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* devstat_selectdevs: resize dev_select only after copying data out of itAndriy Gapon2019-12-031-2/+7
| | | | | | | | | | | The resizing could be a downsizing so some data would be lost and we could attempt to read past the end of the new memory allocation. MFC after: 2 weeks Sponsored by: Panzura Notes: svn path=/head/; revision=355325
* lib: further adoption of SPDX licensing ID tags.Pedro F. Giffuni2017-11-261-1/+3
| | | | | | | | | | | | | | | Mainly focus on files that use BSD 2-Clause license, however the tool I was using mis-identified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. Notes: svn path=/head/; revision=326219
* Remove unused variable and silence clang warnings.Marcelo Araujo2015-06-041-2/+0
| | | | | | | | Differential Revision: D2681 Reviewed by: rodrigc Notes: svn path=/head/; revision=283976
* Remove an obsolete comment in devstat(3) about the accuracy of theKenneth D. Merry2015-02-271-21/+3
| | | | | | | | | | | | | | | | | milliseconds per transaction (DSM_MS_PER_TRANSACTION) calculation. The comment was accurate many years ago when the kernel didn't record I/O times on a per-I/O basis, but now that we do collect that information in most areas, it isn't correct. The milliseconds per transaction values are correct, assuming the I/O duration has been recorded. Sponsored by: Spectra Logic MFC after: 3 days Notes: svn path=/head/; revision=279346
* Fix a typo.Sergey Kandaurov2013-12-251-1/+1
| | | | Notes: svn path=/head/; revision=259883
* For vmcore, calculate time relative to device creation upon time_uptime.Sergey Kandaurov2013-12-251-4/+11
| | | | | | | | | Previously it used a clock from live kernel. MFC after: 2 weeks Notes: svn path=/head/; revision=259878
* New devstat metrics for devstat_compute_statistics():Mikolaj Golub2012-12-151-8/+39
| | | | | | | | | | | | DSM_TOTAL_DURATION DSM_TOTAL_DURATION_READ DSM_TOTAL_DURATION_WRITE DSM_TOTAL_DURATION_FREE DSM_TOTAL_DURATION_OTHER DSM_TOTAL_BUSY_TIME Notes: svn path=/head/; revision=244270
* Handle memory allocation failures in devstat_getdevs(), devstat_selectdevs(),Guy Helmer2012-01-061-10/+30
| | | | | | | | | | and devstat_buildmatch(). PR: bin/83359 Reviewed by: ken Notes: svn path=/head/; revision=229735
* Do not increment num_args if strsep(3) returned an empty field.Sergey Kandaurov2011-04-041-3/+4
| | | | | | | | | | That fixes devstat_buildmatch(3) crashes with certain strings. Reported by: arundel MFC after: 2 weeks Notes: svn path=/head/; revision=220319
* Remove an unused variable.Stefan Farfeleder2005-10-041-2/+1
| | | | | | | Reviewed by: ken Notes: svn path=/head/; revision=150948
* Use __func__ throughout devstat.c instead of defining a func_nameMaxime Henrion2005-04-261-31/+21
| | | | | | | variable in each function. Notes: svn path=/head/; revision=145553
* Make this compile with GCC4 by fixing a signedness issue.Maxime Henrion2005-04-261-1/+1
| | | | | | | Reviewed by: md5(1) Notes: svn path=/head/; revision=145549
* Remove the use of cast as lvalue. GCC 3.4 isses a deprecation warningAlexander Kabaev2004-06-251-1/+1
| | | | | | | for this now. Notes: svn path=/head/; revision=131075
* Include <nlist.h> for nlist-related declarations instead of depending onBruce Evans2003-10-131-0/+1
| | | | | | | namespace pollution in <kvm.h>. Notes: svn path=/head/; revision=121064
* It is not an error to have no devices.Poul-Henning Kamp2003-08-171-1/+1
| | | | Notes: svn path=/head/; revision=119029
* Add prototype for compute_stats() so that libdevstat is WARNS=4 clean.Poul-Henning Kamp2003-04-191-0/+8
| | | | | | | Spotted by: kris Notes: svn path=/head/; revision=113710
* If rounding results in -epsilon device busy %, set it to zero.Poul-Henning Kamp2003-04-091-0/+2
| | | | Notes: svn path=/head/; revision=113281
* typoPoul-Henning Kamp2003-03-191-1/+1
| | | | Notes: svn path=/head/; revision=112406
* Further unbreak devstat: sort the index array in correct order too.Poul-Henning Kamp2003-03-191-10/+10
| | | | Notes: svn path=/head/; revision=112405
* Add more devstat calculations, mostly filling in holes, but also addingPoul-Henning Kamp2003-03-181-25/+117
| | | | | | | | | | | | | 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 Notes: svn path=/head/; revision=112373
* And I managed to make a regression here too.Poul-Henning Kamp2003-03-151-5/+5
| | | | | | | I have too many source trees :-( Notes: svn path=/head/; revision=112293
* Run a revision of the devstat interface:Poul-Henning Kamp2003-03-151-94/+32
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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 Notes: svn path=/head/; revision=112288
* Remove include of <sys/dkstat.h>Poul-Henning Kamp2003-02-161-1/+0
| | | | Notes: svn path=/head/; revision=111000
* Premptively include <sys/resource.h> to get the cp_time[CPUSTATES].Poul-Henning Kamp2003-02-161-0/+1
| | | | Notes: svn path=/head/; revision=110998
* Remove 'register' keyword.David E. O'Brien2002-03-211-2/+2
| | | | Notes: svn path=/head/; revision=92913
* Turn on WARNS?= 2 for libdevstat.Kenneth D. Merry2001-09-231-23/+27
| | | | | | | Submitted by: "Sergey A. Osokin" <osa@freebsd.org.ru> Notes: svn path=/head/; revision=83868
* Implement __FBSDID()Matthew Dillon2001-09-161-2/+3
| | | | Notes: svn path=/head/; revision=83551
* Fix some style inconsistencies introduced in rev 1.10, as well as someKenneth D. Merry2001-08-211-34/+36
| | | | | | | | other inconsistencies that I missed in my review of rev 1.7. Also fix a cut-n-paste error from an earlier revision. Notes: svn path=/head/; revision=82028
* Better snprintf() handling.Brian Somers2001-08-201-38/+23
| | | | | | | Prompted by: bde Notes: svn path=/head/; revision=81984
* Handle snprintf() returning -1.Brian Somers2001-08-201-2/+4
| | | | | | | MFC after: 2 weeks Notes: svn path=/head/; revision=81972
* Implement compute_stats() in terms of devstat_compute_statistics(). ThisKenneth D. Merry2001-08-181-104/+28
| | | | | | | | | | | | | | 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> Notes: svn path=/head/; revision=81883
* Add some features to libdevstat, and overhaul the interface a bit:Thomas Moestl2001-08-041-102/+657
| | | | | | | | | | | | | | | | | | | | | | | | 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 Notes: svn path=/head/; revision=81133
* $Id$ -> $FreeBSD$Peter Wemm1999-08-281-1/+1
| | | | Notes: svn path=/head/; revision=50476
* Address our users in a civilized manner. (They may know better, but probablyPoul-Henning Kamp1999-03-221-11/+5
| | | | | | | just forgot it, it is certainly no reason to don't insult them.) Notes: svn path=/head/; revision=44936
* Fix a couple of potential buffer overrun cases.Kenneth D. Merry1998-10-141-4/+8
| | | | | | | Submitted by: imp Notes: svn path=/head/; revision=40364
* Change the devstat generation number from an int to a long. The int-sizedKenneth D. Merry1998-09-201-13/+14
| | | | | | | | | | | | | 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> Notes: svn path=/head/; revision=39498
* Fix some error message format problems in checkversion() and getversion().Kenneth D. Merry1998-09-181-8/+35
| | | | | | | Reported By: bde Notes: svn path=/head/; revision=39451
* Device statistics library. Used by iostat, vmstat, and systat toJustin T. Gibbs1998-09-151-0/+1102
format and analyze the output of the new device statistics sysctls. Submitted by: "Kenneth D. Merry" <ken@FreeBSD.org> Notes: svn path=/head/; revision=39211
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