Class: MPipe

Inherits:
Data
  • Object
show all
Defined in:
lib/mpipe.rb,
lib/mpipe/version.rb,
ext/mpipe/mpipe.c

Defined Under Namespace

Modules: Comm

Constant Summary collapse

VERSION = 
"0.3.0"
MPI_VERSION = 
INT2NUM(MPI_VERSION)
MPI_SUBVERSION = 
INT2NUM(MPI_SUBVERSION)
SUCCESS = 
INT2NUM(MPI_SUCCESS)
PROC_NULL = 
INT2NUM(MPI_PROC_NULL)
@@min_poll = 
0.01
@@max_poll = 
0.32

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#new(string = ""[, mode]) ⇒ Object

Creates new MPipe instance from with string and mode.



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# File 'ext/mpipe/mpipe.c', line 226

static VALUE
mp_initialize(VALUE self, VALUE rank)
{
    struct MPipe *ptr = check_mpipe(self);

    if (!ptr) {
	DATA_PTR(self) = ptr = mp_alloc();
    }
    rb_call_super(0, 0);
    return mp_init(ptr, self, rank);
}

Class Method Details

.abort(rerror) ⇒ Object 



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# File 'ext/mpipe/mpipe.c', line 82

static VALUE
mp_mpi_abort(VALUE klass, VALUE rerror)
{
    int ierror;

    ierror = MPI_Abort(MPI_COMM_WORLD, NUM2INT(rerror));
    return INT2NUM(ierror);
}

.buffer_size ⇒ Object 



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# File 'ext/mpipe/mpipe.c', line 91

static VALUE
mp_mpi_buffer_size(VALUE mod)
{
    return INT2NUM(mp_buffer_size);
}

.buffer_size=(size) ⇒ Object 



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# File 'ext/mpipe/mpipe.c', line 97

static VALUE
mp_mpi_set_buffer_size(VALUE mod, VALUE size)
{
    if (mp_initialized) {
        rb_raise(rb_eStandardError,"buffer_size must be set before MPipe.init");
    }
    mp_buffer_size = NUM2INT(size);
    return size;
}

.finalize ⇒ Object 



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# File 'ext/mpipe/mpipe.c', line 75

static VALUE
mp_mpi_finalize(VALUE klass)
{
    mp_finalize();
    return Qnil;
}

.init(*args) ⇒ Object

MPI



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# File 'ext/mpipe/mpipe.c', line 39

static VALUE
mp_mpi_init(int argc, VALUE *argv, VALUE klass)
{
    char **cargv;
    VALUE progname, mpipe_ary;
    int i, size;

    cargv = ALLOCA_N(char *, argc+1);
    progname = rb_gv_get("$0");
    cargv[0] = StringValueCStr(progname);

    for(i=0; i<argc; i++) {
        if (TYPE(argv[i]) == T_STRING) {
            cargv[i+1] = StringValueCStr(argv[i]);
        } else {
            rb_raise(rb_eArgError, "argument must be string");
        }
    }
    argc++;

    MPI_Init(&argc, &cargv);

    if (mp_initialized) {
        return Qnil;
    } else {
        mp_initialized = 1;
    }
    atexit(mp_finalize);

    MPI_Comm_size(MPI_COMM_WORLD, &size);
    mpipe_ary = rb_ary_new2(size);
    rb_ivar_set(klass, id_allocated_mpipe, mpipe_ary);

    return Qnil;
}

.max_polling_interval=(time) ⇒ Object 



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# File 'lib/mpipe.rb', line 13

def self.max_polling_interval=(time)
  @@max_poll = time
end

.min_polling_interval=(time) ⇒ Object 



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# File 'lib/mpipe.rb', line 9

def self.min_polling_interval=(time)
  @@min_poll = time
end

.new(vrank) ⇒ Object

:nodoc:



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# File 'ext/mpipe/mpipe.c', line 239

static VALUE
mp_s_new(VALUE klass, VALUE vrank)
{
    VALUE mpipe, mpipe_ary;
    int rank;

    rank = NUM2INT(vrank);
    mpipe_ary = rb_ivar_get(klass, id_allocated_mpipe);
    mpipe = rb_ary_entry(mpipe_ary, rank);
    if (NIL_P(mpipe)) {
        mpipe = rb_class_new_instance(1, &vrank, klass);
        rb_ary_store(mpipe_ary, rank, mpipe);
    }
    return mpipe;
}

.select(rd_ary, wt_ary = nil, er_ary = nil, timeout = nil) ⇒ Object

emulate IO.select



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# File 'lib/mpipe.rb', line 18

def self.select(rd_ary, wt_ary=nil, er_ary=nil, timeout=nil)
  rd_ary = [] if rd_ary.nil?
  wt_ary = [] if wt_ary.nil?
  rd_mpi = []
  rd_io = []
  wt_io = []
  rd_ret = Array.new(rd_ary.size)
  wt_ret = Array.new(wt_ary.size)
  rd_idx = {}
  wt_idx = {}
  found = false

  rd_ary.each_with_index do |rd,i|
    rd_idx[rd] = i
    case rd
    when MPipe
      rd_mpi << rd
      if rd.test_recv
        rd_ret[i] = rd
        found = true
      end
    when IO
      rd_io << rd
    else
      raise ArgumentError, "elements should be IO or MPipe"
    end
  end

  wt_ary.each_with_index do |wt,i|
    wt_idx[wt] = i
    case wt
    when MPipe
      wt_ret[i] = wt
      found = true
    when IO
      wt_io << wt
    else
      raise ArgumentError, "elements should be IO or MPipe"
    end
  end

  if er_ary
    er_ary.each do |er|
      if !er.kind_of?(IO)
        raise ArgumentError, "er_ary contains non-IO object"
      end
    end
  end

  time_start = Time.now

  # first check
  rd_res,wt_res,er_res = IO.select(rd_io, wt_io, er_ary, 0)
  if rd_res
    rd_res.each{|io| rd_ret[rd_idx[io]] = io}
    found = true
  end
  if wt_res
    wt_res.each{|io| wt_ret[wt_idx[io]] = io}
    found = true
  end
  if er_res
    found = true
  end
  if found
    return [rd_ret.compact, wt_ret.compact, er_res]
  end

  dt = @@min_poll
  max_dt = @@max_poll
  loop do
    if timeout
      elap = Time.now - time_start
      if timeout <= elap
        return nil
      else
        dto = timeout - elap
        dt = (dto < dt) ? dto : dt
      end
    end

    # check with timeout
    rd_res,wt_res,er_res = IO.select(rd_io, wt_io, er_ary, dt)

    if rd_res
      rd_res.each{|io| rd_ret[rd_idx[io]] = io}
      found = true
    end
    if wt_res
      wt_res.each{|io| wt_ret[wt_idx[io]] = io}
      found = true
    end
    if er_res
      found = true
    end
    rd_mpi.each do |mp|
      if mp.test_recv
        rd_ret[rd_idx[mp]] = mp
        found = true
      end
    end
    if found
      return [rd_ret.compact,wt_ret.compact,er_res]
    end
    if dt != max_dt
      dt *= 2 if dt < max_dt
      dt = max_dt if dt > max_dt
    end
  end
end

Instance Method Details

#close ⇒ Object

#closed? ⇒ Boolean

Returns:

  • (Boolean)

#flush ⇒ Object

#print(str) ⇒ Object 



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# File 'ext/mpipe/mpipe.c', line 334

static VALUE
mp_write(VALUE self, VALUE str)
{
    struct MPipe *ptr = MPipe(self);
    int istat;
    int pos, count;

    str = StringValue(str);
    pos = 0;

    while (pos < RSTRING_LEN(str)) {
        count = RSTRING_LEN(str) - pos;
        if (count > mp_buffer_size) {
            count = mp_buffer_size;
        }
        memcpy(ptr->send_buffer, RSTRING_PTR(str)+pos, count);

        istat = MPI_Send(ptr->send_buffer, count, MPI_CHAR, ptr->rank,
                         0, MPI_COMM_WORLD);
        if (istat != MPI_SUCCESS) {
            rb_raise(rb_eStandardError,"MPI_Send failed with status=%d\n",istat);
        }

        pos += count;
    }
    return INT2NUM(pos);
}

#rank ⇒ Object

Returns rank.



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# File 'ext/mpipe/mpipe.c', line 259

static VALUE
mp_rank(VALUE self)
{
    struct MPipe *ptr = MPipe(self);
    return INT2NUM(ptr->rank);
}

#read(length[, outbuf]) ⇒ String?

Reads length bytes from the I/O stream.

length must be a non-negative integer.

Returns:

  • (String, nil) 


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# File 'ext/mpipe/mpipe.c', line 390

static VALUE
mp_read(int argc, VALUE *argv, VALUE self)
{
    struct MPipe *ptr = MPipe(self);
    MPI_Status status;
    int istat;
    int outbuf_pos = 0;
    int max_len;
    VALUE maxlen = Qnil;
    VALUE outbuf = Qnil;

    rb_scan_args(argc, argv, "11", &maxlen, &outbuf);

    max_len = NUM2INT(maxlen);
    if (max_len < 0) {
        rb_raise(rb_eArgError, "negative length %d given", max_len);
    }

    if (NIL_P(outbuf)) {
        outbuf = rb_str_new(0, 0);
    }
    rb_str_resize(outbuf, max_len);

    if (ptr->recv_count == -1) { // requesting
        istat = MPI_Wait(&ptr->recv_request, &status);
        if (istat != MPI_SUCCESS) {
            rb_raise(rb_eStandardError,"MPI_Wait failed with status=%d",istat);
        }
        MPI_Get_count(&status, MPI_CHAR, &ptr->recv_count);
    }

    if (ptr->recv_count > 0) {
        outbuf_pos += copy_substr(ptr, max_len, outbuf, outbuf_pos);
    }

    while (outbuf_pos < max_len) {
        istat = MPI_Recv(ptr->recv_buffer, mp_buffer_size, MPI_CHAR, ptr->rank,
                         0, MPI_COMM_WORLD, &status);
        if (istat != MPI_SUCCESS) {
            rb_raise(rb_eStandardError,"MPI_Recv failed with status=%d\n",istat);
        }
        MPI_Get_count(&status, MPI_CHAR, &ptr->recv_count);

        outbuf_pos += copy_substr(ptr, max_len, outbuf, outbuf_pos);
    }

    return outbuf;
}

#read_nonblock(maxlen[, outbuf [, opts]]) ⇒ String

Similar to #read, but raises EOFError at end of string unless the exception: false option is passed in.

Returns:

  • (String) 


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# File 'ext/mpipe/mpipe.c', line 487

static VALUE
mp_read_nonblock(int argc, VALUE *argv, VALUE self)
{
    struct MPipe *ptr = MPipe(self);
    int outbuf_pos = 0;
    int max_len;
    VALUE maxlen = Qnil;
    VALUE outbuf = Qnil;
    VALUE opts = Qnil;

    rb_scan_args(argc, argv, "11:", &maxlen, &outbuf, &opts);

    max_len = NUM2INT(maxlen);
    if (max_len < 0) {
        rb_raise(rb_eArgError, "negative length %d given", max_len);
    }

    if (NIL_P(outbuf)) {
        outbuf = rb_str_new(0, 0);
    }
    rb_str_resize(outbuf, max_len);

    if (maxlen == 0) {
        return outbuf;
    }

    if (ptr->recv_count == -1) { // requesting
        if (call_test(ptr) == 0) {
            if (!NIL_P(opts) && rb_hash_lookup2(opts, sym_exception, Qundef) == Qfalse) {
                return Qnil;
            } else {
                rb_raise(eEAGAINWaitReadable,"MPI_Irecv would block");
            }
        }
    }
    if (ptr->recv_count > 0) {
        outbuf_pos += copy_substr(ptr, max_len, outbuf, outbuf_pos);
    }

    while (outbuf_pos < max_len) {
        call_irecv(ptr);
        if (call_test(ptr) == 0) {
            if (outbuf_pos > 0) {
                rb_str_resize(outbuf, outbuf_pos);
                return outbuf;
            } else
            if (!NIL_P(opts) && rb_hash_lookup2(opts, sym_exception, Qundef) == Qfalse) {
                return Qnil;
            } else {
                rb_raise(eEAGAINWaitReadable,"MPI_Irecv would block");
            }
        }
        outbuf_pos += copy_substr(ptr, max_len, outbuf, outbuf_pos);
    }
    return outbuf;
}

#test_recv ⇒ Boolean

calls MPI_Test

Returns:

  • (Boolean) 


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# File 'ext/mpipe/mpipe.c', line 551

static VALUE
mp_test_recv(VALUE self)
{
    struct MPipe *ptr = MPipe(self);

    call_irecv(ptr);
    if (ptr->recv_count == -1) { // requesting
        call_test(ptr);
    }
    if (ptr->recv_count > 0) {
        return Qtrue;
    } else {
        return Qfalse;
    }
}

#write(str) ⇒ Object 



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# File 'ext/mpipe/mpipe.c', line 334

static VALUE
mp_write(VALUE self, VALUE str)
{
    struct MPipe *ptr = MPipe(self);
    int istat;
    int pos, count;

    str = StringValue(str);
    pos = 0;

    while (pos < RSTRING_LEN(str)) {
        count = RSTRING_LEN(str) - pos;
        if (count > mp_buffer_size) {
            count = mp_buffer_size;
        }
        memcpy(ptr->send_buffer, RSTRING_PTR(str)+pos, count);

        istat = MPI_Send(ptr->send_buffer, count, MPI_CHAR, ptr->rank,
                         0, MPI_COMM_WORLD);
        if (istat != MPI_SUCCESS) {
            rb_raise(rb_eStandardError,"MPI_Send failed with status=%d\n",istat);
        }

        pos += count;
    }
    return INT2NUM(pos);
}

#write_nonblock(str) ⇒ Object 



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# File 'ext/mpipe/mpipe.c', line 334

static VALUE
mp_write(VALUE self, VALUE str)
{
    struct MPipe *ptr = MPipe(self);
    int istat;
    int pos, count;

    str = StringValue(str);
    pos = 0;

    while (pos < RSTRING_LEN(str)) {
        count = RSTRING_LEN(str) - pos;
        if (count > mp_buffer_size) {
            count = mp_buffer_size;
        }
        memcpy(ptr->send_buffer, RSTRING_PTR(str)+pos, count);

        istat = MPI_Send(ptr->send_buffer, count, MPI_CHAR, ptr->rank,
                         0, MPI_COMM_WORLD);
        if (istat != MPI_SUCCESS) {
            rb_raise(rb_eStandardError,"MPI_Send failed with status=%d\n",istat);
        }

        pos += count;
    }
    return INT2NUM(pos);
}