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authorNiels de Vos <ndevos@redhat.com>2017-04-17 15:50:07 +0530
committerKaleb KEITHLEY <kkeithle@redhat.com>2017-05-01 09:30:14 +0000
commit73fcf3a874b2049da31d01b8363d1ac85c9488c2 (patch)
treeb9db965e337fde22a7668cb11ffb0351619a924f /libglusterfs/src
parent859669759f7fa0f2114add13660ce3bf16c77f30 (diff)
core: make the per glusterfs_ctx_t timer-wheel refcounted
xlators can use a 'global' timer-wheel for scheduling events. This timer-wheel is managed per glusterfs_ctx_t, but does not need to be allocated for every graph. When an xlator wants to use the timer-wheel, it will be instanciated on demand, and provided to xlators that request it later on. By adding a reference counter to the glusterfs_ctx_t for the timer-wheel, the threads and structures can be cleaned up when the last xlator does not have a need for it anymore. In general, the xlators request the timer-wheel in init(), and they should return it in fini(). Because the timer-wheel is managed per glusterfs_ctx_t, the functions can be added to ctx.c and do not need to live in their very minimal tw.[ch] files. Change-Id: I19d225b39aaa272d9005ba7adc3104c3764f1572 BUG: 1442788 Reported-by: Poornima G <pgurusid@redhat.com> Signed-off-by: Niels de Vos <ndevos@redhat.com> Reviewed-on: https://review.gluster.org/17068 NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org> CentOS-regression: Gluster Build System <jenkins@build.gluster.org> Smoke: Gluster Build System <jenkins@build.gluster.org> Reviewed-by: Amar Tumballi <amarts@redhat.com> Reviewed-by: Zhou Zhengping <johnzzpcrystal@gmail.com> Reviewed-by: Kaleb KEITHLEY <kkeithle@redhat.com>
Diffstat (limited to 'libglusterfs/src')
-rw-r--r--libglusterfs/src/Makefile.am4
-rw-r--r--libglusterfs/src/ctx.c39
-rw-r--r--libglusterfs/src/globals.h3
-rw-r--r--libglusterfs/src/glusterfs.h18
-rw-r--r--libglusterfs/src/mem-types.h1
-rw-r--r--libglusterfs/src/tw.c25
-rw-r--r--libglusterfs/src/tw.h23
7 files changed, 56 insertions, 57 deletions
diff --git a/libglusterfs/src/Makefile.am b/libglusterfs/src/Makefile.am
index 2311c53645a..52b73166ddb 100644
--- a/libglusterfs/src/Makefile.am
+++ b/libglusterfs/src/Makefile.am
@@ -32,7 +32,7 @@ libglusterfs_la_SOURCES = dict.c xlator.c logging.c \
strfd.c parse-utils.c $(CONTRIBDIR)/mount/mntent.c \
$(CONTRIBDIR)/libexecinfo/execinfo.c quota-common-utils.c rot-buffs.c \
$(CONTRIBDIR)/timer-wheel/timer-wheel.c \
- $(CONTRIBDIR)/timer-wheel/find_last_bit.c tw.c default-args.c locking.c \
+ $(CONTRIBDIR)/timer-wheel/find_last_bit.c default-args.c locking.c \
compound-fop-utils.c throttle-tbf.c
nodist_libglusterfs_la_SOURCES = y.tab.c graph.lex.c defaults.c
@@ -50,7 +50,7 @@ libglusterfs_la_HEADERS = common-utils.h defaults.h default-args.h \
refcount.h run.h options.h lkowner.h fd-lk.h circ-buff.h \
event-history.h gidcache.h client_t.h glusterfs-acl.h \
glfs-message-id.h template-component-messages.h strfd.h \
- syncop-utils.h parse-utils.h libglusterfs-messages.h tw.h \
+ syncop-utils.h parse-utils.h libglusterfs-messages.h \
lvm-defaults.h quota-common-utils.h rot-buffs.h \
compat-uuid.h upcall-utils.h throttle-tbf.h events.h\
compound-fop-utils.h atomic.h
diff --git a/libglusterfs/src/ctx.c b/libglusterfs/src/ctx.c
index d3fb39822d1..1c707eb5dfd 100644
--- a/libglusterfs/src/ctx.c
+++ b/libglusterfs/src/ctx.c
@@ -9,9 +9,10 @@
*/
#include <pthread.h>
-#include "globals.h"
+#include "globals.h"
#include "glusterfs.h"
+#include "timer-wheel.h"
glusterfs_ctx_t *
glusterfs_ctx_new ()
@@ -52,3 +53,39 @@ out:
return ctx;
}
+static void
+glusterfs_ctx_tw_destroy (struct gf_ctx_tw *ctx_tw)
+{
+ if (ctx_tw->timer_wheel)
+ gf_tw_cleanup_timers (ctx_tw->timer_wheel);
+
+ GF_FREE (ctx_tw);
+}
+
+struct tvec_base*
+glusterfs_ctx_tw_get (glusterfs_ctx_t *ctx)
+{
+ struct gf_ctx_tw *ctx_tw = NULL;
+
+ LOCK (&ctx->lock);
+ {
+ if (ctx->tw) {
+ ctx_tw = GF_REF_GET (ctx->tw);
+ } else {
+ ctx_tw = GF_CALLOC (1, sizeof (struct gf_ctx_tw),
+ gf_common_mt_tw_ctx);
+ ctx_tw->timer_wheel = gf_tw_init_timers();
+ GF_REF_INIT (ctx_tw, glusterfs_ctx_tw_destroy);
+ ctx->tw = ctx_tw;
+ }
+ }
+ UNLOCK (&ctx->lock);
+
+ return ctx_tw->timer_wheel;
+}
+
+void
+glusterfs_ctx_tw_put (glusterfs_ctx_t *ctx)
+{
+ GF_REF_PUT (ctx->tw);
+}
diff --git a/libglusterfs/src/globals.h b/libglusterfs/src/globals.h
index 5f4a938a08f..4c668dcb19c 100644
--- a/libglusterfs/src/globals.h
+++ b/libglusterfs/src/globals.h
@@ -116,6 +116,9 @@ char *glusterfs_leaseid_buf_get (void);
/* init */
int glusterfs_globals_init (glusterfs_ctx_t *ctx);
+struct tvec_base* glusterfs_ctx_tw_get (glusterfs_ctx_t *ctx);
+void glusterfs_ctx_tw_put (glusterfs_ctx_t *ctx);
+
extern const char *gf_fop_list[];
extern const char *gf_upcall_list[];
diff --git a/libglusterfs/src/glusterfs.h b/libglusterfs/src/glusterfs.h
index 4d5ca839cd3..839a1d47d2a 100644
--- a/libglusterfs/src/glusterfs.h
+++ b/libglusterfs/src/glusterfs.h
@@ -36,6 +36,7 @@
#include "logging.h"
#include "lkowner.h"
#include "compat-uuid.h"
+#include "refcount.h"
#define GF_YES 1
#define GF_NO 0
@@ -438,6 +439,12 @@ typedef enum {
struct tvec_base;
+/* reference counting for the global (per ctx) timer-wheel */
+struct gf_ctx_tw {
+ GF_REF_DECL;
+ struct tvec_base *timer_wheel; /* global timer-wheel instance */
+};
+
struct _glusterfs_ctx {
cmd_args_t cmd_args;
char *process_uuid;
@@ -506,14 +513,13 @@ struct _glusterfs_ctx {
*/
mgmt_ssl_t secure_srvr;
/* Buffer to 'save' backtrace even under OOM-kill like situations*/
- char btbuf[GF_BACKTRACE_LEN];
+ char btbuf[GF_BACKTRACE_LEN];
- pthread_mutex_t notify_lock;
- pthread_cond_t notify_cond;
- int notifying;
-
- struct tvec_base *timer_wheel; /* global timer-wheel instance */
+ pthread_mutex_t notify_lock;
+ pthread_cond_t notify_cond;
+ int notifying;
+ struct gf_ctx_tw *tw; /* refcounted timer_wheel */
};
typedef struct _glusterfs_ctx glusterfs_ctx_t;
diff --git a/libglusterfs/src/mem-types.h b/libglusterfs/src/mem-types.h
index 6c0472f00b8..59c7e77d548 100644
--- a/libglusterfs/src/mem-types.h
+++ b/libglusterfs/src/mem-types.h
@@ -164,6 +164,7 @@ enum gf_common_mem_types_ {
/*used for compound fops*/
gf_mt_compound_req_t,
gf_mt_compound_rsp_t,
+ gf_common_mt_tw_ctx,
gf_common_mt_tw_timer_list,
/*lock migration*/
gf_common_mt_lock_mig,
diff --git a/libglusterfs/src/tw.c b/libglusterfs/src/tw.c
deleted file mode 100644
index fa11998aace..00000000000
--- a/libglusterfs/src/tw.c
+++ /dev/null
@@ -1,25 +0,0 @@
-/*
- Copyright (c) 2008-2015 Red Hat, Inc. <http://www.redhat.com>
- This file is part of GlusterFS.
-
- This file is licensed to you under your choice of the GNU Lesser
- General Public License, version 3 or any later version (LGPLv3 or
- later), or the GNU General Public License, version 2 (GPLv2), in all
- cases as published by the Free Software Foundation.
-*/
-
-#include "tw.h"
-#include "timer-wheel.h"
-
-int
-glusterfs_global_timer_wheel_init (glusterfs_ctx_t *ctx)
-{
- ctx->timer_wheel = gf_tw_init_timers();
- return ctx->timer_wheel ? 0 : -1;
-}
-
-struct tvec_base *
-glusterfs_global_timer_wheel (xlator_t *this)
-{
- return this->ctx->timer_wheel;
-}
diff --git a/libglusterfs/src/tw.h b/libglusterfs/src/tw.h
deleted file mode 100644
index e635cd2b496..00000000000
--- a/libglusterfs/src/tw.h
+++ /dev/null
@@ -1,23 +0,0 @@
-/*
- Copyright (c) 2008-2015 Red Hat, Inc. <http://www.redhat.com>
- This file is part of GlusterFS.
-
- This file is licensed to you under your choice of the GNU Lesser
- General Public License, version 3 or any later version (LGPLv3 or
- later), or the GNU General Public License, version 2 (GPLv2), in all
- cases as published by the Free Software Foundation.
-*/
-
-#ifndef __TW_H__
-#define __TW_H__
-
-#include "xlator.h"
-#include "glusterfs.h"
-
-int
-glusterfs_global_timer_wheel_init (glusterfs_ctx_t *);
-
-struct tvec_base *
-glusterfs_global_timer_wheel (xlator_t *);
-
-#endif /* __TW_H__ */