Mark Murray scribbled this message on Aug 22:
Does anyone know an inexpensive algorithm (O(1)) to go from an number to
the next (lower or higher) power of two.
1 - 1
2,3 - 2
4,5,6,7 - 4
8,9,10,11,12,13,14,15 - 8
etc.
I was wondering if someone would like to clean up a bit of shell scripting
I wrote to attach a report of the defect list to the daily output... it
works great so far and thought I might as well share this w/ the rest of
people...
once it gets cleaned up, I have no problems w/ committing it to
John-Mark Gurney wrote:
Shift a bit until it becomes greater than (or less than) the number
in question.
ummm, didn't you read his post?? he wanted a O(1) routine, NOT a O(n)
routine...
That technique is O(ln(n)), where n is the number in question.
Frankly, for numbers up to 32, a
hi,
Which tools can be used to edit syscons fonts ?
Any references are welcome!
--
Sincerely Yours, | [EMAIL PROTECTED] (primary)
Alexey Zelkin | [EMAIL PROTECTED] (home)
| ICQ: #6196584, FIDO: 2:460/12.26
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Alexey M. Zelkin wrote:
hi,
Which tools can be used to edit syscons fonts ?
Any of the tools you use to edit the DOS fonts.
My favorite one it Evafont by Pete Kvitek. But
there were a lot of tools floating around.
-SB
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On Fri, 20 Aug 1999, Matthew Dillon wrote:
: Just to be clear... I am wondering if mounting (on the NFS _server_) a
: partition (that is exportable) as async will have any performance
: benefits to the NFS clients?
:
:As a first guess, probably not unless you have a large number of active
I had always wondered how select/poll worked (actually see the end of the
mail to see the broader question), so I pulled up select() and family
and started reading and chasing stuff around. I think that I fully
understand (much praise to whoever wrote most of that, it was incredibly
easy to
I've just found a need for mandatory locking in Vinum, and I'm
wondering how to implement it. If I understand things correctly, our
fcntl locking doesn't perform mandatory locking, though System V does
if you set the file permissions appropriately.
Questions:
1. Do we have some form of
On Sunday, 22 August 1999 at 17:31:44 -0700, Matthew Dillon wrote:
Questions:
1. Do we have some form of mandatory locking? If so, what is it?
No we don't, unless you count the ad-hoc lockout in the master/slave pty
interface :-).
2. Would it make sense to implement System
In file uipc_usrreq.c, there are many routines beginning with unp_. For
example, unp_connect(), unp_bind(), etc. What does unp stand for?
Thanks.
--
Zhihui Zhang. Please visit http://www.freebsd.org
Matthew Dillon wrote:
:Now I've got to go figure out what *I've* screwed up. I fstat the file before
:mapping it and pass S.st_size as the map length. Is there any reason why
:mmap would return non-NULL but map less than the requested size?
:
:Scratching my head,
Note that mmap()
On Sunday, 22 August 1999 at 22:07:04 -0400, Garrett Wollman wrote:
On Mon, 23 Aug 1999 10:06:54 +0930, Greg Lehey [EMAIL PROTECTED] said:
Correct. I suppose it's worth discussing what the default should be.
Should they get EAGAIN or block? Obviously you'd want a way of
specifying which,
:Somehow you need to get a lock.
:
: You mean have one program make a fcntl call that causes other
: programs to return an error or block if they try to open that
: file while the first program holds an open descriptor?
:
:Correct. I suppose it's worth discussing what the default
On Sunday, 22 August 1999 at 22:04:38 -0700, Matthew Dillon wrote:
Somehow you need to get a lock.
You mean have one program make a fcntl call that causes other
programs to return an error or block if they try to open that
file while the first program holds an open descriptor?
According to Brian F. Feldman:
-O lets you do explicit inlining, and -O2 enables -finline-functions.
You meant -O3 of course.
-O3Optimize yet more. This turns on everything -O2
does, along with also turning on -finline-func-
tions.
--
Ollivier
In message [EMAIL PROTECTED], Greg Lehey writes:
Why should it be made unavailable ?
So that certain multiple accesses can be done atomically.
You don't need that. You initialize a index to 0, and whenever
the sector with that index is written, you increment it.
At any one time you know
Following my previous post:
I wrote ..
I believe a reversed dataset would be partitioned
into two subpartitions sorted in order at the 1'st pass of
the partitionings. Is this incorrect ?
Sorry, I'd confirmed BSD qsort's partitioning logic does not
guarantee that a reversed dataset would be
Does anyone know an inexpensive algorithm (O(1)) to go from an number to
the next (lower or higher) power of two.
1 - 1
2,3 - 2
4,5,6,7 - 4
8,9,10,11,12,13,14,15 - 8
etc.
So %1101 should become either %1 or %1000.
Shift a
Mark Murray scribbled this message on Aug 22:
Does anyone know an inexpensive algorithm (O(1)) to go from an number to
the next (lower or higher) power of two.
1 - 1
2,3 - 2
4,5,6,7 - 4
8,9,10,11,12,13,14,15 - 8
etc.
I was wondering if someone would like to clean up a bit of shell scripting
I wrote to attach a report of the defect list to the daily output... it
works great so far and thought I might as well share this w/ the rest of
people...
once it gets cleaned up, I have no problems w/ committing it to the
It seems that all the solutions are too generic and slow. As I only have
to check the numbers 0-32 (actually 1-32), a block of if statements is
almost as fast as a table look up in 33 elements.
Cheers,
Nick
On Sun, 22 Aug 1999, Mark Murray wrote:
Does anyone know an inexpensive algorithm
I had always wondered how select/poll worked (actually see the end of the
mail to see the broader question), so I pulled up select() and family
and started reading and chasing stuff around. I think that I fully
understand (much praise to whoever wrote most of that, it was incredibly
easy to read)
John-Mark Gurney wrote:
Shift a bit until it becomes greater than (or less than) the number
in question.
ummm, didn't you read his post?? he wanted a O(1) routine, NOT a O(n)
routine...
That technique is O(ln(n)), where n is the number in question.
Frankly, for numbers up to 32, a
Chris wrote:
I am glad to hear from Soren that this 'misconfiguration' will be
supported in 4.0
As always when a misconfiguration (read 'not to spec') is used enough
then it quickly becomes somewhat of a de facto standard.
Old message, but still in need for reply.
Yeah, like isa shared
It seems that all the solutions are too generic and slow. As I only have
to check the numbers 0-32 (actually 1-32), a block of if statements is
almost as fast as a table look up in 33 elements.
I doubt it - use the table for a small fixed size set then
use Warner's (n) ? (1 (ffs(n) - 1)) : 0.
Daniel C. Sobral d...@newsguy.com wrote
That technique is O(ln(n)), where n is the number in question.
Frankly, for numbers up to 32, a table will wield the best results,
and might actually be smaller than some of the suggestions given so
far.
Counting n as bit, it is O(n) :p
Unrolling
Unfortunately the kernel is compiled with -O which does not include
inlining (dunno about explicit inlining, but don't think so).
Nick
On Sun, 22 Aug 1999, Peter Dufault wrote:
It seems that all the solutions are too generic and slow. As I only have
to check the numbers 0-32 (actually
--- Kazufumi-MIT-Mitani m...@mit-s.otaru-uc.ac.jp skrev:
Daniel C. Sobral d...@newsguy.com wrote
That technique is O(ln(n)), where n is the number in question.
Frankly, for numbers up to 32, a table will wield the best results,
and might actually be smaller than some of the
hi,
Which tools can be used to edit syscons fonts ?
Any references are welcome!
--
Sincerely Yours, | phan...@crimea.edu (primary)
Alexey Zelkin | phan...@scorpion.crimea.ua (home)
| ICQ: #6196584, FIDO: 2:460/12.26
To Unsubscribe: send mail to
Alexey M. Zelkin wrote:
hi,
Which tools can be used to edit syscons fonts ?
Any of the tools you use to edit the DOS fonts.
My favorite one it Evafont by Pete Kvitek. But
there were a lot of tools floating around.
-SB
To Unsubscribe: send mail to majord...@freebsd.org
with unsubscribe
On Fri, 20 Aug 1999, Matthew Dillon wrote:
: Just to be clear... I am wondering if mounting (on the NFS _server_) a
: partition (that is exportable) as async will have any performance
: benefits to the NFS clients?
:
:As a first guess, probably not unless you have a large number of active
: buffer cache is able to keep abrest of the write-rate.
:
: Hmm, interesting. I see another optimization I can do to fix the
: buffer cache saturation case in CURRENT on the client. The COMMIT rpc's
: aren't being issued async.
:
:You need to track the return value of the
Is anyone doing any work to support parallel video interfaces like
the Snappy or Gotcha cards? I have Snappy card, and I would like to put
it to use as part of an internal video security system.
--R. Pelletier,
Sys Admin, House Galiagante
To Unsubscribe: send mail to majord...@freebsd.org
with
On Sat, Aug 21, 1999 at 02:46:51AM -0400, Mike Nowlin wrote:
I had sent this message to -stable about a month ago, never heard anything
-- so am trying it here.
Hmm lpbb seem to fail completly then...
I have to give it a try. Ask me again if I fail to remember. I'm a bit busy.
Thanks for
According to Sergey Babkin:
Any of the tools you use to edit the DOS fonts.
My favorite one it Evafont by Pete Kvitek. But
there were a lot of tools floating around.
I know do the opposite. I modify the font with XmBDFED in BDF format then
generate the syscons font with a small Perl script. A
Peter Dufault wrote:
It seems that all the solutions are too generic and slow. As I only have
to check the numbers 0-32 (actually 1-32), a block of if statements is
almost as fast as a table look up in 33 elements.
I doubt it - use the table for a small fixed size set then
use Warner's
In the last episode (Aug 22), Sergey Babkin said:
Alexey M. Zelkin wrote:
hi,
Which tools can be used to edit syscons fonts ?
Any of the tools you use to edit the DOS fonts.
My favorite one it Evafont by Pete Kvitek. But
there were a lot of tools floating around.
I like one called
I had always wondered how select/poll worked (actually see the end of the
mail to see the broader question), so I pulled up select() and family
and started reading and chasing stuff around. I think that I fully
understand (much praise to whoever wrote most of that, it was incredibly
easy to
I've just found a need for mandatory locking in Vinum, and I'm
wondering how to implement it. If I understand things correctly, our
fcntl locking doesn't perform mandatory locking, though System V does
if you set the file permissions appropriately.
Questions:
1. Do we have some form of
On Sun, 22 Aug 1999, Nick Hibma wrote:
Unfortunately the kernel is compiled with -O which does not include
inlining (dunno about explicit inlining, but don't think so).
Nick
-O lets you do explicit inlining, and -O2 enables -finline-functions.
Anyway, I think the simple solution to the
:Questions:
:
:1. Do we have some form of mandatory locking? If so, what is it?
No we don't, unless you count the ad-hoc lockout in the master/slave pty
interface :-).
:2. Would it make sense to implement System V's fcntl semantics?
:They're rather tacky: you set the setgid bit
On Sunday, 22 August 1999 at 17:31:44 -0700, Matthew Dillon wrote:
Questions:
1. Do we have some form of mandatory locking? If so, what is it?
No we don't, unless you count the ad-hoc lockout in the master/slave pty
interface :-).
2. Would it make sense to implement System V's
In file uipc_usrreq.c, there are many routines beginning with unp_. For
example, unp_connect(), unp_bind(), etc. What does unp stand for?
Thanks.
--
Zhihui Zhang. Please visit http://www.freebsd.org
On Sun, 22 Aug 1999, Zhihui Zhang wrote:
In file uipc_usrreq.c, there are many routines beginning with unp_. For
example, unp_connect(), unp_bind(), etc. What does unp stand for?
guess
W. Richard Stevens wrote a book Unix Network Programming often refered
to by UNP, which includes his
Matthew Dillon wrote:
:Now I've got to go figure out what *I've* screwed up. I fstat the file
before
:mapping it and pass S.st_size as the map length. Is there any reason why
:mmap would return non-NULL but map less than the requested size?
:
:Scratching my head,
Note that mmap()
On Sun, 22 Aug 1999, Bill Fumerola wrote:
On Sun, 22 Aug 1999, Zhihui Zhang wrote:
In file uipc_usrreq.c, there are many routines beginning with unp_. For
example, unp_connect(), unp_bind(), etc. What does unp stand for?
guess
W. Richard Stevens wrote a book Unix Network Programming
The best I can come up with is this:
/* kk+1 k
* given n, return 2 such that 2 n = 2
*/
inline unsigned long
n2power2(unsigned long n)
{
/* `smear' the highest set bit to the right */
n |= n1; n |= n2; n |= n4; n |= n8; n |= n16;
On Mon, 23 Aug 1999 10:06:54 +0930, Greg Lehey g...@lemis.com said:
Correct. I suppose it's worth discussing what the default should be.
Should they get EAGAIN or block? Obviously you'd want a way of
specifying which, but there would have to be a default for
non-lock-aware programs. I
On Sunday, 22 August 1999 at 22:07:04 -0400, Garrett Wollman wrote:
On Mon, 23 Aug 1999 10:06:54 +0930, Greg Lehey g...@lemis.com said:
Correct. I suppose it's worth discussing what the default should be.
Should they get EAGAIN or block? Obviously you'd want a way of
specifying which, but
:Somehow you need to get a lock.
:
: You mean have one program make a fcntl call that causes other
: programs to return an error or block if they try to open that
: file while the first program holds an open descriptor?
:
:Correct. I suppose it's worth discussing what the default
I've been doing some housecleaning lately and I finally decided to set
up
a one-way ssh authentication from my workstation to my gateway machine. I
set up the ssh keys and that was all good. Then I went to start an X app on
the gateway expecting it to just pop up on the workstation's X
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