From: Nikolaus Jeremic <jeremic@informatik.uni-rostock.de>
To: fio@vger.kernel.org
Subject: All I/O patterns are replayed to one file with fio 2.0.13
Date: Thu, 14 Feb 2013 20:37:02 +0100 [thread overview]
Message-ID: <511D3CDE.6070302@informatik.uni-rostock.de> (raw)
Hi,
I've tried to replay I/Os from a textual iolog file to a couple of files
using fio 2.0.13 on Linux. However, all I/Os were performed to the last
opened file, which is '/mnt/ssd5/rand-write.1.0_1_2' in this example .
My jobfile and iolog files contain the following:
############### job file #########
[global]
name=replay_filetraces
description=Replay file traces
ioengine=libaio
iodepth=6
direct=1
continue_on_error=1
[replay]
numjobs=1
read_iolog=file_io_patterns
unlink=0
############## EOF #########
############## iolog file #########
fio version 2 iolog
/mnt/ssd0/rand-write.1.0_0_0 add
/mnt/ssd1/rand-write.1.0_0_1 add
/mnt/ssd2/rand-write.1.0_0_2 add
/mnt/ssd3/rand-write.1.0_1_0 add
/mnt/ssd4/rand-write.1.0_1_1 add
/mnt/ssd5/rand-write.1.0_1_2 add
/mnt/ssd0/rand-write.1.0_0_0 open
/mnt/ssd1/rand-write.1.0_0_1 open
/mnt/ssd2/rand-write.1.0_0_2 open
/mnt/ssd3/rand-write.1.0_1_0 open
/mnt/ssd4/rand-write.1.0_1_1 open
/mnt/ssd5/rand-write.1.0_1_2 open
/mnt/ssd0/rand-write.1.0_0_0 write 0 65536
/mnt/ssd1/rand-write.1.0_0_1 write 0 65536
/mnt/ssd2/rand-write.1.0_0_2 write 0 65536
/mnt/ssd3/rand-write.1.0_1_0 write 0 65536
/mnt/ssd4/rand-write.1.0_1_1 write 0 65536
/mnt/ssd5/rand-write.1.0_1_2 write 0 65536
/mnt/ssd0/rand-write.1.0_0_0 write 65536 65536
/mnt/ssd1/rand-write.1.0_0_1 write 65536 65536
/mnt/ssd2/rand-write.1.0_0_2 write 65536 65536
/mnt/ssd3/rand-write.1.0_1_0 write 65536 65536
/mnt/ssd4/rand-write.1.0_1_1 write 65536 65536
/mnt/ssd5/rand-write.1.0_1_2 write 65536 65536
/mnt/ssd0/rand-write.1.0_0_0 close
/mnt/ssd1/rand-write.1.0_0_1 close
/mnt/ssd2/rand-write.1.0_0_2 close
/mnt/ssd3/rand-write.1.0_1_0 close
/mnt/ssd4/rand-write.1.0_1_1 close
/mnt/ssd5/rand-write.1.0_1_2 close
############## EOF #########
I've turned on debugging and added some extra printf in read_iolog2()
within iolog.c.
############## begin of debug excerpt ########
file 24594 add file /mnt/ssd0/rand-write.1.0_0_0
file 24594 resize file array to 2 files
file 24594 file 0x7fbe03f53090 "/mnt/ssd0/rand-write.1.0_0_0" added at 0
file 24594 add file /mnt/ssd1/rand-write.1.0_0_1
file 24594 file 0x7fbe03f53230 "/mnt/ssd1/rand-write.1.0_0_1" added at 1
file 24594 add file /mnt/ssd2/rand-write.1.0_0_2
file 24594 resize file array to 4 files
file 24594 file 0x7fbe03f533d0 "/mnt/ssd2/rand-write.1.0_0_2" added at 2
file 24594 add file /mnt/ssd3/rand-write.1.0_1_0
file 24594 file 0x7fbe03f53570 "/mnt/ssd3/rand-write.1.0_1_0" added at 3
file 24594 add file /mnt/ssd4/rand-write.1.0_1_1
file 24594 resize file array to 6 files
file 24594 file 0x7fbe03f53710 "/mnt/ssd4/rand-write.1.0_1_1" added at 4
file 24594 add file /mnt/ssd5/rand-write.1.0_1_2
file 24594 file 0x7fbe03f538b0 "/mnt/ssd5/rand-write.1.0_1_2" added at 5
io 24594 read_iolog2: Making note of file.
offset=7310584035475809390 bytes=811544671 fileno=0 file_action=1
fname=/mnt/ssd0/rand-write.1.0_0_0 act=open
io 24594 read_iolog2: Making note of file.
offset=7310584035475809390 bytes=811544671 fileno=1 file_action=1
fname=/mnt/ssd1/rand-write.1.0_0_1 act=open
io 24594 read_iolog2: Making note of file.
offset=7310584035475809390 bytes=811544671 fileno=2 file_action=1
fname=/mnt/ssd2/rand-write.1.0_0_2 act=open
io 24594 read_iolog2: Making note of file.
offset=7310584035475809390 bytes=811544671 fileno=3 file_action=1
fname=/mnt/ssd3/rand-write.1.0_1_0 act=open
io 24594 read_iolog2: Making note of file.
offset=7310584035475809390 bytes=811544671 fileno=4 file_action=1
fname=/mnt/ssd4/rand-write.1.0_1_1 act=open
io 24594 read_iolog2: Making note of file.
offset=7310584035475809390 bytes=811544671 fileno=5 file_action=1
fname=/mnt/ssd5/rand-write.1.0_1_2 act=open
io 24594 read_iolog2: Making note of file. offset=0 bytes=65536
fileno=5 file_action=1 fname=/mnt/ssd0/rand-write.1.0_0_0 act=write
io 24594 read_iolog2: Making note of file. offset=0 bytes=65536
fileno=5 file_action=1 fname=/mnt/ssd1/rand-write.1.0_0_1 act=write
io 24594 read_iolog2: Making note of file. offset=0 bytes=65536
fileno=5 file_action=1 fname=/mnt/ssd2/rand-write.1.0_0_2 act=write
io 24594 read_iolog2: Making note of file. offset=0 bytes=65536
fileno=5 file_action=1 fname=/mnt/ssd3/rand-write.1.0_1_0 act=write
io 24594 read_iolog2: Making note of file. offset=0 bytes=65536
fileno=5 file_action=1 fname=/mnt/ssd4/rand-write.1.0_1_1 act=write
io 24594 read_iolog2: Making note of file. offset=0 bytes=65536
fileno=5 file_action=1 fname=/mnt/ssd5/rand-write.1.0_1_2 act=write
io 24594 read_iolog2: Making note of file. offset=65536
bytes=65536 fileno=5 file_action=1 fname=/mnt/ssd0/rand-write.1.0_0_0
act=write
io 24594 read_iolog2: Making note of file. offset=65536
bytes=65536 fileno=5 file_action=1 fname=/mnt/ssd1/rand-write.1.0_0_1
act=write
io 24594 read_iolog2: Making note of file. offset=65536
bytes=65536 fileno=5 file_action=1 fname=/mnt/ssd2/rand-write.1.0_0_2
act=write
io 24594 read_iolog2: Making note of file. offset=65536
bytes=65536 fileno=5 file_action=1 fname=/mnt/ssd3/rand-write.1.0_1_0
act=write
io 24594 read_iolog2: Making note of file. offset=65536
bytes=65536 fileno=5 file_action=1 fname=/mnt/ssd4/rand-write.1.0_1_1
act=write
io 24594 read_iolog2: Making note of file. offset=65536
bytes=65536 fileno=5 file_action=1 fname=/mnt/ssd5/rand-write.1.0_1_2
act=write
io 24594 read_iolog2: Making note of file. offset=65536
bytes=65536 fileno=0 file_action=2 fname=/mnt/ssd0/rand-write.1.0_0_0
act=close
io 24594 read_iolog2: Making note of file. offset=65536
bytes=65536 fileno=1 file_action=2 fname=/mnt/ssd1/rand-write.1.0_0_1
act=close
io 24594 read_iolog2: Making note of file. offset=65536
bytes=65536 fileno=2 file_action=2 fname=/mnt/ssd2/rand-write.1.0_0_2
act=close
io 24594 read_iolog2: Making note of file. offset=65536
bytes=65536 fileno=3 file_action=2 fname=/mnt/ssd3/rand-write.1.0_1_0
act=close
io 24594 read_iolog2: Making note of file. offset=65536
bytes=65536 fileno=4 file_action=2 fname=/mnt/ssd4/rand-write.1.0_1_1
act=close
io 24594 read_iolog2: Making note of file. offset=65536
bytes=65536 fileno=5 file_action=2 fname=/mnt/ssd5/rand-write.1.0_1_2
act=close
############## end of debug excerpt ########
Taking a look to the debugging output shows that on write action the
'fileno' variable is always set to 5 regardless of the file that should
be written. However, for open and close we have a different fileno value
for each file. Taking a look into the source code of read_iolog2()
reveals why: In case of actions 'open' or 'close', 'fileno' is looked up
through 'get_fileno(td, fname)', but for 'write', 'read' and the other 4
argument actions 'fileno' is not looked up. When I add a 'fileno =
get_fileno(td, fname);' at the end of the '(r == 4)' branch, I/Os are
replayed to the designated files.
########## excerpt from read_iolog2() within iolog.c ######
if (r == 4) {
/*
* Check action first
*/
if (!strcmp(act, "wait"))
rw = DDIR_WAIT;
else if (!strcmp(act, "read"))
rw = DDIR_READ;
else if (!strcmp(act, "write"))
rw = DDIR_WRITE;
else if (!strcmp(act, "sync"))
rw = DDIR_SYNC;
else if (!strcmp(act, "datasync"))
rw = DDIR_DATASYNC;
else if (!strcmp(act, "trim"))
rw = DDIR_TRIM;
else {
log_err("fio: bad iolog file action: %s\n",
act);
continue;
}
} else if (r == 2) {
rw = DDIR_INVAL;
if (!strcmp(act, "add")) {
td->o.nr_files++;
fileno = add_file(td, fname);
file_action = FIO_LOG_ADD_FILE;
continue;
} else if (!strcmp(act, "open")) {
fileno = get_fileno(td, fname);
file_action = FIO_LOG_OPEN_FILE;
} else if (!strcmp(act, "close")) {
fileno = get_fileno(td, fname);
file_action = FIO_LOG_CLOSE_FILE;
} else {
log_err("fio: bad iolog file action: %s\n",
act);
continue;
}
} else {
log_err("bad iolog2: %s", p);
continue;
}
########## end ######
Best regards,
Nikolaus
--
Dipl.-Inf. Nikolaus Jeremic nikolaus.jeremic@uni-rostock.de
Universitaet Rostock Tel: (+49) 381 / 498 - 7635
Albert-Einstein-Str. 22 Fax: (+49) 381 / 498 - 7482
18059 Rostock, Germany wwwava.informatik.uni-rostock.de
next reply other threads:[~2013-02-14 19:57 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-14 19:37 Nikolaus Jeremic [this message]
2013-02-18 13:57 ` All I/O patterns are replayed to one file with fio 2.0.13 Jens Axboe
2013-02-18 15:48 ` Nikolaus Jeremic
2013-02-18 18:45 ` Jens Axboe
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=511D3CDE.6070302@informatik.uni-rostock.de \
--to=jeremic@informatik.uni-rostock.de \
--cc=fio@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.