Testing apps: Memcached example

[dimakuv]

1. Testing native

• In first terminal: ./memcached --port 11211 --threads=4
• In second terminal: memtier_benchmark --port=11211 --protocol=memcache_binary --hide-histogram

2. Testing native with socat proxy

• In first terminal: ./memcached --port 11212 --threads=4
• In second terminal: socat TCP4-LISTEN:11211,reuseaddr,fork,backlog=256 TCP4-CONNECT:localhost:11212
• In third terminal: memtier_benchmark --port=11211 --protocol=memcache_binary --hide-histogram

3. Testing Gramine-VM/TDX

• In first terminal: QEMU_CPU_NUM=4 gramine-vm memcached
• In second terminal: socat TCP4-LISTEN:11211,reuseaddr,fork,backlog=256 VSOCK-CONNECT:10:11211
• In third terminal: memtier_benchmark --port=11211 --protocol=memcache_binary --hide-histogram

Same for gramine-tdx variant.

Note that we don't specify --port and --threads because Gramine manifest file doesn't allow commandline args. But these are the default values (11211 and 4), so we don't need to specify them anyway.

Explanations

Case (1) is our best case -- normal Memcached invocation. Case (2) shows the overhead of using socat. Case (3) is our Gramine case.