On Thu, Mar 21, 2013 at 03:58:35PM +0200, Konstantin Belousov wrote: > ... > > Script started on Thu Mar 21 06:07:41 2013 > > g1-235(10.0-C)[1] uname -a > > FreeBSD g1-235.catwhisker.org 10.0-CURRENT FreeBSD 10.0-CURRENT #845 > > r248575M/248575: Thu Mar 21 05:35:06 PDT 2013 > > r...@g1-235.catwhisker.org:/usr/obj/usr/src/sys/CANARY i386 > > g1-235(10.0-C)[2] sysctl vfs.unmapped_buf_allowed kern.bio_transient_maxcnt > > kern.nbuf > > vfs.unmapped_buf_allowed: 1 > > kern.bio_transient_maxcnt: 697 > > kern.nbuf: 7224 > Could you, please, do some more measurements in the r248575M ? > > Please show the kern.nbuf for vfs.unmapped_buf_allowed=0 case. > Also, from there, run "kgdb /boot/kernel/kernel /dev/mem" and do > p *buffer_map. > > Reboot without applying any unmapped/transient tuning, run the kgdb > again, and do > p *buffer_map > p *bio_transient_map > > Reboot with kern.bio_transient_maxcnt tunable set to 256 and again > print the buffer_map and bio_transient_map from the kgdb. > ...
OK; sorry about the delay -- I needed to use the machinie for a while (at work), and then I had a weekly staff meeting.... Anyway... I've attached results of the above. For the first & last, I did each twice -- once using the "nv" driver, and once using the "nvidia" driver. (The middle one only got the "nv" driver.) So the files are: kib_0_nv kib_0_nvidia kib_1_nv kib_2_nv kib_2_nvidia Peace, david -- David H. Wolfskill da...@catwhisker.org Taliban: Evil men with guns afraid of truth from a 14-year old girl. See http://www.catwhisker.org/~david/publickey.gpg for my public key.
Script started on Thu Mar 21 10:39:14 2013
root@d129:~ # uname -a
FreeBSD g1-235.catwhisker.org 10.0-CURRENT FreeBSD 10.0-CURRENT #845
r248575M/248575: Thu Mar 21 05:35:06 PDT 2013
r...@g1-235.catwhisker.org:/usr/obj/usr/src/sys/CANARY i386
root@d129:~ # sysctl vfs.unmapped_buf_allowed
vfs.unmapped_buf_allowed: 0
root@d129:~ # k[Ksyst[Kctl kern.nbuf
kern.nbuf: 7224
root@d129:~ # kgdb /boot/kernel/kernel /dev/mem
GNU gdb 6.1.1 [FreeBSD]
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB. Type "show warranty" for details.
This GDB was configured as "i386-marcel-freebsd"...
Reading symbols from /boot/kernel/linux.ko...Reading symbols from
/boot/kernel/linux.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/linux.ko
Reading symbols from /boot/kernel/coretemp.ko...Reading symbols from
/boot/kernel/coretemp.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/coretemp.ko
Reading symbols from /boot/kernel/iwn5000fw.ko...Reading symbols from
/boot/kernel/iwn5000fw.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/iwn5000fw.ko
Reading symbols from /boot/kernel/tmpfs.ko...Reading symbols from
/boot/kernel/tmpfs.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/tmpfs.ko
Reading symbols from /boot/kernel/fdescfs.ko...Reading symbols from
/boot/kernel/fdescfs.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/fdescfs.ko
#0 sched_switch (td=0xc1312a70, newtd=0xcd98b900, flags=-1048441924)
at /usr/src/sys/kern/sched_ule.c:1954
1954 cpuid = PCPU_GET(cpuid);
(kgdb) p *buffer_map
$1 = {header = {prev = 0xc19cf288, next = 0xc19cf288, left = 0x0, right = 0x0,
start = 3925868544, end = 4044226560, avail_ssize = 0, adj_free = 0,
max_free = 0, object = {vm_object = 0x0, sub_map = 0x0}, offset = 0,
eflags = 0, protection = 0 '\0', max_protection = 0 '\0',
inheritance = 0 '\0', read_ahead = 0 '\0', wired_count = 0, next_read = 0,
cred = 0x0}, lock = {lock_object = {lo_name = 0xc0fc6c80 "vm map (user)",
lo_flags = 36896768, lo_data = 0, lo_witness = 0xcd8022b0},
sx_lock = 1}, system_mtx = {lock_object = {
lo_name = 0xc0fc6c52 "vm map (system)", lo_flags = 21168128,
lo_data = 0, lo_witness = 0xcd802110}, mtx_lock = 4}, nentries = 1,
size = 84590592, timestamp = 5163, needs_wakeup = 0 '\0',
system_map = 1 '\001', flags = 0 '\0', root = 0xc19cf288, pmap = 0xc13279f8,
busy = 0}
Current language: auto; currently minimal
(kgdb) p *bio_transient_map
Error accessing memory address 0x0: Bad address.
(kgdb) root@d129:~ # ^Dexit
Script done on Thu Mar 21 10:40:35 2013
Script started on Thu Mar 21 10:43:15 2013
root@d129:~ # uname -a
FreeBSD g1-235.catwhisker.org 10.0-CURRENT FreeBSD 10.0-CURRENT #845
r248575M/248575: Thu Mar 21 05:35:06 PDT 2013
r...@g1-235.catwhisker.org:/usr/obj/usr/src/sys/CANARY i386
root@d129:~ # sysctl vfs.unmapped_buf_allowed
vfs.unmapped_buf_allowed: 0
root@d129:~ # sysctl kern.nbuf
kern.nbuf: 7224
root@d129:~ # kgdp[Kb /boot/kernel/kernel /dev/mem
GNU gdb 6.1.1 [FreeBSD]
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB. Type "show warranty" for details.
This GDB was configured as "i386-marcel-freebsd"...
Reading symbols from /boot/kernel/linux.ko...Reading symbols from
/boot/kernel/linux.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/linux.ko
Reading symbols from /boot/kernel/coretemp.ko...Reading symbols from
/boot/kernel/coretemp.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/coretemp.ko
Reading symbols from /boot/kernel/iwn5000fw.ko...Reading symbols from
/boot/kernel/iwn5000fw.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/iwn5000fw.ko
Reading symbols from /boot/modules/nvidia.ko...done.
Loaded symbols for /boot/modules/nvidia.ko
Reading symbols from /boot/kernel/tmpfs.ko...Reading symbols from
/boot/kernel/tmpfs.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/tmpfs.ko
Reading symbols from /boot/kernel/fdescfs.ko...Reading symbols from
/boot/kernel/fdescfs.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/fdescfs.ko
#0 sched_switch (td=0xc1312a70, newtd=0xce18b900, flags=-1040053316)
at /usr/src/sys/kern/sched_ule.c:1954
1954 cpuid = PCPU_GET(cpuid);
(kgdb) p *buffer_map
$1 = {header = {prev = 0xc21ce630, next = 0xc21ce630, left = 0x0, right = 0x0,
start = 3934257152, end = 4052615168, avail_ssize = 0, adj_free = 0,
max_free = 0, object = {vm_object = 0x0, sub_map = 0x0}, offset = 0,
eflags = 0, protection = 0 '\0', max_protection = 0 '\0',
inheritance = 0 '\0', read_ahead = 0 '\0', wired_count = 0, next_read = 0,
cred = 0x0}, lock = {lock_object = {lo_name = 0xc0fc6c80 "vm map (user)",
lo_flags = 36896768, lo_data = 0, lo_witness = 0xce0022b0},
sx_lock = 1}, system_mtx = {lock_object = {
lo_name = 0xc0fc6c52 "vm map (system)", lo_flags = 21168128,
lo_data = 0, lo_witness = 0xce002110}, mtx_lock = 4}, nentries = 1,
size = 85229568, timestamp = 5202, needs_wakeup = 0 '\0',
system_map = 1 '\001', flags = 0 '\0', root = 0xc21ce630, pmap = 0xc13279f8,
busy = 0}
Current language: auto; currently minimal
(kgdb) p *bio_transient_map
Error accessing memory address 0x0: Bad address.
(kgdb) root@d129:~ # ^Dexit
Script done on Thu Mar 21 10:44:35 2013
Script started on Thu Mar 21 10:46:18 2013
root@d129:~ # uname -a
FreeBSD g1-235.catwhisker.org 10.0-CURRENT FreeBSD 10.0-CURRENT #845
r248575M/248575: Thu Mar 21 05:35:06 PDT 2013
r...@g1-235.catwhisker.org:/usr/obj/usr/src/sys/CANARY i386
root@d129:~ # sysctl vfs.unmapped_buf_allowed
vfs.unmapped_buf_allowed: 1
root@d129:~ # sysctl kern.nbuf
kern.nbuf: 7224
root@d129:~ # kgdb /boot/kernel/kernel /dev/mem
GNU gdb 6.1.1 [FreeBSD]
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB. Type "show warranty" for details.
This GDB was configured as "i386-marcel-freebsd"...
Reading symbols from /boot/kernel/linux.ko...Reading symbols from
/boot/kernel/linux.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/linux.ko
Reading symbols from /boot/kernel/coretemp.ko...Reading symbols from
/boot/kernel/coretemp.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/coretemp.ko
Reading symbols from /boot/kernel/iwn5000fw.ko...Reading symbols from
/boot/kernel/iwn5000fw.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/iwn5000fw.ko
Reading symbols from /boot/kernel/tmpfs.ko...Reading symbols from
/boot/kernel/tmpfs.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/tmpfs.ko
Reading symbols from /boot/kernel/fdescfs.ko...Reading symbols from
/boot/kernel/fdescfs.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/fdescfs.ko
#0 sched_switch (td=0xc1312a70, newtd=0xcd98b600, flags=-1048441924)
at /usr/src/sys/kern/sched_ule.c:1954
1954 cpuid = PCPU_GET(cpuid);
(kgdb) p *buffer_map
$1 = {header = {prev = 0xc19ceb88, next = 0xc19ceb88, left = 0x0, right = 0x0,
start = 3925868544, end = 4044226560, avail_ssize = 0, adj_free = 0,
max_free = 0, object = {vm_object = 0x0, sub_map = 0x0}, offset = 0,
eflags = 0, protection = 0 '\0', max_protection = 0 '\0',
inheritance = 0 '\0', read_ahead = 0 '\0', wired_count = 0, next_read = 0,
cred = 0x0}, lock = {lock_object = {lo_name = 0xc0fc6c80 "vm map (user)",
lo_flags = 36896768, lo_data = 0, lo_witness = 0xcd8022b0},
sx_lock = 1}, system_mtx = {lock_object = {
lo_name = 0xc0fc6c52 "vm map (system)", lo_flags = 21168128,
lo_data = 0, lo_witness = 0xcd802110}, mtx_lock = 4}, nentries = 1,
size = 8765440, timestamp = 535, needs_wakeup = 0 '\0',
system_map = 1 '\001', flags = 0 '\0', root = 0xc19ceb88, pmap = 0xc13279f8,
busy = 0}
Current language: auto; currently minimal
(kgdb) p *bio_transient_map
$2 = {header = {prev = 0xc19c1230, next = 0xc19c1230, left = 0x0, right = 0x0,
start = 4044226560, end = 4135583744, avail_ssize = 0, adj_free = 0,
max_free = 0, object = {vm_object = 0x0, sub_map = 0x0}, offset = 0,
eflags = 0, protection = 0 '\0', max_protection = 0 '\0',
inheritance = 0 '\0', read_ahead = 0 '\0', wired_count = 0, next_read = 0,
cred = 0x0}, lock = {lock_object = {lo_name = 0xc0fc6c80 "vm map (user)",
lo_flags = 36896768, lo_data = 0, lo_witness = 0xcd8022b0},
sx_lock = 1}, system_mtx = {lock_object = {
lo_name = 0xc0fc6c52 "vm map (system)", lo_flags = 21168128,
lo_data = 0, lo_witness = 0xcd802110}, mtx_lock = 4}, nentries = 0,
size = 0, timestamp = 0, needs_wakeup = 0 '\0', system_map = 1 '\001',
flags = 0 '\0', root = 0x0, pmap = 0xc13279f8, busy = 0}
(kgdb) root@d129:~ # ^Dexit
Script done on Thu Mar 21 10:47:34 2013
Script started on Thu Mar 21 10:49:39 2013
root@d129:~ # uname -a
FreeBSD g1-235.catwhisker.org 10.0-CURRENT FreeBSD 10.0-CURRENT #845
r248575M/248575: Thu Mar 21 05:35:06 PDT 2013
r...@g1-235.catwhisker.org:/usr/obj/usr/src/sys/CANARY i386
root@d129:~ # sysctl vfs.unmapped_buf_allowed kern.bio_transient_maxcnt
vfs.unmapped_buf_allowed: 1
kern.bio_transient_maxcnt: 256
root@d129:~ # kgdb /boot/kernel/kernel /dev/mem
GNU gdb 6.1.1 [FreeBSD]
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB. Type "show warranty" for details.
This GDB was configured as "i386-marcel-freebsd"...
Reading symbols from /boot/kernel/linux.ko...Reading symbols from
/boot/kernel/linux.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/linux.ko
Reading symbols from /boot/kernel/coretemp.ko...Reading symbols from
/boot/kernel/coretemp.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/coretemp.ko
Reading symbols from /boot/kernel/iwn5000fw.ko...Reading symbols from
/boot/kernel/iwn5000fw.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/iwn5000fw.ko
Reading symbols from /boot/kernel/tmpfs.ko...Reading symbols from
/boot/kernel/tmpfs.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/tmpfs.ko
Reading symbols from /boot/kernel/fdescfs.ko...Reading symbols from
/boot/kernel/fdescfs.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/fdescfs.ko
#0 sched_switch (td=0xc1312a70, newtd=0xcd98b600, flags=-1048441924)
at /usr/src/sys/kern/sched_ule.c:1954
1954 cpuid = PCPU_GET(cpuid);
(kgdb) p *buffer_map
$1 = {header = {prev = 0xf64f4750, next = 0xf64f4750, left = 0x0, right = 0x0,
start = 3925868544, end = 4044226560, avail_ssize = 0, adj_free = 0,
max_free = 0, object = {vm_object = 0x0, sub_map = 0x0}, offset = 0,
eflags = 0, protection = 0 '\0', max_protection = 0 '\0',
inheritance = 0 '\0', read_ahead = 0 '\0', wired_count = 0, next_read = 0,
cred = 0x0}, lock = {lock_object = {lo_name = 0xc0fc6c80 "vm map (user)",
lo_flags = 36896768, lo_data = 0, lo_witness = 0xcd8022b0},
sx_lock = 1}, system_mtx = {lock_object = {
lo_name = 0xc0fc6c52 "vm map (system)", lo_flags = 21168128,
lo_data = 0, lo_witness = 0xcd802110}, mtx_lock = 4}, nentries = 1,
size = 8814592, timestamp = 538, needs_wakeup = 0 '\0',
system_map = 1 '\001', flags = 0 '\0', root = 0xf64f4750, pmap = 0xc13279f8,
busy = 0}
Current language: auto; currently minimal
(kgdb) p *bio_transienty_ _map
$2 = {header = {prev = 0xc19c1230, next = 0xc19c1230, left = 0x0, right = 0x0,
start = 4044226560, end = 4077780992, avail_ssize = 0, adj_free = 0,
max_free = 0, object = {vm_object = 0x0, sub_map = 0x0}, offset = 0,
eflags = 0, protection = 0 '\0', max_protection = 0 '\0',
inheritance = 0 '\0', read_ahead = 0 '\0', wired_count = 0, next_read = 0,
cred = 0x0}, lock = {lock_object = {lo_name = 0xc0fc6c80 "vm map (user)",
lo_flags = 36896768, lo_data = 0, lo_witness = 0xcd8022b0},
sx_lock = 1}, system_mtx = {lock_object = {
lo_name = 0xc0fc6c52 "vm map (system)", lo_flags = 21168128,
lo_data = 0, lo_witness = 0xcd802110}, mtx_lock = 4}, nentries = 0,
size = 0, timestamp = 0, needs_wakeup = 0 '\0', system_map = 1 '\001',
flags = 0 '\0', root = 0x0, pmap = 0xc13279f8, busy = 0}
(kgdb) root@d129:~ # ^Dexit
Script done on Thu Mar 21 10:50:47 2013
Script started on Thu Mar 21 10:52:46 2013
root@d129:~ # uname -a
FreeBSD g1-235.catwhisker.org 10.0-CURRENT FreeBSD 10.0-CURRENT #845
r248575M/248575: Thu Mar 21 05:35:06 PDT 2013
r...@g1-235.catwhisker.org:/usr/obj/usr/src/sys/CANARY i386
root@d129:~ # sysctl vfs.unmapped_buf_allowed kern.bio_transient_mac[Kxcnt
vfs.unmapped_buf_allowed: 1
kern.bio_transient_maxcnt: 256
root@d129:~ # kgdb /boot/kernel/kernel /dev/meme[K
GNU gdb 6.1.1 [FreeBSD]
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB. Type "show warranty" for details.
This GDB was configured as "i386-marcel-freebsd"...
Reading symbols from /boot/kernel/linux.ko...Reading symbols from
/boot/kernel/linux.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/linux.ko
Reading symbols from /boot/kernel/coretemp.ko...Reading symbols from
/boot/kernel/coretemp.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/coretemp.ko
Reading symbols from /boot/kernel/iwn5000fw.ko...Reading symbols from
/boot/kernel/iwn5000fw.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/iwn5000fw.ko
Reading symbols from /boot/modules/nvidia.ko...done.
Loaded symbols for /boot/modules/nvidia.ko
Reading symbols from /boot/kernel/tmpfs.ko...Reading symbols from
/boot/kernel/tmpfs.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/tmpfs.ko
Reading symbols from /boot/kernel/fdescfs.ko...Reading symbols from
/boot/kernel/fdescfs.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/fdescfs.ko
#0 sched_switch (td=0xc1312a70, newtd=0xce18b600, flags=-1040053316)
at /usr/src/sys/kern/sched_ule.c:1954
1954 cpuid = PCPU_GET(cpuid);
(kgdb) p *buffer_map
$1 = {header = {prev = 0xc21cfd80, next = 0xc21cfd80, left = 0x0, right = 0x0,
start = 3934257152, end = 4052615168, avail_ssize = 0, adj_free = 0,
max_free = 0, object = {vm_object = 0x0, sub_map = 0x0}, offset = 0,
eflags = 0, protection = 0 '\0', max_protection = 0 '\0',
inheritance = 0 '\0', read_ahead = 0 '\0', wired_count = 0, next_read = 0,
cred = 0x0}, lock = {lock_object = {lo_name = 0xc0fc6c80 "vm map (user)",
lo_flags = 36896768, lo_data = 0, lo_witness = 0xce0022b0},
sx_lock = 1}, system_mtx = {lock_object = {
lo_name = 0xc0fc6c52 "vm map (system)", lo_flags = 21168128,
lo_data = 0, lo_witness = 0xce002110}, mtx_lock = 4}, nentries = 1,
size = 8798208, timestamp = 537, needs_wakeup = 0 '\0',
system_map = 1 '\001', flags = 0 '\0', root = 0xc21cfd80, pmap = 0xc13279f8,
busy = 0}
Current language: auto; currently minimal
(kgdb) p *bio_transient_map
$2 = {header = {prev = 0xc21c1230, next = 0xc21c1230, left = 0x0, right = 0x0,
start = 4052615168, end = 4086169600, avail_ssize = 0, adj_free = 0,
max_free = 0, object = {vm_object = 0x0, sub_map = 0x0}, offset = 0,
eflags = 0, protection = 0 '\0', max_protection = 0 '\0',
inheritance = 0 '\0', read_ahead = 0 '\0', wired_count = 0, next_read = 0,
cred = 0x0}, lock = {lock_object = {lo_name = 0xc0fc6c80 "vm map (user)",
lo_flags = 36896768, lo_data = 0, lo_witness = 0xce0022b0},
sx_lock = 1}, system_mtx = {lock_object = {
lo_name = 0xc0fc6c52 "vm map (system)", lo_flags = 21168128,
lo_data = 0, lo_witness = 0xce002110}, mtx_lock = 4}, nentries = 0,
size = 0, timestamp = 0, needs_wakeup = 0 '\0', system_map = 1 '\001',
flags = 0 '\0', root = 0x0, pmap = 0xc13279f8, busy = 0}
(kgdb) ^Froot@d129:~ # ^Dexit
Script done on Thu Mar 21 10:53:52 2013
pgpGkrrdGPpkN.pgp
Description: PGP signature
