wrk is a HTTP Benchmarking tool. It can generate significant amount of load on a HTTP server. Here is an example how it works.

wrk -t12 -c400 -d30s http://127.0.0.1:8080/index.html

This runs a benchmark for 30 seconds, using 12 threads, and keeping 400 HTTP connections open.

Output:

Running 30s test @ http://127.0.0.1:8080/index.html
  12 threads and 400 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency   635.91us    0.89ms  12.92ms   93.69%
    Req/Sec    56.20k     8.07k   62.00k    86.54%
  22464657 requests in 30.00s, 17.76GB read
Requests/sec: 748868.53
Transfer/sec:    606.33MB

wrk requires LuaJIT and OpenSSL as dependencies.

You may face the following issues while you will be trying to build and install wrk on IBM Power Systems(ppc64le).

In file included from src/wrk.c:3:
src/wrk.h:11:10: fatal error: openssl/ssl.h: No such file or directory
 #include <openssl/ssl.h>
          ^~~~~~~~~~~~~~~

To solve the above issue you need to install openssl-devel package.

In file included from src/wrk.c:3:
src/wrk.h:13:10: fatal error: lua.h: No such file or directory
 #include <lua.h>
          ^~~~~~~

To solve this issue, luajit need to be system include and lib path. Find How to install LuaJIT on IBM Power Systems.

So you can follow the below steps to install wrk on IBM Power Systems(ppc64le platform).

# Install openssl-devel package
yum install openssl-devel

# git clone wrk
git clone https://github.com/wg/wrk.git
cd wrk

# put luajit under include and lib
ln -sf /usr/local/include/luajit-2.1/ /usr/include/luajit-2.1
ln -sf /usr/local/lib/libluajit-5.1.so.2 /usr/lib64/libluajit-5.1.so.2
sed -i 's/WITH_LUAJIT)\/include$/WITH_LUAJIT)\/include\/luajit-2.1/' Makefile

# build and install wrk
make WITH_LUAJIT=/usr WITH_OPENSSL=/usr