stasis-aries-wal/benchmarks/zeroCopy.c

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#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <stasis/transactional.h>
#include <stasis/bufferManager.h>
#include <unistd.h>
#include <stasis/page/raw.h>
#include <string.h>
int main(int argc, char** argv) {
assert(argc == 3);
#define ZEROCOPY 0
#define LSNMODE 1
int mode = atoi(argv[1]);
int count = atoi(argv[2]);
int longsPerPage = PAGE_SIZE / sizeof(long);
if(ZEROCOPY == mode) {
printf("Running ZEROCOPY mode. Count = %d\n", count);
}
Tinit();
int xid = Tbegin();
long * buf = malloc(longsPerPage * sizeof(long));
for(int i = 0; i < count; i++) {
int pageNum = TpageAlloc(xid);
Page * p = loadPage(xid, pageNum);
if(ZEROCOPY == mode) {
long * data = (long*) rawPageGetData(xid, p);
for(int j = 0; j < longsPerPage; j++) {
data[j] = j;
}
rawPageSetData(xid, 0, p); // XXX writelatch!
} else if(LSNMODE == mode) {
long * data = (long*) rawPageGetData(xid, p);
memcpy(buf, data, PAGE_SIZE);
for(int j = 0; j < longsPerPage; j++) {
buf[j] = j;
}
memcpy(data, buf, PAGE_SIZE);
rawPageSetData(xid, 0, p);
}
releasePage(p);
}
Tcommit(xid);
Tdeinit();
}