stat: add mem stat for jemalloc (#1218)

1, add opts arg for mallctl,dumpinfo
2, collect jemalloc.mem info
3, add debug_console cmd: jmem

Co-authored-by: fx <fx@f.x>

Author: fanlix

lualib-src/lua-memory.c

@@ -23,11 +23,42 @@ lblock(lua_State *L) {
 
 static int
 ldumpinfo(lua_State *L) {
-	memory_info_dump();
+	const char *opts = NULL;
+	if (lua_isstring(L, 1)) {
+		opts = luaL_checkstring(L,1);
+	}
+	memory_info_dump(opts);
 
 	return 0;
 }
 
+static int
+ljestat(lua_State *L) {
+	static const char* names[] = {
+		"stats.allocated",
+		"stats.resident",
+		"stats.retained",
+		"stats.mapped",
+		"stats.active" };
+	static size_t flush = 1;
+	mallctl_int64("epoch", &flush); // refresh je.stats.cache
+	lua_newtable(L);
+	int i;
+	for (i = 0; i < (sizeof(names)/sizeof(names[0])); i++) {
+		lua_pushstring(L, names[i]);
+		lua_pushinteger(L,  (lua_Integer) mallctl_int64(names[i], NULL));
+		lua_settable(L, -3);
+	}
+	return 1;
+}
+
+static int
+lmallctl(lua_State *L) {
+	const char *name = luaL_checkstring(L,1);
+	lua_pushinteger(L, (lua_Integer) mallctl_int64(name, NULL));
+	return 1;
+}
+
 static int
 ldump(lua_State *L) {
 	dump_c_mem();
@@ -69,6 +100,8 @@ luaopen_skynet_memory(lua_State *L) {
 		{ "total", ltotal },
 		{ "block", lblock },
 		{ "dumpinfo", ldumpinfo },
+		{ "jestat", ljestat },
+		{ "mallctl", lmallctl },
 		{ "dump", ldump },
 		{ "info", dump_mem_lua },
 		{ "current", lcurrent },

service/debug_console.lua

@@ -156,6 +156,7 @@ function COMMAND.help()
 		debug = "debug address : debug a lua service",
 		signal = "signal address sig",
 		cmem = "Show C memory info",
+		jmem = "Show jemalloc mem stats",
 		ping = "ping address",
 		call = "call address ...",
 		trace = "trace address [proto] [on|off]",
@@ -342,6 +343,15 @@ function COMMAND.cmem()
 	return tmp
 end
 
+function COMMAND.jmem()
+	local info = memory.jestat()
+	local tmp = {}
+	for k,v in pairs(info) do
+		tmp[k] = string.format("%11d  %8.2f Mb", v, v/1048576)
+	end
+	return tmp
+end
+
 function COMMAND.ping(address)
 	address = adjust_address(address)
 	local ti = skynet.now()

skynet-src/malloc_hook.c

@@ -127,8 +127,8 @@ static void malloc_oom(size_t size) {
 }
 
 void
-memory_info_dump(void) {
-	je_malloc_stats_print(0,0,0);
+memory_info_dump(const char* opts) {
+	je_malloc_stats_print(0,0, opts);
 }
 
 bool
@@ -241,7 +241,7 @@ skynet_posix_memalign(void **memptr, size_t alignment, size_t size) {
 #define raw_free free
 
 void
-memory_info_dump(void) {
+memory_info_dump(const char* opts) {
 	skynet_error(NULL, "No jemalloc");
 }
 

skynet-src/malloc_hook.h

@@ -7,7 +7,7 @@
 
 extern size_t malloc_used_memory(void);
 extern size_t malloc_memory_block(void);
-extern void   memory_info_dump(void);
+extern void   memory_info_dump(const char *opts);
 extern size_t mallctl_int64(const char* name, size_t* newval);
 extern int    mallctl_opt(const char* name, int* newval);
 extern bool   mallctl_bool(const char* name, bool* newval);