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authorGreg Banks <gnb@sgi.com>2009-01-13 21:26:36 +1100
committerJ. Bruce Fields <bfields@citi.umich.edu>2009-03-18 17:38:42 -0400
commit03cf6c9f49a8fea953d38648d016e3f46e814991 (patch)
treec7e639bd9fb775af1919d2442d0bf2306dfbfca7 /include/linux/sunrpc/svc.h
parent59a252ff8c0f2fa32c896f69d56ae33e641ce7ad (diff)
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knfsd: add file to export stats about nfsd pools
Add /proc/fs/nfsd/pool_stats to export to userspace various statistics about the operation of rpc server thread pools. This patch is based on a forward-ported version of knfsd-add-pool-thread-stats which has been shipping in the SGI "Enhanced NFS" product since 2006 and which was previously posted: http://article.gmane.org/gmane.linux.nfs/10375 It has also been updated thus: * moved EXPORT_SYMBOL() to near the function it exports * made the new struct struct seq_operations const * used SEQ_START_TOKEN instead of ((void *)1) * merged fix from SGI PV 990526 "sunrpc: use dprintk instead of printk in svc_pool_stats_*()" by Harshula Jayasuriya. * merged fix from SGI PV 964001 "Crash reading pool_stats before nfsds are started". Signed-off-by: Greg Banks <gnb@sgi.com> Signed-off-by: Harshula Jayasuriya <harshula@sgi.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Diffstat (limited to 'include/linux/sunrpc/svc.h')
-rw-r--r--include/linux/sunrpc/svc.h11
1 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/sunrpc/svc.h b/include/linux/sunrpc/svc.h
index 39ec186a492d..9f9f699dd469 100644
--- a/include/linux/sunrpc/svc.h
+++ b/include/linux/sunrpc/svc.h
@@ -24,6 +24,15 @@
*/
typedef int (*svc_thread_fn)(void *);
+/* statistics for svc_pool structures */
+struct svc_pool_stats {
+ unsigned long packets;
+ unsigned long sockets_queued;
+ unsigned long threads_woken;
+ unsigned long overloads_avoided;
+ unsigned long threads_timedout;
+};
+
/*
*
* RPC service thread pool.
@@ -42,6 +51,7 @@ struct svc_pool {
unsigned int sp_nrthreads; /* # of threads in pool */
struct list_head sp_all_threads; /* all server threads */
int sp_nwaking; /* number of threads woken but not yet active */
+ struct svc_pool_stats sp_stats; /* statistics on pool operation */
} ____cacheline_aligned_in_smp;
/*
@@ -396,6 +406,7 @@ struct svc_serv * svc_create_pooled(struct svc_program *, unsigned int,
sa_family_t, void (*shutdown)(struct svc_serv *),
svc_thread_fn, struct module *);
int svc_set_num_threads(struct svc_serv *, struct svc_pool *, int);
+int svc_pool_stats_open(struct svc_serv *serv, struct file *file);
void svc_destroy(struct svc_serv *);
int svc_process(struct svc_rqst *);
int svc_register(const struct svc_serv *, const unsigned short,