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platform_system_core
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logd: statistics report chatty effective percentage 

Report the ESTIMATED instantaneous percentage decrease or increase
that an UID has to the logs as a result of the chatty filtration.

Bug: 22855208
Change-Id: If1e77afb81a2739a72b39bc7c57071763c1d64d8
This commit is contained in:
Mark Salyzyn 2015-08-24 11:08:00 -07:00
parent 932f7acc81
commit c723df805a
2 changed files with 57 additions and 5 deletions
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60
logd/LogStatistics.cpp
View File

@ -190,13 +190,13 @@ std::string UidEntry::formatHeader(const std::string &name, log_id_t id) const {
return formatLine(android::base::StringPrintf(
name.c_str(), android_log_id_to_name(id)),
std::string("Size"),
std::string(isprune ? "Pruned" : ""))
std::string(isprune ? "+/- Pruned" : ""))
+ formatLine(std::string("UID PACKAGE"),
std::string("BYTES"),
std::string(isprune ? "NUM" : ""));
}
std::string UidEntry::format(const LogStatistics &stat, log_id_t /* id */) const {
std::string UidEntry::format(const LogStatistics &stat, log_id_t id) const {
uid_t uid = getKey();
std::string name = android::base::StringPrintf("%u", uid);
const char *nameTmp = stat.uidToName(uid);
@ -210,9 +210,59 @@ std::string UidEntry::format(const LogStatistics &stat, log_id_t /* id */) const
std::string size = android::base::StringPrintf("%zu", getSizes());
std::string pruned = "";
size_t dropped = getDropped();
if (dropped) {
pruned = android::base::StringPrintf("%zu", dropped);
if (worstUidEnabledForLogid(id)) {
size_t totalDropped = 0;
for (LogStatistics::uidTable_t::const_iterator it = stat.uidTable[id].begin();
it != stat.uidTable[id].end(); ++it) {
totalDropped += it->second.getDropped();
}
size_t sizes = stat.sizes(id);
size_t totalSize = stat.sizesTotal(id);
size_t totalElements = stat.elementsTotal(id);
float totalVirtualSize = (float)sizes + (float)totalDropped * totalSize
/ totalElements;
size_t entrySize = getSizes();
float virtualEntrySize = entrySize;
int realPermille = virtualEntrySize * 1000.0 / sizes;
size_t dropped = getDropped();
if (dropped) {
pruned = android::base::StringPrintf("%zu", dropped);
virtualEntrySize += (float)dropped * totalSize / totalElements;
}
int virtualPermille = virtualEntrySize * 1000.0 / totalVirtualSize;
int permille = (realPermille - virtualPermille) * 1000L
/ (virtualPermille ?: 1);
if ((permille < -1) || (1 < permille)) {
std::string change;
const char *units = "%";
const char *prefix = (permille > 0) ? "+" : "";
if (permille > 999) {
permille = (permille + 1000) / 100; // Now tenths fold
units = "X";
prefix = "";
}
if ((-99 < permille) && (permille < 99)) {
change = android::base::StringPrintf("%s%d.%u%s",
prefix,
permille / 10,
((permille < 0) ? (-permille % 10) : (permille % 10)),
units);
} else {
change = android::base::StringPrintf("%s%d%s",
prefix,
(permille + 5) / 10, units);
}
ssize_t spaces = EntryBaseConstants::pruned_len
- 2 - pruned.length() - change.length();
if ((spaces <= 0) && pruned.length()) {
spaces = 1;
}
if (spaces > 0) {
change += android::base::StringPrintf("%*s", (int)spaces, "");
}
pruned = change + pruned;
}
}
return formatLine(name, size, pruned);

2
logd/LogStatistics.h
View File

@ -372,6 +372,8 @@ struct TagEntry : public EntryBase {
// Log Statistics
class LogStatistics {
friend UidEntry;
size_t mSizes[LOG_ID_MAX];
size_t mElements[LOG_ID_MAX];
size_t mDroppedElements[LOG_ID_MAX];