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freebsd-skq/sys/geom/geom_stats.h

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Move the g_stat struct to its own .h file, we will export it to other code. Insted of embedding a struct g_stat in consumers and providers, merely include a pointer. Remove a couple of <sys/time.h> includes now unneeded. Add a special allocator for struct g_stat. This allocator will allocate entire pages and hand out g_stat functions from there. The "id" field indicates free/used status. Add "/dev/geom.stats" device driver whic exports the pages from the allocator to userland with mmap(2) in read-only mode. This mmap(2) interface should be considered a non-public interface and the functions in libgeom (not yet committed) should be used to access the statistics data.
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/*-
* Copyright (c) 2002 Poul-Henning Kamp
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The names of the authors may not be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef _GEOM_GEOM_STATS_H_
#define _GEOM_GEOM_STATS_H_
Put the name of the /dev entry in the .h file, userland will need it.
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#define GEOM_STATS_DEVICE "geom.stats"
Move the g_stat struct to its own .h file, we will export it to other code. Insted of embedding a struct g_stat in consumers and providers, merely include a pointer. Remove a couple of <sys/time.h> includes now unneeded. Add a special allocator for struct g_stat. This allocator will allocate entire pages and hand out g_stat functions from there. The "id" field indicates free/used status. Add "/dev/geom.stats" device driver whic exports the pages from the allocator to userland with mmap(2) in read-only mode. This mmap(2) interface should be considered a non-public interface and the functions in libgeom (not yet committed) should be used to access the statistics data.
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/*
Update the statistics collection code to track busy time instead of idle time. Statistics now default to "on" and can be turned off with sysctl kern.geom.collectstats=0 Performance impact of statistics collection is on the order of 800 nsec per consumer/provider set on a 700MHz Athlon.
2003-02-09 17:04:57 +00:00
* A g_stat contains the statistics the kernel collect on consumers and
* providers. See libgeom(3) for how to get hold of these.
Move the g_stat struct to its own .h file, we will export it to other code. Insted of embedding a struct g_stat in consumers and providers, merely include a pointer. Remove a couple of <sys/time.h> includes now unneeded. Add a special allocator for struct g_stat. This allocator will allocate entire pages and hand out g_stat functions from there. The "id" field indicates free/used status. Add "/dev/geom.stats" device driver whic exports the pages from the allocator to userland with mmap(2) in read-only mode. This mmap(2) interface should be considered a non-public interface and the functions in libgeom (not yet committed) should be used to access the statistics data.
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*/
struct g_stat {
Turn the "updating" flag (back) into two sequence number fields at either ends of the structure so we have a way to determine if a snapshot is consistent.
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int seq0;
Update the statistics collection code to track busy time instead of idle time. Statistics now default to "on" and can be turned off with sysctl kern.geom.collectstats=0 Performance impact of statistics collection is on the order of 800 nsec per consumer/provider set on a 700MHz Athlon.
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/*
Turn the "updating" flag (back) into two sequence number fields at either ends of the structure so we have a way to determine if a snapshot is consistent.
2003-02-11 11:01:26 +00:00
* Sequence number, used with seq1 to determine
* if snapshot is consistent.
Update the statistics collection code to track busy time instead of idle time. Statistics now default to "on" and can be turned off with sysctl kern.geom.collectstats=0 Performance impact of statistics collection is on the order of 800 nsec per consumer/provider set on a 700MHz Athlon.
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*/
void *id;
/* GEOM-identifier for the consumer/provider */
uint64_t nop;
/* Number of requests started */
uint64_t nend;
/* Number of requests completed */
struct bintime bt;
/* Accumulated busy time */
struct bintime wentbusy;
/* Busy time accounted for until here */
Move the g_stat struct to its own .h file, we will export it to other code. Insted of embedding a struct g_stat in consumers and providers, merely include a pointer. Remove a couple of <sys/time.h> includes now unneeded. Add a special allocator for struct g_stat. This allocator will allocate entire pages and hand out g_stat functions from there. The "id" field indicates free/used status. Add "/dev/geom.stats" device driver whic exports the pages from the allocator to userland with mmap(2) in read-only mode. This mmap(2) interface should be considered a non-public interface and the functions in libgeom (not yet committed) should be used to access the statistics data.
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struct {
uint64_t nop;
Update the statistics collection code to track busy time instead of idle time. Statistics now default to "on" and can be turned off with sysctl kern.geom.collectstats=0 Performance impact of statistics collection is on the order of 800 nsec per consumer/provider set on a 700MHz Athlon.
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/* Number of requests completed */
Move the g_stat struct to its own .h file, we will export it to other code. Insted of embedding a struct g_stat in consumers and providers, merely include a pointer. Remove a couple of <sys/time.h> includes now unneeded. Add a special allocator for struct g_stat. This allocator will allocate entire pages and hand out g_stat functions from there. The "id" field indicates free/used status. Add "/dev/geom.stats" device driver whic exports the pages from the allocator to userland with mmap(2) in read-only mode. This mmap(2) interface should be considered a non-public interface and the functions in libgeom (not yet committed) should be used to access the statistics data.
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uint64_t nbyte;
Update the statistics collection code to track busy time instead of idle time. Statistics now default to "on" and can be turned off with sysctl kern.geom.collectstats=0 Performance impact of statistics collection is on the order of 800 nsec per consumer/provider set on a 700MHz Athlon.
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/* Number of bytes completed */
Move the g_stat struct to its own .h file, we will export it to other code. Insted of embedding a struct g_stat in consumers and providers, merely include a pointer. Remove a couple of <sys/time.h> includes now unneeded. Add a special allocator for struct g_stat. This allocator will allocate entire pages and hand out g_stat functions from there. The "id" field indicates free/used status. Add "/dev/geom.stats" device driver whic exports the pages from the allocator to userland with mmap(2) in read-only mode. This mmap(2) interface should be considered a non-public interface and the functions in libgeom (not yet committed) should be used to access the statistics data.
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uint64_t nmem;
Update the statistics collection code to track busy time instead of idle time. Statistics now default to "on" and can be turned off with sysctl kern.geom.collectstats=0 Performance impact of statistics collection is on the order of 800 nsec per consumer/provider set on a 700MHz Athlon.
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/* Number of ENOMEM request errors */
Move the g_stat struct to its own .h file, we will export it to other code. Insted of embedding a struct g_stat in consumers and providers, merely include a pointer. Remove a couple of <sys/time.h> includes now unneeded. Add a special allocator for struct g_stat. This allocator will allocate entire pages and hand out g_stat functions from there. The "id" field indicates free/used status. Add "/dev/geom.stats" device driver whic exports the pages from the allocator to userland with mmap(2) in read-only mode. This mmap(2) interface should be considered a non-public interface and the functions in libgeom (not yet committed) should be used to access the statistics data.
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uint64_t nerr;
Update the statistics collection code to track busy time instead of idle time. Statistics now default to "on" and can be turned off with sysctl kern.geom.collectstats=0 Performance impact of statistics collection is on the order of 800 nsec per consumer/provider set on a 700MHz Athlon.
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/* Number of other request errors */
Move the g_stat struct to its own .h file, we will export it to other code. Insted of embedding a struct g_stat in consumers and providers, merely include a pointer. Remove a couple of <sys/time.h> includes now unneeded. Add a special allocator for struct g_stat. This allocator will allocate entire pages and hand out g_stat functions from there. The "id" field indicates free/used status. Add "/dev/geom.stats" device driver whic exports the pages from the allocator to userland with mmap(2) in read-only mode. This mmap(2) interface should be considered a non-public interface and the functions in libgeom (not yet committed) should be used to access the statistics data.
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struct bintime dt;
Update the statistics collection code to track busy time instead of idle time. Statistics now default to "on" and can be turned off with sysctl kern.geom.collectstats=0 Performance impact of statistics collection is on the order of 800 nsec per consumer/provider set on a 700MHz Athlon.
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/* Accumulated request processing time */
Move the g_stat struct to its own .h file, we will export it to other code. Insted of embedding a struct g_stat in consumers and providers, merely include a pointer. Remove a couple of <sys/time.h> includes now unneeded. Add a special allocator for struct g_stat. This allocator will allocate entire pages and hand out g_stat functions from there. The "id" field indicates free/used status. Add "/dev/geom.stats" device driver whic exports the pages from the allocator to userland with mmap(2) in read-only mode. This mmap(2) interface should be considered a non-public interface and the functions in libgeom (not yet committed) should be used to access the statistics data.
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} ops[3];
Update the statistics collection code to track busy time instead of idle time. Statistics now default to "on" and can be turned off with sysctl kern.geom.collectstats=0 Performance impact of statistics collection is on the order of 800 nsec per consumer/provider set on a 700MHz Athlon.
2003-02-09 17:04:57 +00:00
Move the g_stat struct to its own .h file, we will export it to other code. Insted of embedding a struct g_stat in consumers and providers, merely include a pointer. Remove a couple of <sys/time.h> includes now unneeded. Add a special allocator for struct g_stat. This allocator will allocate entire pages and hand out g_stat functions from there. The "id" field indicates free/used status. Add "/dev/geom.stats" device driver whic exports the pages from the allocator to userland with mmap(2) in read-only mode. This mmap(2) interface should be considered a non-public interface and the functions in libgeom (not yet committed) should be used to access the statistics data.
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#define G_STAT_IDX_READ 0
#define G_STAT_IDX_WRITE 1
#define G_STAT_IDX_DELETE 2
Update the statistics collection code to track busy time instead of idle time. Statistics now default to "on" and can be turned off with sysctl kern.geom.collectstats=0 Performance impact of statistics collection is on the order of 800 nsec per consumer/provider set on a 700MHz Athlon.
2003-02-09 17:04:57 +00:00
Turn the "updating" flag (back) into two sequence number fields at either ends of the structure so we have a way to determine if a snapshot is consistent.
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int seq1;
/* See seq0 */
Move the g_stat struct to its own .h file, we will export it to other code. Insted of embedding a struct g_stat in consumers and providers, merely include a pointer. Remove a couple of <sys/time.h> includes now unneeded. Add a special allocator for struct g_stat. This allocator will allocate entire pages and hand out g_stat functions from there. The "id" field indicates free/used status. Add "/dev/geom.stats" device driver whic exports the pages from the allocator to userland with mmap(2) in read-only mode. This mmap(2) interface should be considered a non-public interface and the functions in libgeom (not yet committed) should be used to access the statistics data.
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};
#endif /* _GEOM_GEOM_STATS_H_ */
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