From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id 992C4A0032; Fri, 1 Oct 2021 13:16:33 +0200 (CEST) Received: from [217.70.189.124] (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 30A084115C; Fri, 1 Oct 2021 13:16:26 +0200 (CEST) Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by mails.dpdk.org (Postfix) with ESMTP id D58E340040 for ; Fri, 1 Oct 2021 13:16:23 +0200 (CEST) X-IronPort-AV: E=McAfee;i="6200,9189,10123"; a="225060807" X-IronPort-AV: E=Sophos;i="5.85,337,1624345200"; d="scan'208";a="225060807" Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Oct 2021 04:16:23 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.85,337,1624345200"; d="scan'208";a="619024628" Received: from silpixa00399126.ir.intel.com ([10.237.223.151]) by fmsmga001.fm.intel.com with ESMTP; 01 Oct 2021 04:16:22 -0700 From: Bruce Richardson To: dev@dpdk.org Cc: Ciara Power , David Marchand , Anatoly Burakov , Kevin Traynor , Bruce Richardson Date: Fri, 1 Oct 2021 12:15:57 +0100 Message-Id: <20211001111559.14043-4-bruce.richardson@intel.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20211001111559.14043-1-bruce.richardson@intel.com> References: <20210915141030.23514-1-bruce.richardson@intel.com> <20211001111559.14043-1-bruce.richardson@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Subject: [dpdk-dev] [PATCH v4 3/5] telemetry: use unique socket paths for in-memory mode X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" When DPDK is run using "in-memory" flag, multiple processes can be run using the same file-prefix and hence the same runtime directory. To avoid problems with conflicting telemetry unix socket paths, we can put the pid of the process into the socket name. As with the existing telemetry socket files, these sockets are removed on normal program exit. Signed-off-by: Bruce Richardson --- doc/guides/howto/telemetry.rst | 17 ++++++++++++++++- lib/eal/freebsd/eal.c | 1 + lib/eal/linux/eal.c | 1 + lib/telemetry/telemetry.c | 15 ++++++++++++--- lib/telemetry/telemetry_internal.h | 3 ++- 5 files changed, 32 insertions(+), 5 deletions(-) diff --git a/doc/guides/howto/telemetry.rst b/doc/guides/howto/telemetry.rst index 8f4fa1a510..8a61302459 100644 --- a/doc/guides/howto/telemetry.rst +++ b/doc/guides/howto/telemetry.rst @@ -13,12 +13,27 @@ ethdev port list, and eal parameters. Telemetry Interface ------------------- -The :doc:`../prog_guide/telemetry_lib` opens a socket with path +For applications run normally, i.e. without the `--in-memory` EAL flag, +the :doc:`../prog_guide/telemetry_lib` opens a socket with path */dpdk_telemetry.*. The version represents the telemetry version, the latest is v2. For example, a client would connect to a socket with path */var/run/dpdk/\*/dpdk_telemetry.v2* (when the primary process is run by a root user). +For applications run with the `--in-memory` EAL flag, +the socket file is created with an additional suffix of the process PID. +This is because multiple independent DPDK processes can be run simultaneously +using the same runtime directory when *in-memory* mode is used. +For example, when a user with UID 1000 runs processes with in-memory mode, +we would find sockets available such as:: + + /run/user/1000/dpdk/rte/dpdk_telemetry.v2.1982 + /run/user/1000/dpdk/rte/dpdk_telemetry.v2.1935 + +Where `/run/user/` is the runtime directory for the user given by the +`$XDG_RUNTIME_DIR` environment variable, +and `rte` is the default DPDK file prefix used for a runtime directory. + Telemetry Initialization ------------------------ diff --git a/lib/eal/freebsd/eal.c b/lib/eal/freebsd/eal.c index b06a2c1662..ed39d10b4e 100644 --- a/lib/eal/freebsd/eal.c +++ b/lib/eal/freebsd/eal.c @@ -952,6 +952,7 @@ rte_eal_init(int argc, char **argv) if (tlog < 0) tlog = RTE_LOGTYPE_EAL; if (rte_telemetry_init(rte_eal_get_runtime_dir(), + internal_conf->in_memory | internal_conf->no_shconf, rte_version(), &internal_conf->ctrl_cpuset, rte_log, tlog) != 0) return -1; diff --git a/lib/eal/linux/eal.c b/lib/eal/linux/eal.c index 0d0fc66668..9db4eb7913 100644 --- a/lib/eal/linux/eal.c +++ b/lib/eal/linux/eal.c @@ -1326,6 +1326,7 @@ rte_eal_init(int argc, char **argv) if (tlog < 0) tlog = RTE_LOGTYPE_EAL; if (rte_telemetry_init(rte_eal_get_runtime_dir(), + internal_conf->in_memory | internal_conf->no_shconf, rte_version(), &internal_conf->ctrl_cpuset, rte_log, tlog) != 0) return -1; diff --git a/lib/telemetry/telemetry.c b/lib/telemetry/telemetry.c index 78508c1a1d..0e5ef29fff 100644 --- a/lib/telemetry/telemetry.c +++ b/lib/telemetry/telemetry.c @@ -51,6 +51,7 @@ static struct socket v1_socket; /* socket for v1 telemetry */ static const char *telemetry_version; /* save rte_version */ static const char *socket_dir; /* runtime directory */ +static bool socket_uses_pid; /* for in-memory mode, we need different socket paths */ static rte_cpuset_t *thread_cpuset; static rte_log_fn rte_log_ptr; static uint32_t logtype; @@ -432,8 +433,14 @@ static inline char * get_socket_path(const char *runtime_dir, const int version) { static char path[PATH_MAX]; - snprintf(path, sizeof(path), "%s/dpdk_telemetry.v%d", - strlen(runtime_dir) ? runtime_dir : "/tmp", version); + if (!socket_uses_pid) + snprintf(path, sizeof(path), "%s/dpdk_telemetry.v%d", + strlen(runtime_dir) ? runtime_dir : "/tmp", version); + else + snprintf(path, sizeof(path), "%s/dpdk_telemetry.v%d.%u", + strlen(runtime_dir) ? runtime_dir : "/tmp", + version, + (unsigned int)getpid()); return path; } @@ -587,11 +594,13 @@ telemetry_v2_init(void) #endif /* !RTE_EXEC_ENV_WINDOWS */ int32_t -rte_telemetry_init(const char *runtime_dir, const char *rte_version, rte_cpuset_t *cpuset, +rte_telemetry_init(const char *runtime_dir, bool in_memory, + const char *rte_version, rte_cpuset_t *cpuset, rte_log_fn log_fn, uint32_t registered_logtype) { telemetry_version = rte_version; socket_dir = runtime_dir; + socket_uses_pid = in_memory; /* for in-memory mode use pid in sock path for uniqueness */ thread_cpuset = cpuset; rte_log_ptr = log_fn; logtype = registered_logtype; diff --git a/lib/telemetry/telemetry_internal.h b/lib/telemetry/telemetry_internal.h index d085c492dc..d8fb37a633 100644 --- a/lib/telemetry/telemetry_internal.h +++ b/lib/telemetry/telemetry_internal.h @@ -109,7 +109,8 @@ typedef int (*rte_log_fn)(uint32_t level, uint32_t logtype, const char *format, */ __rte_internal int -rte_telemetry_init(const char *runtime_dir, const char *rte_version, rte_cpuset_t *cpuset, +rte_telemetry_init(const char *runtime_dir, bool in_memory, + const char *rte_version, rte_cpuset_t *cpuset, rte_log_fn log_fn, uint32_t registered_logtype); #endif -- 2.30.2