請見底下文件，
  * [[http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.175.4042&rep=rep1&type=pdf|COREMU: a portable and scalable parallel full-system emulator]]
  * [[http://software.intel.com/file/30148|COREMU: a Portable and Scalable Parallel Full-system Emulator]]。
  * [[http://lists.gnu.org/archive/html/qemu-devel/2010-07/msg00964.html|[Qemu-devel] Release of COREMU, a scalable and portable full-system emulator]]
opteron48.iis.sinica.edu.tw
====== 建置 COREMU ======
COREMU 著墨在 system mode，不支援 process mode。COREMU 需要 root 權限設定執行緒的優先權。如果要以一般使用者執行 COREMU，請自己把會噴 assert 的地方關掉。:-D 請閱讀 coremu/README。

  - 安裝 libtopology。請見 [[http://www.open-mpi.org/projects/hwloc/|Portable Hardware Locality]]。<code bash>
$ wget http://sourceforge.net/projects/coremu/files/coremu-img/libtopology-0.9.tar.gz/download
$ tar xvf libtopology-0.9.tar.gz
$ mkdir build; cd build
$ ../libtopology-0.9/configure --prefix=$INSTALL
$ make; make install
</code>
  - 安裝 COREMU。<code bash>
$ wget http://sourceforge.net/projects/coremu/files/coremu-0.1.2.tar.gz/download
# coremu-0.1.2 目錄底下分別有兩個目錄:
# coremu: COREMU 核心函式庫
# qemu: QEMU 0.13 補丁版
$ tar xvf coremu-0.1.2.tar.gz
$ cd coremu
# 修改 configure。
# --extra-cflags="-I${coremuroot}/incl -g -I/tmp/chenwj/install" \
# --extra-ldflags="-L/tmp/chenwj/install/lib" \
# 將 PKG_CONFIG_PATH 指向編譯 libtopology 所在的目錄 
$ export PKG_CONFIG_PATH=$BUILD/topology.pc
$ ./configure --target=arm --prefix=$INSTALL ../qemu
$ make; make install
</code>
  - 下載映像檔。<code bash>
$ wget http://sourceforge.net/projects/coremu/files/coremu-img/debian-x86_64.img.gz/download
$ cd coremu/scripts
$ export LD_LIBRARY_PATH=/PATH/TO/libtopology.so
$ ./x86_64-linux.sh <path2qemu> <path2img> <core number>
$ ./arm-linux.sh ~/install/atomic/bin/qemu-system-arm arm-zImage-2.6.28 arm-initrd.gz 1
</code>
====== Internal ======
  - 進入主要執行迴圈之前，COREMU 會做額外初始化。<code c>
static void main_loop(void)
{
    int r;
#ifdef CONFIG_COREMU
    /* 1. Not finish: need some initialization */

    /* 2. register hook functions */
    /* register the interrupt handler */
    coremu_register_event_handler((void (*)(void*))cm_common_intr_handler);
    /* register the event notifier */
    coremu_register_event_notifier(cm_notify_event);

    /* 3. register core alarm handler. */
    struct sigaction act;
    sigfillset(&act.sa_mask);
    act.sa_flags = 0;
    act.sa_handler = cm_local_host_alarm_handler;
    sigaction(COREMU_CORE_ALARM, &act, NULL);

    /* 4. Create cpu thread body*/
    coremu_run_all_cores(cm_cpu_loop);  // coremu_run_all_cores coremu/main/core.c cm_cpu_loop (qemu/cm-loop.c)
#else
    qemu_main_loop_start();
</code>

針對客戶的 atomic 指令，COREMU 會另行處理。以 x86 為例，
  - xchg 為 atomic 指令。<code c>
    case 0x87: /* xchg Ev, Gv */
        if ((b & 1) == 0)
            ot = OT_BYTE;
        else
            ot = dflag + OT_WORD;
        modrm = ldub_code(s->pc++);
        reg = ((modrm >> 3) & 7) | rex_r;
        mod = (modrm >> 6) & 3;
        if (mod == 3) {
            rm = (modrm & 7) | REX_B(s);
        do_xchg_reg:
            gen_op_mov_TN_reg(ot, 0, reg);
            gen_op_mov_TN_reg(ot, 1, rm);
            gen_op_mov_reg_T0(ot, rm);
            gen_op_mov_reg_T1(ot, reg);
        } else {
            gen_lea_modrm(s, modrm, &reg_addr, &offset_addr);

#ifdef CONFIG_COREMU
            /* for xchg, lock is implicit.
               XXX: none flag is affected! */
            switch (ot & 3) {
            case 0:
                gen_helper_xchgb(cpu_A0, tcg_const_i32(reg),
                        tcg_const_i32(X86_64_HREGS));
                break;
            case 1:
                gen_helper_xchgw(cpu_A0, tcg_const_i32(reg),
                        tcg_const_i32(X86_64_HREGS));
                break;
            case 2:
                gen_helper_xchgl(cpu_A0, tcg_const_i32(reg),
                        tcg_const_i32(X86_64_HREGS));
                break;
#ifdef TARGET_X86_64
                case 3:
                gen_helper_xchgq(cpu_A0, tcg_const_i32(reg),
                        tcg_const_i32(x86_64_hregs));
#endif
            }
#else
</code>
  - 呼叫 COREMU 自行定義的 helper function (target-i386/cm-atomic.c)。<code c>
#define GEN_ATOMIC_XCHG(type) \
void helper_xchg##type(target_ulong a0, int reg, int hreg)    \
{                                                             \
    DATA_##type val, out;                                     \
    unsigned long q_addr;                                     \
                                                              \
    CM_GET_QEMU_ADDR(q_addr, a0);                             \
    val = (DATA_##type)cm_get_reg_val(OT_##type, hreg, reg);  \
    out = atomic_exchange##type((DATA_##type *)q_addr, val);  \
    mb();                                                     \
                                                              \
    cm_set_reg_val(OT_##type, hreg, reg, out);                \
}
</code>
====== 外部連結 ======
  * [[http://sourceforge.net/p/coremu/home/Home/|COREMU]]