From: Bruce Richardson <bruce.richardson@intel.com>
To: dev@dpdk.org
Cc: anatoly.burakov@intel.com,
Bruce Richardson <bruce.richardson@intel.com>,
Kevin Laatz <kevin.laatz@intel.com>
Subject: [dpdk-dev] [PATCH v2] usertools/dpdk-telemetry: print name of app when connected
Date: Tue, 16 Feb 2021 11:39:21 +0000 [thread overview]
Message-ID: <20210216113921.28725-1-bruce.richardson@intel.com> (raw)
In-Reply-To: <20210216094415.28000-1-bruce.richardson@intel.com>
When the dpdk-telemetry client connects to a DPDK instance, we can use the
PID provided in the initial connection message to query from /proc the name
of the process we are connected to, and display that to the user. We use
the "cmdline" procfs entry for the query since that is available on both
Linux and FreeBSD (assuming procfs is mounted on the BSD instance).
Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
---
V2:
Updated with stylistic feedback from Anatoly, and split name query into a
separate function.
---
usertools/dpdk-telemetry.py | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/usertools/dpdk-telemetry.py b/usertools/dpdk-telemetry.py
index 181859658..b2acd92ba 100755
--- a/usertools/dpdk-telemetry.py
+++ b/usertools/dpdk-telemetry.py
@@ -11,6 +11,7 @@
import os
import glob
import json
+import errno
import readline
# global vars
@@ -32,6 +33,20 @@ def read_socket(sock, buf_len, echo=True):
return ret
+def get_app_name(pid):
+ """ return the app name for a given pid, for printing """
+ proc_cmdline = os.path.join('/proc', str(pid), 'cmdline')
+ try:
+ with open(proc_cmdline) as f:
+ argv0 = f.read(1024).split('\0')[0]
+ return os.path.basename(argv0)
+ except IOError as e:
+ # ignore file not found errors
+ if e.errno != errno.ENOENT:
+ raise
+ return None
+
+
def handle_socket(path):
""" Connect to socket and handle user input """
sock = socket.socket(socket.AF_UNIX, socket.SOCK_SEQPACKET)
@@ -45,6 +60,9 @@ def handle_socket(path):
return
json_reply = read_socket(sock, 1024)
output_buf_len = json_reply["max_output_len"]
+ app_name = get_app_name(json_reply["pid"])
+ if app_name:
+ print('Connected to application: "%s"' % app_name)
# get list of commands for readline completion
sock.send("/".encode())
--
2.27.0
next prev parent reply other threads:[~2021-02-16 11:39 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-16 9:44 [dpdk-dev] [PATCH] " Bruce Richardson
2021-02-16 10:40 ` Burakov, Anatoly
2021-02-16 11:02 ` Bruce Richardson
2021-02-16 11:13 ` Burakov, Anatoly
2021-02-16 11:39 ` Bruce Richardson [this message]
2021-02-16 12:19 ` [dpdk-dev] [PATCH v2] " Burakov, Anatoly
2021-02-17 13:57 ` Kevin Laatz
2021-03-25 17:00 ` Thomas Monjalon
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