freebsd-dev/usr.bin/netstat/mbuf.c
Gleb Smirnoff 5dba303d01 Use bogus_page to properly reduce number of I/Os in sendfile(2). The new
sendfile_swapin() loop works this way:

- Find first invalid page in the request.
- Do vm_pager_has_page() and get count of pages, that can be taken in
  single I/O.
- Trim valid pages from the end of the request.
- Cycle through the request and substitute to bogus_page all valid
  pages that are in the middle of the request.
- After I/O launched (pager copies array of pages into buf(9), it
  is important to restore proper page pointers with help vm_page_lookup().

Count bogus pages used and report them in sendfile stats.
2016-11-17 21:02:55 +00:00

363 lines
13 KiB
C

/*-
* Copyright (c) 1983, 1988, 1993
* The Regents of the University of California.
* Copyright (c) 2005 Robert N. M. Watson
* All rights reserved.
*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*/
#if 0
#ifndef lint
static char sccsid[] = "@(#)mbuf.c 8.1 (Berkeley) 6/6/93";
#endif /* not lint */
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/mbuf.h>
#include <sys/protosw.h>
#include <sys/sf_buf.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/sysctl.h>
#include <err.h>
#include <kvm.h>
#include <memstat.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <string.h>
#include <libxo/xo.h>
#include "netstat.h"
/*
* Print mbuf statistics.
*/
void
mbpr(void *kvmd, u_long mbaddr)
{
struct memory_type_list *mtlp;
struct memory_type *mtp;
uintmax_t mbuf_count, mbuf_bytes, mbuf_free, mbuf_failures, mbuf_size;
uintmax_t mbuf_sleeps;
uintmax_t cluster_count, cluster_limit, cluster_free;
uintmax_t cluster_failures, cluster_size, cluster_sleeps;
uintmax_t packet_count, packet_bytes, packet_free, packet_failures;
uintmax_t packet_sleeps;
uintmax_t tag_bytes;
uintmax_t jumbop_count, jumbop_limit, jumbop_free;
uintmax_t jumbop_failures, jumbop_sleeps, jumbop_size;
uintmax_t jumbo9_count, jumbo9_limit, jumbo9_free;
uintmax_t jumbo9_failures, jumbo9_sleeps, jumbo9_size;
uintmax_t jumbo16_count, jumbo16_limit, jumbo16_free;
uintmax_t jumbo16_failures, jumbo16_sleeps, jumbo16_size;
uintmax_t bytes_inuse, bytes_incache, bytes_total;
int nsfbufs, nsfbufspeak, nsfbufsused;
struct sfstat sfstat;
size_t mlen;
int error;
mtlp = memstat_mtl_alloc();
if (mtlp == NULL) {
xo_warn("memstat_mtl_alloc");
return;
}
/*
* Use memstat_*_all() because some mbuf-related memory is in uma(9),
* and some malloc(9).
*/
if (live) {
if (memstat_sysctl_all(mtlp, 0) < 0) {
xo_warnx("memstat_sysctl_all: %s",
memstat_strerror(memstat_mtl_geterror(mtlp)));
goto out;
}
} else {
if (memstat_kvm_all(mtlp, kvmd) < 0) {
error = memstat_mtl_geterror(mtlp);
if (error == MEMSTAT_ERROR_KVM)
xo_warnx("memstat_kvm_all: %s",
kvm_geterr(kvmd));
else
xo_warnx("memstat_kvm_all: %s",
memstat_strerror(error));
goto out;
}
}
mtp = memstat_mtl_find(mtlp, ALLOCATOR_UMA, MBUF_MEM_NAME);
if (mtp == NULL) {
xo_warnx("memstat_mtl_find: zone %s not found", MBUF_MEM_NAME);
goto out;
}
mbuf_count = memstat_get_count(mtp);
mbuf_bytes = memstat_get_bytes(mtp);
mbuf_free = memstat_get_free(mtp);
mbuf_failures = memstat_get_failures(mtp);
mbuf_sleeps = memstat_get_sleeps(mtp);
mbuf_size = memstat_get_size(mtp);
mtp = memstat_mtl_find(mtlp, ALLOCATOR_UMA, MBUF_PACKET_MEM_NAME);
if (mtp == NULL) {
xo_warnx("memstat_mtl_find: zone %s not found",
MBUF_PACKET_MEM_NAME);
goto out;
}
packet_count = memstat_get_count(mtp);
packet_bytes = memstat_get_bytes(mtp);
packet_free = memstat_get_free(mtp);
packet_sleeps = memstat_get_sleeps(mtp);
packet_failures = memstat_get_failures(mtp);
mtp = memstat_mtl_find(mtlp, ALLOCATOR_UMA, MBUF_CLUSTER_MEM_NAME);
if (mtp == NULL) {
xo_warnx("memstat_mtl_find: zone %s not found",
MBUF_CLUSTER_MEM_NAME);
goto out;
}
cluster_count = memstat_get_count(mtp);
cluster_limit = memstat_get_countlimit(mtp);
cluster_free = memstat_get_free(mtp);
cluster_failures = memstat_get_failures(mtp);
cluster_sleeps = memstat_get_sleeps(mtp);
cluster_size = memstat_get_size(mtp);
mtp = memstat_mtl_find(mtlp, ALLOCATOR_MALLOC, MBUF_TAG_MEM_NAME);
if (mtp == NULL) {
xo_warnx("memstat_mtl_find: malloc type %s not found",
MBUF_TAG_MEM_NAME);
goto out;
}
tag_bytes = memstat_get_bytes(mtp);
mtp = memstat_mtl_find(mtlp, ALLOCATOR_UMA, MBUF_JUMBOP_MEM_NAME);
if (mtp == NULL) {
xo_warnx("memstat_mtl_find: zone %s not found",
MBUF_JUMBOP_MEM_NAME);
goto out;
}
jumbop_count = memstat_get_count(mtp);
jumbop_limit = memstat_get_countlimit(mtp);
jumbop_free = memstat_get_free(mtp);
jumbop_failures = memstat_get_failures(mtp);
jumbop_sleeps = memstat_get_sleeps(mtp);
jumbop_size = memstat_get_size(mtp);
mtp = memstat_mtl_find(mtlp, ALLOCATOR_UMA, MBUF_JUMBO9_MEM_NAME);
if (mtp == NULL) {
xo_warnx("memstat_mtl_find: zone %s not found",
MBUF_JUMBO9_MEM_NAME);
goto out;
}
jumbo9_count = memstat_get_count(mtp);
jumbo9_limit = memstat_get_countlimit(mtp);
jumbo9_free = memstat_get_free(mtp);
jumbo9_failures = memstat_get_failures(mtp);
jumbo9_sleeps = memstat_get_sleeps(mtp);
jumbo9_size = memstat_get_size(mtp);
mtp = memstat_mtl_find(mtlp, ALLOCATOR_UMA, MBUF_JUMBO16_MEM_NAME);
if (mtp == NULL) {
xo_warnx("memstat_mtl_find: zone %s not found",
MBUF_JUMBO16_MEM_NAME);
goto out;
}
jumbo16_count = memstat_get_count(mtp);
jumbo16_limit = memstat_get_countlimit(mtp);
jumbo16_free = memstat_get_free(mtp);
jumbo16_failures = memstat_get_failures(mtp);
jumbo16_sleeps = memstat_get_sleeps(mtp);
jumbo16_size = memstat_get_size(mtp);
xo_open_container("mbuf-statistics");
xo_emit("{:mbuf-current/%ju}/{:mbuf-cache/%ju}/{:mbuf-total/%ju} "
"{N:mbufs in use (current\\/cache\\/total)}\n",
mbuf_count + packet_count, mbuf_free + packet_free,
mbuf_count + packet_count + mbuf_free + packet_free);
xo_emit("{:cluster-current/%ju}/{:cluster-cache/%ju}/"
"{:cluster-total/%ju}/{:cluster-max/%ju} "
"{N:mbuf clusters in use (current\\/cache\\/total\\/max)}\n",
cluster_count - packet_free, cluster_free + packet_free,
cluster_count + cluster_free, cluster_limit);
xo_emit("{:packet-count/%ju}/{:packet-free/%ju} "
"{N:mbuf+clusters out of packet secondary zone in use "
"(current\\/cache)}\n",
packet_count, packet_free);
xo_emit("{:jumbo-count/%ju}/{:jumbo-cache/%ju}/{:jumbo-total/%ju}/"
"{:jumbo-max/%ju} {:jumbo-page-size/%ju}{U:k} {N:(page size)} "
"{N:jumbo clusters in use (current\\/cache\\/total\\/max)}\n",
jumbop_count, jumbop_free, jumbop_count + jumbop_free,
jumbop_limit, jumbop_size / 1024);
xo_emit("{:jumbo9-count/%ju}/{:jumbo9-cache/%ju}/"
"{:jumbo9-total/%ju}/{:jumbo9-max/%ju} "
"{N:9k jumbo clusters in use (current\\/cache\\/total\\/max)}\n",
jumbo9_count, jumbo9_free, jumbo9_count + jumbo9_free,
jumbo9_limit);
xo_emit("{:jumbo16-count/%ju}/{:jumbo16-cache/%ju}/"
"{:jumbo16-total/%ju}/{:jumbo16-limit/%ju} "
"{N:16k jumbo clusters in use (current\\/cache\\/total\\/max)}\n",
jumbo16_count, jumbo16_free, jumbo16_count + jumbo16_free,
jumbo16_limit);
#if 0
xo_emit("{:tag-count/%ju} {N:mbuf tags in use}\n", tag_count);
#endif
/*-
* Calculate in-use bytes as:
* - straight mbuf memory
* - mbuf memory in packets
* - the clusters attached to packets
* - and the rest of the non-packet-attached clusters.
* - m_tag memory
* This avoids counting the clusters attached to packets in the cache.
* This currently excludes sf_buf space.
*/
bytes_inuse =
mbuf_bytes + /* straight mbuf memory */
packet_bytes + /* mbufs in packets */
(packet_count * cluster_size) + /* clusters in packets */
/* other clusters */
((cluster_count - packet_count - packet_free) * cluster_size) +
tag_bytes +
(jumbop_count * jumbop_size) + /* jumbo clusters */
(jumbo9_count * jumbo9_size) +
(jumbo16_count * jumbo16_size);
/*
* Calculate in-cache bytes as:
* - cached straught mbufs
* - cached packet mbufs
* - cached packet clusters
* - cached straight clusters
* This currently excludes sf_buf space.
*/
bytes_incache =
(mbuf_free * mbuf_size) + /* straight free mbufs */
(packet_free * mbuf_size) + /* mbufs in free packets */
(packet_free * cluster_size) + /* clusters in free packets */
(cluster_free * cluster_size) + /* free clusters */
(jumbop_free * jumbop_size) + /* jumbo clusters */
(jumbo9_free * jumbo9_size) +
(jumbo16_free * jumbo16_size);
/*
* Total is bytes in use + bytes in cache. This doesn't take into
* account various other misc data structures, overhead, etc, but
* gives the user something useful despite that.
*/
bytes_total = bytes_inuse + bytes_incache;
xo_emit("{:bytes-in-use/%ju}{U:K}/{:bytes-in-cache/%ju}{U:K}/"
"{:bytes-total/%ju}{U:K} "
"{N:bytes allocated to network (current\\/cache\\/total)}\n",
bytes_inuse / 1024, bytes_incache / 1024, bytes_total / 1024);
xo_emit("{:mbuf-failures/%ju}/{:cluster-failures/%ju}/"
"{:packet-failures/%ju} {N:requests for mbufs denied "
"(mbufs\\/clusters\\/mbuf+clusters)}\n",
mbuf_failures, cluster_failures, packet_failures);
xo_emit("{:mbuf-sleeps/%ju}/{:cluster-sleeps/%ju}/{:packet-sleeps/%ju} "
"{N:requests for mbufs delayed "
"(mbufs\\/clusters\\/mbuf+clusters)}\n",
mbuf_sleeps, cluster_sleeps, packet_sleeps);
xo_emit("{:jumbop-sleeps/%ju}/{:jumbo9-sleeps/%ju}/"
"{:jumbo16-sleeps/%ju} {N:/requests for jumbo clusters delayed "
"(%juk\\/9k\\/16k)}\n",
jumbop_sleeps, jumbo9_sleeps, jumbo16_sleeps, jumbop_size / 1024);
xo_emit("{:jumbop-failures/%ju}/{:jumbo9-failures/%ju}/"
"{:jumbo16-failures/%ju} {N:/requests for jumbo clusters denied "
"(%juk\\/9k\\/16k)}\n",
jumbop_failures, jumbo9_failures, jumbo16_failures,
jumbop_size / 1024);
mlen = sizeof(nsfbufs);
if (live &&
sysctlbyname("kern.ipc.nsfbufs", &nsfbufs, &mlen, NULL, 0) == 0 &&
sysctlbyname("kern.ipc.nsfbufsused", &nsfbufsused, &mlen,
NULL, 0) == 0 &&
sysctlbyname("kern.ipc.nsfbufspeak", &nsfbufspeak, &mlen,
NULL, 0) == 0)
xo_emit("{:nsfbufs-current/%d}/{:nsfbufs-peak/%d}/"
"{:nsfbufs/%d} "
"{N:sfbufs in use (current\\/peak\\/max)}\n",
nsfbufsused, nsfbufspeak, nsfbufs);
if (fetch_stats("kern.ipc.sfstat", mbaddr, &sfstat, sizeof(sfstat),
kread_counters) != 0)
goto out;
xo_emit("{:sendfile-syscalls/%ju} {N:sendfile syscalls}\n",
(uintmax_t)sfstat.sf_syscalls);
xo_emit("{:sendfile-no-io/%ju} "
"{N:sendfile syscalls completed without I\\/O request}\n",
(uintmax_t)sfstat.sf_noiocnt);
xo_emit("{:sendfile-io-count/%ju} "
"{N:requests for I\\/O initiated by sendfile}\n",
(uintmax_t)sfstat.sf_iocnt);
xo_emit("{:sendfile-pages-sent/%ju} "
"{N:pages read by sendfile as part of a request}\n",
(uintmax_t)sfstat.sf_pages_read);
xo_emit("{:sendfile-pages-valid/%ju} "
"{N:pages were valid at time of a sendfile request}\n",
(uintmax_t)sfstat.sf_pages_valid);
xo_emit("{:sendfile-pages-bogus/%ju} "
"{N:pages were valid and substituted to bogus page}\n",
(uintmax_t)sfstat.sf_pages_bogus);
xo_emit("{:sendfile-requested-readahead/%ju} "
"{N:pages were requested for read ahead by applications}\n",
(uintmax_t)sfstat.sf_rhpages_requested);
xo_emit("{:sendfile-readahead/%ju} "
"{N:pages were read ahead by sendfile}\n",
(uintmax_t)sfstat.sf_rhpages_read);
xo_emit("{:sendfile-busy-encounters/%ju} "
"{N:times sendfile encountered an already busy page}\n",
(uintmax_t)sfstat.sf_busy);
xo_emit("{:sfbufs-alloc-failed/%ju} {N:requests for sfbufs denied}\n",
(uintmax_t)sfstat.sf_allocfail);
xo_emit("{:sfbufs-alloc-wait/%ju} {N:requests for sfbufs delayed}\n",
(uintmax_t)sfstat.sf_allocwait);
out:
xo_close_container("mbuf-statistics");
memstat_mtl_free(mtlp);
}