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Improve Delta2 performance.

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This commit is contained in:
Moinak Ghosh 2012-12-20 23:49:44 +05:30
parent e9c3b34ff5
commit 9bd8146e88
1 changed files with 9 additions and 9 deletions
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18
delta2/delta2.c
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@ -174,7 +174,7 @@ delta2_encode_real(uchar_t *src, uint64_t srclen, uchar_t *dst, uint64_t *dstlen
uint64_t snum, gtot1, gtot2, tot; uint64_t snum, gtot1, gtot2, tot;
uint64_t cnt, val, sval; uint64_t cnt, val, sval;
uint64_t vl1, vl2, vld1, vld2; uint64_t vl1, vl2, vld1, vld2;
uchar_t *pos, *pos1, *pos2, stride, st1; uchar_t *pos, *pos2, stride, st1;
uchar_t strides[4] = {3, 5, 7, 8}; uchar_t strides[4] = {3, 5, 7, 8};
int st, sz; int st, sz;
@ -241,9 +241,7 @@ delta2_encode_real(uchar_t *src, uint64_t srclen, uchar_t *dst, uint64_t *dstlen
vld1 = 0; vld1 = 0;
gtot1 = 0; gtot1 = 0;
pos = src; pos = src;
pos1 = dst;
pos2 = dst; pos2 = dst;
pos1 += LIT_HDR;
gtot2 = 0; gtot2 = 0;
if (rle_thresh <= TRANSP_THRESH) { if (rle_thresh <= TRANSP_THRESH) {
@ -284,6 +282,7 @@ delta2_encode_real(uchar_t *src, uint64_t srclen, uchar_t *dst, uint64_t *dstlen
*((uint64_t *)pos2) = htonll(gtot1); *((uint64_t *)pos2) = htonll(gtot1);
pos2 += sizeof (uint64_t); pos2 += sizeof (uint64_t);
DEBUG_STAT_EN(*hdr_ovr += LIT_HDR); DEBUG_STAT_EN(*hdr_ovr += LIT_HDR);
memcpy(pos2, pos - (gtot1+snum), gtot1);
} }
pos2 += gtot1; pos2 += gtot1;
gtot1 = 0; gtot1 = 0;
@ -300,7 +299,6 @@ delta2_encode_real(uchar_t *src, uint64_t srclen, uchar_t *dst, uint64_t *dstlen
pos2 += sizeof (uint64_t); pos2 += sizeof (uint64_t);
*((uint64_t *)pos2) = htonll(vld1); *((uint64_t *)pos2) = htonll(vld1);
pos2 += sizeof (uint64_t); pos2 += sizeof (uint64_t);
pos1 = pos2 + LIT_HDR;
DEBUG_STAT_EN(*hdr_ovr += DELTA_HDR); DEBUG_STAT_EN(*hdr_ovr += DELTA_HDR);
} else { } else {
gtot1 += snum; gtot1 += snum;
@ -310,8 +308,6 @@ delta2_encode_real(uchar_t *src, uint64_t srclen, uchar_t *dst, uint64_t *dstlen
snum = 0; snum = 0;
sval = vl2; sval = vl2;
} }
*((uint64_t *)pos1) = val;
pos1 += stride;
snum += stride; snum += stride;
vld1 = vld2; vld1 = vld2;
vl1 = vl2; vl1 = vl2;
@ -324,9 +320,11 @@ delta2_encode_real(uchar_t *src, uint64_t srclen, uchar_t *dst, uint64_t *dstlen
*pos2 = 0; *pos2 = 0;
pos2++; pos2++;
*((uint64_t *)pos2) = htonll(gtot1); *((uint64_t *)pos2) = htonll(gtot1);
pos2 += (gtot1 + sizeof (uint64_t)); pos2 += sizeof (uint64_t);
gtot1 = 0;
DEBUG_STAT_EN(*hdr_ovr += LIT_HDR); DEBUG_STAT_EN(*hdr_ovr += LIT_HDR);
memcpy(pos2, pos - (gtot1+snum), gtot1);
pos2 += gtot1;
gtot1 = 0;
} }
*pos2 = stride; *pos2 = stride;
pos2++; pos2++;
@ -343,8 +341,10 @@ delta2_encode_real(uchar_t *src, uint64_t srclen, uchar_t *dst, uint64_t *dstlen
*pos2 = 0; *pos2 = 0;
pos2++; pos2++;
*((uint64_t *)pos2) = htonll(gtot1); *((uint64_t *)pos2) = htonll(gtot1);
pos2 += (gtot1 + sizeof (uint64_t)); pos2 += sizeof (uint64_t);
DEBUG_STAT_EN(*hdr_ovr += LIT_HDR); DEBUG_STAT_EN(*hdr_ovr += LIT_HDR);
memcpy(pos2, pos - gtot1, gtot1);
pos2 += gtot1;
} else { } else {
gtot1 += snum; gtot1 += snum;
} }