From: David Turner <dturner@twopensource.com>
To: git@vger.kernel.org, pclouds@gmail.com
Cc: David Turner <dturner@twopensource.com>
Subject: [PATCH 11/19] Add watchman support to reduce index refresh cost
Date: Wed, 9 Mar 2016 13:36:14 -0500 [thread overview]
Message-ID: <1457548582-28302-12-git-send-email-dturner@twopensource.com> (raw)
In-Reply-To: <1457548582-28302-1-git-send-email-dturner@twopensource.com>
From: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
The previous patch has the logic to clear bits in 'WAMA' bitmap. This
patch has logic to set bits as told by watchman. The missing bit,
_using_ these bits, are not here yet.
A lot of this code is written by David Turner originally, mostly from
[1]. I'm just copying and polishing it a bit.
[1] http://article.gmane.org/gmane.comp.version-control.git/248006
Signed-off-by: David Turner <dturner@twopensource.com>
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
Makefile | 7 ++++
cache.h | 1 +
config.c | 5 +++
configure.ac | 8 ++++
environment.c | 3 ++
watchman-support.c | 115 +++++++++++++++++++++++++++++++++++++++++++++++++++++
watchman-support.h | 7 ++++
7 files changed, 146 insertions(+)
create mode 100644 watchman-support.c
create mode 100644 watchman-support.h
diff --git a/Makefile b/Makefile
index a6c668b..e51331c 100644
--- a/Makefile
+++ b/Makefile
@@ -1416,6 +1416,12 @@ else
LIB_OBJS += thread-utils.o
endif
+ifdef USE_WATCHMAN
+ LIB_H += watchman-support.h
+ LIB_OBJS += watchman-support.o
+ BASIC_CFLAGS += -DUSE_WATCHMAN
+endif
+
ifdef HAVE_PATHS_H
BASIC_CFLAGS += -DHAVE_PATHS_H
endif
@@ -2164,6 +2170,7 @@ GIT-BUILD-OPTIONS: FORCE
@echo NO_PERL=\''$(subst ','\'',$(subst ','\'',$(NO_PERL)))'\' >>$@+
@echo NO_PYTHON=\''$(subst ','\'',$(subst ','\'',$(NO_PYTHON)))'\' >>$@+
@echo NO_UNIX_SOCKETS=\''$(subst ','\'',$(subst ','\'',$(NO_UNIX_SOCKETS)))'\' >>$@+
+ @echo USE_WATCHMAN=\''$(subst ','\'',$(subst ','\'',$(USE_WATCHMAN)))'\' >>$@+
ifdef TEST_OUTPUT_DIRECTORY
@echo TEST_OUTPUT_DIRECTORY=\''$(subst ','\'',$(subst ','\'',$(TEST_OUTPUT_DIRECTORY)))'\' >>$@+
endif
diff --git a/cache.h b/cache.h
index 8f7b4b1..bf20652 100644
--- a/cache.h
+++ b/cache.h
@@ -688,6 +688,7 @@ extern char *git_replace_ref_base;
extern int fsync_object_files;
extern int core_preload_index;
+extern int core_watchman_sync_timeout;
extern int core_apply_sparse_checkout;
extern int precomposed_unicode;
extern int protect_hfs;
diff --git a/config.c b/config.c
index 9ba40bc..e6dc141 100644
--- a/config.c
+++ b/config.c
@@ -882,6 +882,11 @@ static int git_default_core_config(const char *var, const char *value)
return 0;
}
+ if (!strcmp(var, "core.watchmansynctimeout")) {
+ core_watchman_sync_timeout = git_config_int(var, value);
+ return 0;
+ }
+
if (!strcmp(var, "core.createobject")) {
if (!strcmp(value, "rename"))
object_creation_mode = OBJECT_CREATION_USES_RENAMES;
diff --git a/configure.ac b/configure.ac
index 89e2590..6f10a15 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1092,6 +1092,14 @@ AC_COMPILE_IFELSE([BSD_SYSCTL_SRC],
HAVE_BSD_SYSCTL=])
GIT_CONF_SUBST([HAVE_BSD_SYSCTL])
+#
+# Check for watchman client library
+
+AC_CHECK_LIB([watchman], [watchman_connect],
+ [USE_WATCHMAN=YesPlease],
+ [USE_WATCHMAN=])
+GIT_CONF_SUBST([USE_WATCHMAN])
+
## Other checks.
# Define USE_PIC if you need the main git objects to be built with -fPIC
# in order to build and link perl/Git.so. x86-64 seems to need this.
diff --git a/environment.c b/environment.c
index 6dec9d0..35e03c7 100644
--- a/environment.c
+++ b/environment.c
@@ -94,6 +94,9 @@ int core_preload_index = 1;
*/
int ignore_untracked_cache_config;
+int core_watchman_sync_timeout = 300;
+
+
/* This is set by setup_git_dir_gently() and/or git_default_config() */
char *git_work_tree_cfg;
static char *work_tree;
diff --git a/watchman-support.c b/watchman-support.c
new file mode 100644
index 0000000..08e37ae
--- /dev/null
+++ b/watchman-support.c
@@ -0,0 +1,115 @@
+#include "cache.h"
+#include "watchman-support.h"
+#include "strbuf.h"
+#include <watchman.h>
+
+static struct watchman_query *make_query(const char *last_update)
+{
+ struct watchman_query *query = watchman_query();
+ watchman_query_set_fields(query, WATCHMAN_FIELD_NAME |
+ WATCHMAN_FIELD_EXISTS |
+ WATCHMAN_FIELD_NEWER);
+ watchman_query_set_empty_on_fresh(query, 1);
+ query->sync_timeout = core_watchman_sync_timeout;
+ if (*last_update)
+ watchman_query_set_since_oclock(query, last_update);
+ return query;
+}
+
+static struct watchman_query_result* query_watchman(
+ struct index_state *istate, struct watchman_connection *connection,
+ const char *fs_path, const char *last_update)
+{
+ struct watchman_error wm_error;
+ struct watchman_query *query;
+ struct watchman_expression *expr;
+ struct watchman_query_result *result;
+
+ query = make_query(last_update);
+ expr = watchman_true_expression();
+ result = watchman_do_query(connection, fs_path, query, expr, &wm_error);
+ watchman_free_query(query);
+ watchman_free_expression(expr);
+
+ if (!result)
+ warning("Watchman query error: %s (at %s)",
+ wm_error.message,
+ *last_update ? last_update : "the beginning");
+
+ return result;
+}
+
+static void update_index(struct index_state *istate,
+ struct watchman_query_result *result)
+{
+ int i;
+
+ if (result->is_fresh_instance) {
+ /* let refresh clear them later */
+ for (i = 0; i < istate->cache_nr; i++)
+ istate->cache[i]->ce_flags |= CE_WATCHMAN_DIRTY;
+ goto done;
+ }
+
+ for (i = 0; i < result->nr; i++) {
+ struct watchman_stat *wm = result->stats + i;
+ int pos;
+
+ if (!strncmp(wm->name, ".git/", 5) ||
+ strstr(wm->name, "/.git/"))
+ continue;
+
+ pos = index_name_pos(istate, wm->name, strlen(wm->name));
+ if (pos < 0)
+ continue;
+ /* FIXME: ignore staged entries and gitlinks too? */
+
+ istate->cache[pos]->ce_flags |= CE_WATCHMAN_DIRTY;
+ }
+
+done:
+ free(istate->last_update);
+ istate->last_update = xstrdup(result->clock);
+ istate->cache_changed |= WATCHMAN_CHANGED;
+}
+
+int check_watchman(struct index_state *istate)
+{
+ struct watchman_error wm_error;
+ struct watchman_connection *connection;
+ struct watchman_query_result *result;
+ const char *fs_path;
+ struct timeval timeout;
+ /*
+ * Convert core_watchman_sync_timeout, in milliseconds, to
+ * struct timeval, in seconds and microseconds.
+ */
+
+ fs_path = get_git_work_tree();
+ if (!fs_path)
+ return -1;
+
+ timeout.tv_sec = core_watchman_sync_timeout / 1000;
+ timeout.tv_usec = (core_watchman_sync_timeout % 1000) * 1000;
+ connection = watchman_connect(timeout, &wm_error);
+
+ if (!connection) {
+ warning("Watchman watch error: %s", wm_error.message);
+ return -1;
+ }
+
+ if (watchman_watch(connection, fs_path, &wm_error)) {
+ warning("Watchman watch error: %s", wm_error.message);
+ watchman_connection_close(connection);
+ return -1;
+ }
+
+
+ result = query_watchman(istate, connection, fs_path, istate->last_update);
+ watchman_connection_close(connection);
+ if (!result)
+ return -1;
+ update_index(istate, result);
+ watchman_free_query_result(result);
+ return 0;
+}
diff --git a/watchman-support.h b/watchman-support.h
new file mode 100644
index 0000000..ee1ef2c
--- /dev/null
+++ b/watchman-support.h
@@ -0,0 +1,7 @@
+#ifndef WATCHMAN_SUPPORT_H
+#define WATCHMAN_SUPPORT_H
+
+struct index_state;
+int check_watchman(struct index_state *index);
+
+#endif /* WATCHMAN_SUPPORT_H */
--
2.4.2.767.g62658d5-twtrsrc
next prev parent reply other threads:[~2016-03-09 18:37 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-09 18:36 [PATCH 00/19] index-helper, watchman David Turner
2016-03-09 18:36 ` [PATCH 01/19] trace.c: add GIT_TRACE_PACK_STATS for pack usage statistics David Turner
2016-03-09 22:58 ` Junio C Hamano
2016-03-10 0:05 ` David Turner
2016-03-10 10:59 ` Duy Nguyen
2016-03-09 18:36 ` [PATCH 02/19] read-cache.c: fix constness of verify_hdr() David Turner
2016-03-09 18:36 ` [PATCH 03/19] read-cache: allow to keep mmap'd memory after reading David Turner
2016-03-09 23:02 ` Junio C Hamano
2016-03-10 0:09 ` David Turner
2016-03-09 18:36 ` [PATCH 04/19] index-helper: new daemon for caching index and related stuff David Turner
2016-03-09 23:09 ` Junio C Hamano
2016-03-09 23:21 ` Junio C Hamano
2016-03-10 0:01 ` David Turner
2016-03-10 11:17 ` Duy Nguyen
2016-03-10 20:22 ` David Turner
2016-03-11 1:11 ` Duy Nguyen
2016-03-10 0:18 ` David Turner
2016-03-15 11:56 ` Duy Nguyen
2016-03-15 15:56 ` Junio C Hamano
2016-03-15 11:52 ` Duy Nguyen
2016-03-09 18:36 ` [PATCH 05/19] trace.c: add GIT_TRACE_INDEX_STATS for index statistics David Turner
2016-03-09 18:36 ` [PATCH 06/19] index-helper: add --strict David Turner
2016-03-09 18:36 ` [PATCH 07/19] daemonize(): set a flag before exiting the main process David Turner
2016-03-09 18:36 ` [PATCH 08/19] index-helper: add --detach David Turner
2016-03-09 18:36 ` [PATCH 09/19] index-helper: add Windows support David Turner
2016-03-16 11:42 ` Duy Nguyen
2016-03-17 12:18 ` Johannes Schindelin
2016-03-17 12:59 ` Duy Nguyen
2016-03-09 18:36 ` [PATCH 10/19] read-cache: add watchman 'WAMA' extension David Turner
2016-03-09 18:36 ` David Turner [this message]
2016-03-09 18:36 ` [PATCH 12/19] read-cache: allow index-helper to prepare shm before git reads it David Turner
2016-03-09 18:36 ` [PATCH 13/19] index-helper: use watchman to avoid refreshing index with lstat() David Turner
2016-03-09 18:36 ` [PATCH 14/19] update-index: enable/disable watchman support David Turner
2016-03-09 18:36 ` [PATCH 15/19] unpack-trees: preserve index extensions David Turner
2016-03-09 18:36 ` [PATCH 16/19] index-helper: rewrite pidfile after daemonizing David Turner
2016-03-09 18:36 ` [PATCH 17/19] index-helper: process management David Turner
2016-03-09 18:36 ` [PATCH 18/19] index-helper: autorun David Turner
2016-03-15 12:12 ` Duy Nguyen
2016-03-15 14:26 ` Johannes Schindelin
2016-03-16 11:37 ` Duy Nguyen
2016-03-16 18:11 ` David Turner
2016-03-16 18:27 ` Johannes Schindelin
2016-03-17 13:02 ` Duy Nguyen
2016-03-17 14:43 ` Johannes Schindelin
2016-03-17 18:31 ` David Turner
2016-03-18 0:50 ` Duy Nguyen
2016-03-18 7:14 ` Johannes Schindelin
2016-03-18 7:44 ` Duy Nguyen
2016-03-18 17:22 ` David Turner
2016-03-18 23:09 ` Duy Nguyen
2016-03-18 7:17 ` Johannes Schindelin
2016-03-18 7:34 ` Duy Nguyen
2016-03-18 15:57 ` Johannes Schindelin
2016-03-09 18:36 ` [PATCH 19/19] hack: watchman/untracked cache mashup David Turner
2016-03-15 12:31 ` Duy Nguyen
2016-03-17 0:56 ` David Turner
2016-03-17 13:06 ` Duy Nguyen
2016-03-17 18:08 ` David Turner
2016-03-29 17:09 ` [PATCH 00/19] index-helper, watchman Torsten Bögershausen
2016-03-29 21:51 ` David Turner
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