ems-typed/Tests/strcpy.js

Persistent Shared Memory and Parallel Programming Model

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 |  Extended Memory Semantics (EMS)                            Version 1.5.0   |
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'use strict';
var ems = require('ems')(parseInt(process.argv[2]));
var assert = require('assert');
var maxlen = 20000000;
var stats = ems.new({
    filename: '/tmp/EMS_strlen',
    dimensions: [10],
    heapSize: (2 * maxlen) + 1 + 10,  // 1 = Null,  10 = length of key
    useMap: true,          // Use a key-index mapping, not integer indexes
    setFEtags: 'full',     // Initial full/empty state of array elements
    doDataFill: true,      // Initialize data values
    dataFill: 0            // Initial value of new keys
});

if (ems.myID === 0) { stats.writeXE('test_str', 123); }
ems.barrier();

function stringFill(x, n) {
    var s = '';
    for (;;) {
        if (n & 1) s += x;
        n >>= 1;
        if (n) x += x;
        else break;
    }
    return s;
}

for (var len=2;  len < maxlen;  len = Math.floor(len * 1.5) ) {
    if (ems.myID === 0) { console.log("Len = " + len); }
    var str = stringFill('x', len);
    stats.writeEF('test_str', str);
    var readback = stats.readFE('test_str');
    assert(readback === str, 'Mismatched string.  Expected len ' + str.length + ' got ' + readback.length);
    ems.barrier();
}


for (var len=maxlen;  len >= 1;  len = Math.floor(len * 0.666) ) {
    if (ems.myID === 0) { console.log("Len = " + len); }
    var str = stringFill('y', len);
    stats.writeEF('test_str', str);
    var readback = stats.readFE('test_str');
    assert(readback === str, 'Mismatched string.  Expected len ' + str.length + ' got ' + readback.length);
    ems.barrier();
}