* New tracepoints for read/write enter
@ 2019-02-25 17:17 Steve French
0 siblings, 0 replies; only message in thread
From: Steve French @ 2019-02-25 17:17 UTC (permalink / raw)
To: Pavel Shilovsky, CIFS
Looks like these could be useful -
"trace-cmd record -e smb3_write* -e smb3_read*"
root@smf-Thinkpad-P51:~/cifs-2.6# echo 0 > /proc/fs/cifs/Stats
root@smf-Thinkpad-P51:~/cifs-2.6# dd if=/dev/urandom of=/mnt1/8M
count=8000 bs=1024
8000+0 records in
8000+0 records out
8192000 bytes (8.2 MB, 7.8 MiB) copied, 0.0694953 s, 118 MB/s
root@smf-Thinkpad-P51:~/cifs-2.6# trace-cmd show
# tracer: nop
#
# _-----=> irqs-off
# / _----=> need-resched
# | / _---=> hardirq/softirq
# || / _--=> preempt-depth
# ||| / delay
# TASK-PID CPU# |||| TIMESTAMP FUNCTION
# | | | |||| | |
dd-21812 [006] .... 85789.843915: smb3_write_enter:
xid=0 sid=0x158347 tid=0x6c217504 fid=0x4e73e0d5 offset=0x0
len=0x400000
dd-21812 [006] .... 85789.845676: smb3_write_enter:
xid=0 sid=0x158347 tid=0x6c217504 fid=0x4e73e0d5 offset=0x400000
len=0x3d0000
cifsd-16822 [001] .... 85789.848381: smb3_write_done: xid=0
sid=0x158347 tid=0x6c217504 fid=0x4e73e0d5 offset=0x0 len=0x400000
cifsd-16822 [003] .... 85789.850297: smb3_write_done: xid=0
sid=0x158347 tid=0x6c217504 fid=0x4e73e0d5 offset=0x400000
len=0x3d0000
root@smf-Thinkpad-P51:~/cifs-2.6# cat /proc/fs/cifs/Stats
Resources in use
CIFS Session: 1
Share (unique mount targets): 2
SMB Request/Response Buffer: 1 Pool size: 5
SMB Small Req/Resp Buffer: 1 Pool size: 30
Operations (MIDs): 0
0 session 0 share reconnects
Total vfs operations: 6 maximum at one time: 1
1) \\localhost\scratch
SMBs: 12
Bytes read: 0 Bytes written: 8192000
Open files: 0 total (local), 1 open on server
TreeConnects: 0 total 0 failed
TreeDisconnects: 0 total 0 failed
Creates: 3 total 0 failed
Closes: 3 total 0 failed
Flushes: 0 total 0 failed
Reads: 0 total 0 failed
Writes: 2 total 0 failed
--
Thanks,
Steve
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2019-02-25 17:17 New tracepoints for read/write enter Steve French
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