Remove dead test code.
This commit is contained in:
Oliver Jowett
parent
07df054590
commit
014205324a
126
mode_s.c
126
mode_s.c
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@ -173,132 +173,6 @@ void dumpRawMessage(char *descr, unsigned char *msg, uint16_t *m, uint32_t offse
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dumpMagnitudeVector(m,offset);
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printf("---\n\n");
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}
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//
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//=========================================================================
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//
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// Code for testing the timing: run all possible 1- and 2-bit error
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// the test message by all 1-bit errors. Run the old code against
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// all of them, and new the code.
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//
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// Example measurements:
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// Timing old vs. new crc correction code:
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// Old code: 1-bit errors on 112 msgs: 3934 usecs
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// New code: 1-bit errors on 112 msgs: 104 usecs
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// Old code: 2-bit errors on 6216 msgs: 407743 usecs
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// New code: 2-bit errors on 6216 msgs: 5176 usecs
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// indicating a 37-fold resp. 78-fold improvement in speed for 1-bit resp.
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// 2-bit error.
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/*
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unsigned char tmsg0[MODES_LONG_MSG_BYTES] = {
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// Test data: first ADS-B message from testfiles/modes1.bin
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0x8f, 0x4d, 0x20, 0x23, 0x58, 0x7f, 0x34, 0x5e,
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0x35, 0x83, 0x7e, 0x22, 0x18, 0xb2
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};
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#define NTWOBITS (MODES_LONG_MSG_BITS*(MODES_LONG_MSG_BITS-1)/2)
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unsigned char tmsg1[MODES_LONG_MSG_BITS][MODES_LONG_MSG_BYTES];
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unsigned char tmsg2[NTWOBITS][MODES_LONG_MSG_BYTES];
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// Init an array of cloned messages with all possible 1-bit errors present,
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// applied to each message at the respective position
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//
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void inittmsg1() {
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int i, bytepos, mask;
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for (i = 0; i < MODES_LONG_MSG_BITS; i++) {
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bytepos = i >> 3;
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mask = 1 << (7 - (i & 7));
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memcpy(&tmsg1[i][0], tmsg0, MODES_LONG_MSG_BYTES);
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tmsg1[i][bytepos] ^= mask;
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}
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}
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// Run sanity check on all but first 5 messages / bits, as those bits
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// are not corrected.
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//
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void checktmsg1(FILE *out) {
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int i, k;
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uint32_t crc;
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for (i = 5; i < MODES_LONG_MSG_BITS; i++) {
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crc = modesChecksum(&tmsg1[i][0], MODES_LONG_MSG_BITS);
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if (crc != 0) {
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fprintf(out, "CRC not fixed for "
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"positon %d\n", i);
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fprintf(out, " MSG ");
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for (k = 0; k < MODES_LONG_MSG_BYTES; k++) {
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fprintf(out, "%02x", tmsg1[i][k]);
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}
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fprintf(out, "\n");
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}
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}
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}
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void inittmsg2() {
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int i, j, n, bytepos0, bytepos1, mask0, mask1;
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n = 0;
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for (i = 0; i < MODES_LONG_MSG_BITS; i++) {
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bytepos0 = i >> 3;
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mask0 = 1 << (7 - (i & 7));
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for (j = i+1; j < MODES_LONG_MSG_BITS; j++) {
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bytepos1 = j >> 3;
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mask1 = 1 << (7 - (j & 7));
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memcpy(&tmsg2[n][0], tmsg0, MODES_LONG_MSG_BYTES);
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tmsg2[n][bytepos0] ^= mask0;
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tmsg2[n][bytepos1] ^= mask1;
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n += 1;
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}
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}
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}
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long difftvusec(struct timeval *t0, struct timeval *t1) {
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long res = 0;
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res = t1->tv_usec-t0->tv_usec;
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res += (t1->tv_sec-t0->tv_sec)*1000000L;
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return res;
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}
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// the actual test code
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void testAndTimeBitCorrection() {
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struct timeval starttv, endtv;
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int i;
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// Run timing on 1-bit errors
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printf("Timing old vs. new crc correction code:\n");
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inittmsg1();
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gettimeofday(&starttv, NULL);
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for (i = 0; i < MODES_LONG_MSG_BITS; i++) {
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fixSingleBitErrors(&tmsg1[i][0], MODES_LONG_MSG_BITS);
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}
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gettimeofday(&endtv, NULL);
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printf(" Old code: 1-bit errors on %d msgs: %ld usecs\n",
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MODES_LONG_MSG_BITS, difftvusec(&starttv, &endtv));
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checktmsg1(stdout);
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// Re-init
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inittmsg1();
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gettimeofday(&starttv, NULL);
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for (i = 0; i < MODES_LONG_MSG_BITS; i++) {
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fixBitErrors(&tmsg1[i][0], MODES_LONG_MSG_BITS, MODES_MAX_BITERRORS, NULL);
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}
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gettimeofday(&endtv, NULL);
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printf(" New code: 1-bit errors on %d msgs: %ld usecs\n",
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MODES_LONG_MSG_BITS, difftvusec(&starttv, &endtv));
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checktmsg1(stdout);
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// Run timing on 2-bit errors
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inittmsg2();
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gettimeofday(&starttv, NULL);
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for (i = 0; i < NTWOBITS; i++) {
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fixSingleBitErrors(&tmsg2[i][0], MODES_LONG_MSG_BITS);
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}
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gettimeofday(&endtv, NULL);
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printf(" Old code: 2-bit errors on %d msgs: %ld usecs\n",
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NTWOBITS, difftvusec(&starttv, &endtv));
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// Re-init
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inittmsg2();
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gettimeofday(&starttv, NULL);
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for (i = 0; i < NTWOBITS; i++) {
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fixBitErrors(&tmsg2[i][0], MODES_LONG_MSG_BITS, MODES_MAX_BITERRORS, NULL);
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}
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gettimeofday(&endtv, NULL);
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printf(" New code: 2-bit errors on %d msgs: %ld usecs\n",
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NTWOBITS, difftvusec(&starttv, &endtv));
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}
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*/
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//=========================================================================
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//
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// Hash the ICAO address to index our cache of MODES_ICAO_CACHE_LEN
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