tcmalloc code sample

This example shows how to use tcmalloc in rust-sgx enclaves.

This tcmalloc is provided by Intel and located at ${SGXSDK}/lib64/libsgx_tcmalloc.a. To link against tcmalloc, the following link flag is required, and placed before link flag of -lsgx_tstdc:

-Wl,--whole-archive -lsgx_tcmalloc -Wl,--no-whole-archive

One shot

$ make TCMALLOC=1

This would enable the linking flag -lsgx_tcmalloc.

$ make

This would use the default ‘dlmalloc’.

Comparison with traditional allocator (dlmalloc)

We provide a sample workload which only allocate buffers:

fn recursive_memory_func(x: u64, multiplier: u64) -> u64 {
    let v: Vec<u64> = Vec::with_capacity((x * multiplier) as usize);
    let p: u64 = v.as_ptr() as u64;
    //println!("ptr = {:X}", p);
    if x != 0 {
        p + recursive_memory_func(x - 1, multiplier)
    } else { p }
}

Small buffer test settings: multiplier = 1 and initiate x = 2000.

Large buffer test settings: multiplier = 100 and initiate x = 1000.

Please test the performance by yourself. Here is my result (i9-9900k, DDR4-3200):