From dca7ef27596ef24cca4ac18a04d59fba1a888030 Mon Sep 17 00:00:00 2001
From: Jim Harris <james.r.harris@intel.com>
Date: Fri, 30 Apr 2021 22:35:01 +0000
Subject: [PATCH] scripts: add bpf/readv.bt

This script captures a histogram of the returned values
from the readv syscall.  It can be useful for analyzing
the efficiency of our sock/posix implementation.

Signed-off-by: Jim Harris <james.r.harris@intel.com>
Change-Id: I910eb2e81e3416855cda7a3854982cd02476850e
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/7712
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-by: Konrad Sztyber <konrad.sztyber@intel.com>
---
 scripts/bpf/readv.bt | 3 +++
 1 file changed, 3 insertions(+)
 create mode 100644 scripts/bpf/readv.bt

diff --git a/scripts/bpf/readv.bt b/scripts/bpf/readv.bt
new file mode 100644
index 000000000..36abebf56
--- /dev/null
+++ b/scripts/bpf/readv.bt
@@ -0,0 +1,3 @@
+tracepoint:syscalls:sys_exit_readv /pid == __PID__/ {
+	@bytes = hist(args->ret);
+}