Commit Graph

46 Commits

Author SHA1 Message Date
Poul-Henning Kamp
ec0fa09c8c typo 2003-03-19 14:15:32 +00:00
Poul-Henning Kamp
773865de4e Further unbreak devstat: sort the index array in correct order too. 2003-03-19 14:11:14 +00:00
Poul-Henning Kamp
cb3733b78d ARGH!
Pointy hat to:	phk
2003-03-18 17:05:27 +00:00
Poul-Henning Kamp
0d2fdd7850 Commit ken@' changes to this file: Bump version and append new entries
to stay backwards compatible.
2003-03-18 16:44:10 +00:00
Poul-Henning Kamp
b193011a02 Update to match reality closer. 2003-03-18 13:45:08 +00:00
Poul-Henning Kamp
36eab1f55a Add more devstat calculations, mostly filling in holes, but also adding
a couple of reqests:  DSM_BUSY_PCT and DSM_QUEUE_LENGTH.

I have no further plans for mutilating this API at this point in
time, and will update the man-page to reflect current reality as
the next thing.

Reviewed by:    ken
2003-03-18 09:57:54 +00:00
Poul-Henning Kamp
16830b0cc2 And I managed to make a regression here too.
I have too many source trees :-(
2003-03-15 22:22:11 +00:00
Poul-Henning Kamp
7194d335cf Run a revision of the devstat interface:
Kernel:

Change statistics to use the *uptime() timescale (ie: relative to
boottime) rather than the UTC aligned timescale.  This makes the
device statistics code oblivious to clock steps.

Change timestamps to bintime format, they are cheaper.

Remove the "busy_count", and replace it with two counter fields:
"start_count" and "end_count", which are updated in the down and
up paths respectively.  This removes the locking constraint on
devstat.

Add a timestamp argument to devstat_start_transaction(), this will
normally be a timestamp set by the *_bio() function in bp->bio_t0.
Use this field to calculate duration of I/O operations.

Add two timestamp arguments to devstat_end_transaction(), one is
the current time, a NULL pointer means "take timestamp yourself",
the other is the timestamp of when this transaction started (see
above).

Change calculation of busy_time to operate on "the salami principle":
Only when we are idle, which we can determine by the start+end
counts being identical, do we update the "busy_from" field in the
down path.  In the up path we accumulate the timeslice in busy_time
and update busy_from.

Change the byte_* and num_* fields into two arrays: bytes[] and
operations[].

Userland:

Change the misleading "busy_time" name to be called "snap_time" and
make the time long double since that is what most users need anyway,
fill it using clock_gettime(CLOCK_MONOTONIC) to put it on the same
timescale as the kernel fields.

Change devstat_compute_etime() to operate on struct bintime.

Remove the version 2 legacy interface: the change to bintime makes
compatibility far too expensive.

Fix a bug in systat's "vm" page where boot relative busy times would
be bogus.

Bump __FreeBSD_version to 500107

Review & Collaboration by:	ken
2003-03-15 21:59:06 +00:00
Poul-Henning Kamp
4a8bd1668b Don't tell people to include <sys/dkstat.h> any more.
Pointed out by:	kuriyama
2003-02-19 06:33:37 +00:00
Poul-Henning Kamp
cd9c9ca63d Remove include of <sys/dkstat.h> 2003-02-16 14:08:52 +00:00
Poul-Henning Kamp
1259069021 Premptively include <sys/resource.h> to get the cp_time[CPUSTATES]. 2003-02-16 13:29:28 +00:00
Peter Wemm
224af215a6 Zap now-unused SHLIB_MINOR 2002-09-28 00:25:32 +00:00
David E. O'Brien
be04b6d190 Remove 'register' keyword. 2002-03-21 23:39:28 +00:00
Bruce Evans
0f393d5ccb Fixed wrong arg type in synopsis. 2001-10-03 03:57:42 +00:00
Ruslan Ermilov
32eef9aeb1 mdoc(7) police: Use the new .In macro for #include statements. 2001-10-01 16:09:29 +00:00
Kenneth D. Merry
c3508206b2 Turn on WARNS?= 2 for libdevstat.
Submitted by:	"Sergey A. Osokin" <osa@freebsd.org.ru>
2001-09-23 23:03:23 +00:00
Matthew Dillon
e67f5b9fca Implement __FBSDID() 2001-09-16 21:35:07 +00:00
Kenneth D. Merry
b915499708 Remove a duplicate "that".
Submitted by:	"Sergey A. Osokin" <osa@freebsd.org.ru>
2001-08-24 02:24:58 +00:00
Ruslan Ermilov
265c01df49 mdoc(7) police: Fixed broken xrefs. 2001-08-22 14:16:31 +00:00
Kenneth D. Merry
4fb9d38429 Fix some style inconsistencies introduced in rev 1.10, as well as some
other inconsistencies that I missed in my review of rev 1.7.  Also fix
a cut-n-paste error from an earlier revision.
2001-08-21 05:23:37 +00:00
Brian Somers
6d3e1426db Better snprintf() handling.
Prompted by: bde
2001-08-20 15:43:14 +00:00
Brian Somers
2449bf28ad Handle snprintf() returning -1.
MFC after:	2 weeks
2001-08-20 12:50:21 +00:00
Kenneth D. Merry
884539f701 Implement compute_stats() in terms of devstat_compute_statistics(). This
gets rid of the duplicated code in compute_stats().

Add a new DSM_SKIP statistic type for devstat_compute_statistics() that
causes the subsequent variable argument to be skipped.

Thanks to Sergey Osokin for coding up my idea/code fragment.

Submitted by:	"Sergey A. Osokin" <osa@freebsd.org.ru>
2001-08-18 05:46:59 +00:00
Thomas Moestl
c4a5ef6ef3 Add some features to libdevstat, and overhaul the interface a bit:
1.) prefix all functions in the library with devstat_ (compatability
    functions are available for all functions that were chaned in an
    incompatible way, but are deprecated).
2.) Add a pointer to a kvm_t as the first argument to functions that
    used to get their information via sysctl; they behave the same
    as before when NULL is passed as this argument, otherwise, the
    information is obtained via libkvm using the supplied handle.
3.) Add a new function, devstat_compute_statistics(), that is intended
    to replace the old compute_stats() function. It offers more
    statistics data, and has a more flexible interface.

libdevstat does now require libkvm; a library depedency is added, so
that libkvm only needs to be explicitely specified for statically linked
programs.
The library major version number is bumped.

Submitted by:	Sergey A. Osokin <osa@freebsd.org.ru>, ken (3)
Reviewed by:	ken
2001-08-04 18:25:48 +00:00
Dima Dorfman
7ebcc426ef Remove whitespace at EOL. 2001-07-15 07:53:42 +00:00
Ruslan Ermilov
a307d59838 mdoc(7) police: removed HISTORY info from the .Os call. 2001-07-10 13:41:46 +00:00
Ruslan Ermilov
3ab9a9d0e0 Removed -I${.CURDIR}/.../sys from CFLAGS. 2001-05-18 13:41:42 +00:00
Ruslan Ermilov
4a558355e5 MAN[1-9] -> MAN. 2001-03-27 17:27:19 +00:00
Ruslan Ermilov
d0353b836e mdoc(7) police: split punctuation characters + misc fixes. 2001-02-01 16:38:02 +00:00
Ruslan Ermilov
4263595653 Prepare for mdoc(7)NG. 2000-12-29 14:08:20 +00:00
Ruslan Ermilov
ed40311694 mdoc(7) police: removed history info from the .Os FreeBSD call. 2000-12-14 11:52:05 +00:00
Ruslan Ermilov
3b8ecdbbbe mdoc(7) police: use the new features of the Nm macro. 2000-11-20 14:08:07 +00:00
Alexey Zelkin
9d5b4f83cc Introduce .Lb macro to libdevstat library manpage 2000-04-22 15:58:01 +00:00
Rodney W. Grimes
d05257b0f2 Replace beforeinstall target with new variables used by .mk system.
Reviewed by:	marcel, and make world
2000-01-14 07:57:47 +00:00
Kenneth D. Merry
6f83979d1f Clarify what getdevs() expects as input.
Prompted by:	grog
1999-09-23 06:36:02 +00:00
Alexey Zelkin
b27e4ff392 Synchronization of NAME and SINOPSYS sections.
mdoc(7)'fy
1999-09-21 19:22:30 +00:00
Peter Wemm
7f3dea244c $Id$ -> $FreeBSD$ 1999-08-28 00:22:10 +00:00
Kenneth D. Merry
7c903b3d7e Add a MAINTAINER line to modules that I maintain.
Suggested by:	brian, markm
1999-06-18 00:41:47 +00:00
Poul-Henning Kamp
057cfd176a Address our users in a civilized manner. (They may know better, but probably
just forgot it, it is certainly no reason to don't insult them.)
1999-03-22 10:38:07 +00:00
Bruce Evans
aedadd1cb9 Fixed missing header in synopsis (<devstat.h> unfortunately depends on
<sys/dkstat.h>).
1999-03-05 17:14:05 +00:00
David E. O'Brien
1108d69cee add MLINKs for all the functions covered by the manpage 1999-01-06 05:00:17 +00:00
David E. O'Brien
5db9ad2cb0 spell check 1999-01-06 04:59:53 +00:00
Kenneth D. Merry
17ee2b2055 Fix a couple of potential buffer overrun cases.
Submitted by:	imp
1998-10-14 23:28:26 +00:00
Kenneth D. Merry
bcc6a3da92 Change the devstat generation number from an int to a long. The int-sized
generation was causing unaligned access faults on the Alpha.

I have incremented the devstat version number, since this is an interface
change.  You'll need to recompile libdevstat, systat, iostat, vmstat and
rpc.rstatd along with your kernel.

Partially Submitted by:	Andrew Gallatin <gallatin@cs.duke.edu>
1998-09-20 00:11:23 +00:00
Kenneth D. Merry
eded794a13 Fix some error message format problems in checkversion() and getversion().
Reported By: bde
1998-09-18 02:35:25 +00:00
Justin T. Gibbs
28fb27ba21 Device statistics library. Used by iostat, vmstat, and systat to
format and analyze the output of the new device statistics sysctls.

Submitted by:	"Kenneth D. Merry" <ken@FreeBSD.org>
1998-09-15 06:23:21 +00:00