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add compile time PACK_STATS option that displays statistics about the number of bytes used per column

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This commit is contained in:
Sears Russell 2008-10-27 23:27:48 +00:00
parent a2a8c73cb5
commit 470c52c9cc
1 changed files with 34 additions and 2 deletions
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36
stasis/page/compression/staticMulticolumn.h
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@ -62,6 +62,13 @@
*/
namespace rose {
//#define PACK_STATS
#ifdef PACK_STATS
static unsigned long long pack_exceptionBytes = 0;
static unsigned long long pack_colBytes[20];
static unsigned long long pack_pageCount = 0;
static int pack_first = 1;
#endif
/**
* A "pageLoaded()" callback function for Stasis' buffer manager.
@ -430,16 +437,42 @@ class StaticMulticolumn {
return 0;
}
}
inline void pack() {
#ifdef PACK_STATS
if(pack_first) {
pack_exceptionBytes = 0;
pack_pageCount = 0;
for(int i = 0; i < N; i++) {
pack_colBytes[i] = 0;
}
pack_first = 0;
}
#define updateColStats(i, comp) \
pack_colBytes[i] += comp->bytes_used()
#else
#define updateColStats(i, comp)
#endif
byte_off_t first_free = 0;
byte_off_t last_free = (intptr_t)(first_header_byte_ptr() - p_->memAddr);
if(unpacked_) {
*exceptions_len_ptr() = last_free - first_exception_byte_;
last_free -= *exceptions_len_ptr();
*exceptions_offset_ptr() = last_free;
#ifdef PACK_STATS
pack_pageCount++;
pack_exceptionBytes += *exceptions_len_ptr();
if(0 == ((pack_pageCount+1) % 1000)) {
printf("%lld pages; %lld exception bytes cols: {", pack_pageCount, pack_exceptionBytes);
for(int i = 0; i < N; i++) {
printf("%lld, ", pack_colBytes[i]);
}
printf("}\n");
}
#endif
#define STATIC_MC_PACK(i,comp) \
if(i < N) { \
updateColStats(i,comp); \
*column_offset_ptr(i) = first_free; \
byte_off_t bytes_used = comp->bytes_used(); \
memcpy(column_base_ptr(i), columns_[i], bytes_used); \
@ -671,5 +704,4 @@ page_impl StaticMulticolumn<N,TUPLE,COMP0,COMP1,COMP2,COMP3,COMP4,COMP5,COMP6,CO
} // namespace rose
#endif // _ROSE_COMPRESSION_STATIC_MULTICOLUMN_H__