_hits            4    776
demand_metadata_misses          4    0
prefetch_data_hits              4    0

rfjakob

#!/bin/bash

# Number of processors to use
PROCS=4

echo "TIME SPEED TEMP FREQ"

SECONDS=0
while sleep 0.1; do
	SPEED=$(openssl speed -bytes 1024 -multi $PROCS sha256 2>&1 | tail -1)

rfjakob

$ rsync -P /tmp/1g 127.0.0.1:/tmp/1g.2
1g
  1,073,741,824 100%   22.71MB/s    0:00:45 (xfr#1, to-chk=0/1)

$ rsync -P /tmp/1g -e "ssh -T" 127.0.0.1:/tmp/1g.2
1g
  1,073,741,824 100%   20.39MB/s    0:00:50 (xfr#1, to-chk=0/1)

$ rsync -P /tmp/1g -e "ssh -o Compression=no" 127.0.0.1:/tmp/1g.2
1g

rfjakob

osboxes@osboxes:~$ ps auxwww | grep udisk
osboxes   1874  0.1  0.4 377172 10064 ?        Sl   14:57   0:00 /usr/lib/gvfs/gvfs-udisks2-volume-monitor
root      1881  0.1  0.4 382392  9924 ?        Ssl  14:57   0:00 /usr/lib/udisks2/udisksd --no-debug
osboxes   2125  0.0  0.0  21292   984 pts/8    R+   14:59   0:00 grep --color=auto udisk

osboxes@osboxes:~$ sudo strace -f -p 1874
strace: Process 1874 attached with 3 threads
[pid  1880] restart_syscall(<... resuming interrupted restart_syscall ...> <unfinished ...>
[pid  1879] restart_syscall(<... resuming interrupted restart_syscall ...> <unfinished ...>
[pid  1874] restart_syscall(<... resuming interrupted restart_syscall ...>) = 1

rfjakob

osboxes@osboxes:~/go/src/github.com/hanwen/go-fuse/nodefs$ uname -a
Linux osboxes 4.15.0-45-generic #48~16.04.1-Ubuntu SMP Tue Jan 29 18:03:48 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
osboxes@osboxes:~/go/src/github.com/hanwen/go-fuse/nodefs$ git describe
v1.0.0-170-g4f40cf4
osboxes@osboxes:~/go/src/github.com/hanwen/go-fuse/nodefs$ go test -run TestReadDir -v
=== RUN   TestReadDir
08:02:31.690637 rx 1: INIT i0 {7.26 Ra 0x20000 AUTO_INVAL_DATA,PARALLEL_DIROPS,NO_OPEN_SUPPORT,POSIX_ACL,HANDLE_KILLPRIV,ATOMIC_O_TRUNC,EXPORT_SUPPORT,BIG_WRITES,IOCTL_DIR,READDIRPLUS_AUTO,ASYNC_DIO,WRITEBACK_CACHE,POSIX_LOCKS,SPLICE_READ,FLOCK_LOCKS,READDIRPLUS,SPLICE_MOVE,ASYNC_READ,DONT_MASK,SPLICE_WRITE} 
08:02:31.690746 tx 1:     OK, {7.26 Ra 0x20000 ASYNC_READ,AUTO_INVAL_DATA,PARALLEL_DIROPS,BIG_WRITES,NO_OPEN_SUPPORT,READDIRPLUS 0/0 Wr 0x10000 Tg 0x0}
08:02:31.690870 rx 2: LOOKUP i1 [".go-fuse-epoll-hack"] 20b
08:02:31.690928 tx 2:     2=no such file or directory, {i0 g0 tE=0s tA=0s {M00 SZ=0 L=0 0:0 B0*0 i0:0 A 0.000000 M 0.

rfjakob

05a3771cbea72f2f7d50be19daa19f3dff2d6163 is the first bad commit
commit 05a3771cbea72f2f7d50be19daa19f3dff2d6163
Author: Kirill Smelkov <kirr@nexedi.com>
Date:   Sat Feb 16 22:21:52 2019 +0300

    fuse: Enable parallel lookup and readdir by default
    
    After Linux VFS was enhanced to be able to do several lookups and
    readdirs in parallel, FUSE client in Linux, in fear to break existing
    filesystems, explicitly reverted it back to be serial in FUSE exchange

rfjakob

fuse-xfstests$ sudo ./check-gocryptfs 
[sudo] password for jakob: 
gocryptfs v1.7-rc1-67-gbdd5f47-dirty; go-fuse v20170619-82-gc121160-dirty; 2019-02-03 go1.11.4
fuse-xfstests gocryptfs-2018-08-18/d8111119
Sun Feb  3 14:51:49 UTC 2019

FSTYP         -- fuse.gocryptfs
PLATFORM      -- Linux/x86_64 brikett 4.19.12-301.fc29.x86_64
MKFS_OPTIONS  -- /var/tmp/check-gocryptfs/scratchdev
MOUNT_OPTIONS -- -o context=system_u:object_r:root_t:s0 /var/tmp/check-gocryptfs/scratchdev /var/tmp/check-gocryptfs/scratchdir