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authorSantosh Kumar Pradhan <spradhan@redhat.com>2014-01-14 11:21:44 +0530
committerAnand Avati <avati@redhat.com>2014-01-15 13:47:32 -0800
commit260e817b8a652ddb705808098da1e07e3660f4c7 (patch)
treef8ff148afd4833bc074240ba4c5f47e6961d04d9 /rpc
parentf3e227d525ee04a3ea0196f7a15aa9b1a8f8cae1 (diff)
gNFS: Set default outstanding RPC limit to 16
With 64, NFS server hangs with large I/O load (~ 64 threads writing to NFS server). The test results from Ben England (Performance expert) suggest to set it as 16 instead of 64. Change-Id: I418ff5ba0a3e9fdb14f395b8736438ee1bbd95f4 BUG: 1008301 Signed-off-by: Santosh Kumar Pradhan <spradhan@redhat.com> Reviewed-on: http://review.gluster.org/6696 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: ben england <bengland@redhat.com>
Diffstat (limited to 'rpc')
-rw-r--r--rpc/rpc-lib/src/rpcsvc.c46
-rw-r--r--rpc/rpc-lib/src/rpcsvc.h5
2 files changed, 28 insertions, 23 deletions
diff --git a/rpc/rpc-lib/src/rpcsvc.c b/rpc/rpc-lib/src/rpcsvc.c
index 69db8b7..96242df 100644
--- a/rpc/rpc-lib/src/rpcsvc.c
+++ b/rpc/rpc-lib/src/rpcsvc.c
@@ -1883,8 +1883,7 @@ rpcsvc_init_options (rpcsvc_t *svc, dict_t *options)
if (!svc->register_portmap)
gf_log (GF_RPCSVC, GF_LOG_DEBUG, "Portmap registration "
"disabled");
-
- ret = rpcsvc_set_outstanding_rpc_limit (svc, options);
+ ret = 0;
out:
return ret;
}
@@ -2016,10 +2015,15 @@ out:
}
/*
- * Reconfigure() the rpc.outstanding-rpc-limit param.
+ * Configure() the rpc.outstanding-rpc-limit param.
+ * If dict_get_int32() for dict-key "rpc.outstanding-rpc-limit" FAILS,
+ * it would set the value as "defvalue". Otherwise it would fetch the
+ * value and round up to multiple-of-8. defvalue must be +ve.
+ *
+ * NB: defval or set-value "0" is special which means unlimited/65536.
*/
int
-rpcsvc_set_outstanding_rpc_limit (rpcsvc_t *svc, dict_t *options)
+rpcsvc_set_outstanding_rpc_limit (rpcsvc_t *svc, dict_t *options, int defvalue)
{
int ret = -1; /* FAILURE */
int rpclim = 0;
@@ -2028,30 +2032,30 @@ rpcsvc_set_outstanding_rpc_limit (rpcsvc_t *svc, dict_t *options)
if ((!svc) || (!options))
return (-1);
- /* Reconfigure() the rpc.outstanding-rpc-limit param */
+ if ((defvalue < RPCSVC_MIN_OUTSTANDING_RPC_LIMIT) ||
+ (defvalue > RPCSVC_MAX_OUTSTANDING_RPC_LIMIT)) {
+ return (-1);
+ }
+
+ /* Fetch the rpc.outstanding-rpc-limit from dict. */
ret = dict_get_int32 (options, rpclimkey, &rpclim);
if (ret < 0) {
/* Fall back to default for FAILURE */
- rpclim = RPCSVC_DEFAULT_OUTSTANDING_RPC_LIMIT;
- } else {
- /* SUCCESS: round off to multiple of 8.
- * If the input value fails Boundary check, fall back to
- * default i.e. RPCSVC_DEFAULT_OUTSTANDING_RPC_LIMIT.
- * NB: value 0 is special, means its unset i.e. unlimited.
- */
- rpclim = ((rpclim + 8 - 1) >> 3) * 8;
- if (rpclim < RPCSVC_MIN_OUTSTANDING_RPC_LIMIT) {
- rpclim = RPCSVC_DEFAULT_OUTSTANDING_RPC_LIMIT;
- } else if (rpclim > RPCSVC_MAX_OUTSTANDING_RPC_LIMIT) {
- rpclim = RPCSVC_MAX_OUTSTANDING_RPC_LIMIT;
- }
+ rpclim = defvalue;
+ }
+
+ /* Round up to multiple-of-8. It must not exceed
+ * RPCSVC_MAX_OUTSTANDING_RPC_LIMIT.
+ */
+ rpclim = ((rpclim + 8 - 1) >> 3) * 8;
+ if (rpclim > RPCSVC_MAX_OUTSTANDING_RPC_LIMIT) {
+ rpclim = RPCSVC_MAX_OUTSTANDING_RPC_LIMIT;
}
if (svc->outstanding_rpc_limit != rpclim) {
svc->outstanding_rpc_limit = rpclim;
gf_log (GF_RPCSVC, GF_LOG_INFO,
- "Configured %s with value %d",
- rpclimkey, rpclim);
+ "Configured %s with value %d", rpclimkey, rpclim);
}
return (0);
@@ -2066,7 +2070,7 @@ rpcsvc_init (xlator_t *xl, glusterfs_ctx_t *ctx, dict_t *options,
rpcsvc_t *svc = NULL;
int ret = -1;
- if ((!ctx) || (!options))
+ if ((!xl) || (!ctx) || (!options))
return NULL;
svc = GF_CALLOC (1, sizeof (*svc), gf_common_mt_rpcsvc_t);
diff --git a/rpc/rpc-lib/src/rpcsvc.h b/rpc/rpc-lib/src/rpcsvc.h
index 30a969b..5a6f930 100644
--- a/rpc/rpc-lib/src/rpcsvc.h
+++ b/rpc/rpc-lib/src/rpcsvc.h
@@ -38,7 +38,8 @@
#define MAX_IOVEC 16
#endif
-#define RPCSVC_DEFAULT_OUTSTANDING_RPC_LIMIT 64
+#define RPCSVC_DEFAULT_OUTSTANDING_RPC_LIMIT 64 /* Default for protocol/server */
+#define RPCSVC_DEF_NFS_OUTSTANDING_RPC_LIMIT 16 /* Default for nfs/server */
#define RPCSVC_MAX_OUTSTANDING_RPC_LIMIT 65536
#define RPCSVC_MIN_OUTSTANDING_RPC_LIMIT 0 /* No limit i.e. Unlimited */
@@ -597,7 +598,7 @@ rpcsvc_set_addr_namelookup (rpcsvc_t *svc, dict_t *options);
int
rpcsvc_set_root_squash (rpcsvc_t *svc, dict_t *options);
int
-rpcsvc_set_outstanding_rpc_limit (rpcsvc_t *svc, dict_t *options);
+rpcsvc_set_outstanding_rpc_limit (rpcsvc_t *svc, dict_t *options, int defvalue);
int
rpcsvc_auth_array (rpcsvc_t *svc, char *volname, int *autharr, int arrlen);
rpcsvc_vector_sizer