ctxswitch-bench

Benchmark to measure the context switch and syscall costs in a native Linux environment and SGX (using SCONE which performs async and exit-less sycalls).

Build and run

make

sudo taskset -c 0 ./<bin-name>

If you are running in NixOS, we provide the default.nix file. Execute nix-shell prior to building the binaries.

Benchmarks

ctxswitch

It spawns a thread that runs along with the main thread in the same cpu (taskset). They execute the yield-syscall to continously relinguish cpu. It measures the overhead of the scheduler.

ctxswitch-cache_pollution

It spawns a thread that runs along with the main thread in the same cpu (taskset). Each thread pollutes the cache by iterating a per-thread array and they execute the yield-syscall to continously relinguish cpu. It measures the overhead of the scheduler along with the cache-misses overhead.

ctxswitch-pipes

It implements the ping-pong program among two threads.

pipes

It measures the context of the pipe-syscall (single-thread that reads and writes to a pipe.).

syscall

Measures a syscall cost by executing the get_id()-syscall. In SCONE with SGX support this did not worked.

syscall_lat

Measures the latency of a syscall

fibers_ctx

Instead of threads we use userlevel threading (fibers from boost). This was much faster.

Command to run it on UoE scone version (not public)

Hugepagesize=2097152 \ LD_LIBRARY_PATH=/usr/lib/x86_64-linux-gnu/:/usr/lib/gcc/x86_64-linux-gnu/7/ \ SCONE_VERSION=1 SCONE_LOG=0 SCONE_QUEUES=8 SCONE_NO_FS_SHIELD=1 \ SCONE_NO_MMAP_ACCESS=1 SCONE_HEAP=8G SCONE_LD_DEBUG=1 SCONE_MODE=hw \ /opt/scone/lib/ld-scone-x86_64.so.1 ./executable

(from M)

Hugepagesize=2097152 LD_LIBRARY_PATH=/usr/lib/x86_64-linux-gnu/:/usr/lib/gcc/x86_64-linux-gnu/7/ SCONE_VERSION=1 SCONE_LOG=7 SCONE_NO_FS_SHIELD=1 SCONE_NO_MMAP_ACCESS=1 SCONE_HEAP=3584M SCONE_LD_DEBUG=1 /opt/scone/lib/ld-scone-x86_64.so.1 ./server ```

(From DG)

sudo -E Hugepagesize=2097152 LD_LIBRARY_PATH=/usr/lib/x86_64-linux-gnu/:/usr/lib/gcc/x86_64-linux-gnu/7/ SCONE_VERSION=1 SCONE_LOG=0 SCONE_NO_FS_SHIELD=1 SCONE_NO_MMAP_ACCESS=1 SCONE_HEAP=16G SCONE_LD_DEBUG=1 SCONE_MODE=hw SCONE_ESPINS=100000000 SCONE_SSPINS=100000000 SCONE_CONFIG=scone_do.conf /opt/scone/lib/ld-scone-x86_64.so.1 ./db_bench --flagfile test-kernel