diff options
Diffstat (limited to 'chrome/browser/net')
| -rw-r--r-- | chrome/browser/net/dns_host_info.cc | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/chrome/browser/net/dns_host_info.cc b/chrome/browser/net/dns_host_info.cc index 8946f7f..45e088b 100644 --- a/chrome/browser/net/dns_host_info.cc +++ b/chrome/browser/net/dns_host_info.cc @@ -9,6 +9,7 @@ #include <algorithm> #include <string> +#include "base/field_trial.h" #include "base/format_macros.h" #include "base/histogram.h" #include "base/logging.h" @@ -120,7 +121,18 @@ void DnsHostInfo::SetFoundState() { state_ = FOUND; resolve_duration_ = GetDuration(); if (kMaxNonNetworkDnsLookupDuration <= resolve_duration_) { - UMA_HISTOGRAM_LONG_TIMES("DNS.PrefetchFoundNameL", resolve_duration_); + UMA_HISTOGRAM_CUSTOM_TIMES("DNS.PrefetchResolution", resolve_duration_, + kMaxNonNetworkDnsLookupDuration, TimeDelta::FromMinutes(15), 100); + + static bool use_ipv6_histogram(FieldTrialList::Find("IPv6_Probe") && + !FieldTrialList::Find("IPv6_Probe")->group_name().empty()); + if (use_ipv6_histogram) { + UMA_HISTOGRAM_CUSTOM_TIMES( + FieldTrial::MakeName("DNS.PrefetchResolution", "IPv6_Probe"), + resolve_duration_, kMaxNonNetworkDnsLookupDuration, + TimeDelta::FromMinutes(15), 100); + } + // Record potential beneficial time, and maybe we'll get a cache hit. // We keep the maximum, as the warming we did earlier may still be // helping with a cache upstream in DNS resolution. |