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Bug 808003 - Add a few telemetry probes to help tune tab zombification parameters. r=gcp, mfinkle

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This commit is contained in:
Kartikaya Gupta 2012-11-07 10:00:48 -05:00
parent ebecbf3dd0
commit 9ae84007cb
2 changed files with 28 additions and 2 deletions
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7
mobile/android/chrome/content/browser.js
View File

@ -7609,12 +7609,13 @@ var MemoryObserver = {
for (let i = 0; i < tabs.length; i++) {
if (tabs[i] != selected) {
this.zombify(tabs[i]);
Telemetry.addData("FENNEC_TAB_ZOMBIFIED", (Date.now() - tabs[i].lastTouchedAt) / 1000);
}
}
Telemetry.addData("FENNEC_LOWMEM_TAB_COUNT", tabs.length);
},
zombify: function(tab) {
dump("Zombifying tab at index [" + tab.id + "]");
let browser = tab.browser;
let data = browser.__SS_data;
let extra = browser.__SS_extdata;
@ -7771,8 +7772,10 @@ var Tabs = {
}
// if the tab was last touched more than browser.tabs.expireTime seconds ago,
// zombify it
if (lruTab && (Date.now() - lruTab.lastTouchedAt) > expireTimeMs) {
let tabAgeMs = Date.now() - lruTab.lastTouchedAt;
if (lruTab && tabAgeMs > expireTimeMs) {
MemoryObserver.zombify(lruTab);
Telemetry.addData("FENNEC_TAB_EXPIRED", tabAgeMs / 1000);
return true;
}
return false;

23
toolkit/components/telemetry/Histograms.json
View File

@ -2309,6 +2309,13 @@
"description": "Fennec: Time for the Awesomebar Top Sites query to return with no filter set (ms)",
"cpp_guard": "ANDROID"
},
"FENNEC_LOWMEM_TAB_COUNT": {
"kind": "exponential",
"high": 100,
"n_buckets": 30,
"description": "How many tabs were open when a low-memory event was received",
"cpp_guard": "ANDROID"
},
"FENNEC_RESTORING_ACTIVITY": {
"kind": "flag",
"description": "Fennec is starting up but the Gecko thread was still running",
@ -2344,6 +2351,22 @@
"description": "The way the GeckoApp was launched. (Normal, URL, Prefetch, Redirector)",
"cpp_guard": "ANDROID"
},
"FENNEC_TAB_EXPIRED": {
"kind": "exponential",
"low": 10,
"high": 604800,
"n_buckets": 20,
"description": "How long (in seconds) a tab was inactive before it was expired",
"cpp_guard": "ANDROID"
},
"FENNEC_TAB_ZOMBIFIED": {
"kind": "exponential",
"low": 10,
"high": 1000000,
"n_buckets": 20,
"description": "How long (in seconds) a tab was inactive when it was OOM-zombified",
"cpp_guard": "ANDROID"
},
"FENNEC_WAS_KILLED": {
"kind": "flag",
"description": "Killed, likely due to an OOM condition",