linux/fs/nfsd/stats.c
Kefeng Wang 7d12cce878 fs: nfsd: use group allocation/free of per-cpu counters API
Use group allocation/free of per-cpu counters api to accelerate
nfsd percpu_counters init/destroy(), and also squash the
nfsd_percpu_counters_init/reset/destroy() and nfsd_counters_init/destroy()
into callers to simplify code.

Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2024-05-06 09:07:17 -04:00

87 lines
2.4 KiB
C

// SPDX-License-Identifier: GPL-2.0
/*
* procfs-based user access to knfsd statistics
*
* /proc/net/rpc/nfsd
*
* Format:
* rc <hits> <misses> <nocache>
* Statistsics for the reply cache
* fh <stale> <deprecated filehandle cache stats>
* statistics for filehandle lookup
* io <bytes-read> <bytes-written>
* statistics for IO throughput
* th <threads> <deprecated thread usage histogram stats>
* number of threads
* ra <deprecated ra-cache stats>
*
* plus generic RPC stats (see net/sunrpc/stats.c)
*
* Copyright (C) 1995, 1996, 1997 Olaf Kirch <okir@monad.swb.de>
*/
#include <linux/seq_file.h>
#include <linux/module.h>
#include <linux/sunrpc/stats.h>
#include <net/net_namespace.h>
#include "nfsd.h"
static int nfsd_show(struct seq_file *seq, void *v)
{
struct net *net = pde_data(file_inode(seq->file));
struct nfsd_net *nn = net_generic(net, nfsd_net_id);
int i;
seq_printf(seq, "rc %lld %lld %lld\nfh %lld 0 0 0 0\nio %lld %lld\n",
percpu_counter_sum_positive(&nn->counter[NFSD_STATS_RC_HITS]),
percpu_counter_sum_positive(&nn->counter[NFSD_STATS_RC_MISSES]),
percpu_counter_sum_positive(&nn->counter[NFSD_STATS_RC_NOCACHE]),
percpu_counter_sum_positive(&nn->counter[NFSD_STATS_FH_STALE]),
percpu_counter_sum_positive(&nn->counter[NFSD_STATS_IO_READ]),
percpu_counter_sum_positive(&nn->counter[NFSD_STATS_IO_WRITE]));
/* thread usage: */
seq_printf(seq, "th %u 0", atomic_read(&nfsd_th_cnt));
/* deprecated thread usage histogram stats */
for (i = 0; i < 10; i++)
seq_puts(seq, " 0.000");
/* deprecated ra-cache stats */
seq_puts(seq, "\nra 0 0 0 0 0 0 0 0 0 0 0 0\n");
/* show my rpc info */
svc_seq_show(seq, &nn->nfsd_svcstats);
#ifdef CONFIG_NFSD_V4
/* Show count for individual nfsv4 operations */
/* Writing operation numbers 0 1 2 also for maintaining uniformity */
seq_printf(seq, "proc4ops %u", LAST_NFS4_OP + 1);
for (i = 0; i <= LAST_NFS4_OP; i++) {
seq_printf(seq, " %lld",
percpu_counter_sum_positive(&nn->counter[NFSD_STATS_NFS4_OP(i)]));
}
seq_printf(seq, "\nwdeleg_getattr %lld",
percpu_counter_sum_positive(&nn->counter[NFSD_STATS_WDELEG_GETATTR]));
seq_putc(seq, '\n');
#endif
return 0;
}
DEFINE_PROC_SHOW_ATTRIBUTE(nfsd);
void nfsd_proc_stat_init(struct net *net)
{
struct nfsd_net *nn = net_generic(net, nfsd_net_id);
svc_proc_register(net, &nn->nfsd_svcstats, &nfsd_proc_ops);
}
void nfsd_proc_stat_shutdown(struct net *net)
{
svc_proc_unregister(net, "nfsd");
}