1384743 - about:performance process list is always empty

Status: RESOLVED WONTFIX

(Toolkit :: Performance Monitoring, defect)

Description

[Jan Beich]

Attachment: screenshot

resident-unique reporter isn't implemented in XPCOM on Tier3 platforms like BSDs or Solaris. Instead of leaving the field empty or showing 0 the whole list is aborted. Is this intentional?

$ firefox -new-instance -profile $(mktemp -d) mozilla.org about:performance
<Menu -> Tools -> Web Developer -> Browser Console (Ctrl+Shift+J)>
NS_ERROR_NOT_AVAILABLE: Component returned failure code: 0x80040111 (NS_ERROR_NOT_AVAILABLE) [nsIMemoryReporterManager.residentUnique]
Memory.jsm:68:    let uss = memMgr.residentUnique;

$ ps -o nlwp -lwwp $(pgrep firefox)
NLWP  UID   PID  PPID CPU PRI NI     VSZ    RSS MWCHAN STAT TT     TIME COMMAND
  53 1234 10287  9844   0  20  0 1585160 297624 select S+    6  0:09.86 firefox -new-instance -profile /tmp/tmp.QTDuBDRZ mozilla.org about:performance
  32 1234 10289 10287   0  20  0 1439600 147776 select S+    6  0:00.83 /usr/local/lib/firefox/firefox -contentproc -childID 1 -isForBrowser -intPrefs ... -stringPrefs ... -appdir /usr/local/lib/firefox/browser 10287 tab
  31 1234 10290 10287   0  20  0 1382452 123560 select S+    6  0:00.45 /usr/local/lib/firefox/firefox -contentproc -childID 2 -isForBrowser -intPrefs ... -stringPrefs ... -appdir /usr/local/lib/firefox/browser 10287 tab
  32 1234 10291 10287   0  20  0 1412344 122244 select S+    6  0:00.43 /usr/local/lib/firefox/firefox -contentproc -childID 3 -isForBrowser -intPrefs ... -stringPrefs ... -appdir /usr/local/lib/firefox/browser 10287 tab

$ procstat -v $(pgrep firefox)
  PID              START                END PRT  RES PRES REF SHD FLAG TP PATH
10291          0x1021000          0x102b000 r--   10   30  12   4 CN-- vn /usr/local/lib/firefox/firefox
10291          0x102b000          0x1046000 r-x   18   30  12   4 CN-- vn /usr/local/lib/firefox/firefox
10291          0x1046000          0x1047000 rw-    1    0   1   0 C--- vn /usr/local/lib/firefox/firefox
10291          0x1047000          0x1048000 r--    1    2   2   0 ---- df 
10291          0x1048000          0x1049000 rw-    1    2   2   0 ---- df 
10291        0x801046000        0x80106a000 r-x   29   30  56   0 CN-- vn /libexec/ld-elf.so.1
10291        0x80106a000        0x8010bb000 rw-   78  106   2   0 ---- df 
10291        0x8010bb000        0x8010c4000 rw-    7    7   1   0 ---- df 
10291        0x8010c4000        0x8010e0000 rw-   28  106   2   0 ---- df 
10291        0x8010e0000        0x8010e6000 r--    5    9  13   5 CN-- vn /usr/local/lib/firefox/liblgpllibs.so
10291        0x8010e6000        0x8010ef000 r-x    2    9  13   5 CN-- vn /usr/local/lib/firefox/liblgpllibs.so
10291        0x8010ef000        0x8010f0000 rw-    1    0   2   0 C--- vn /usr/local/lib/firefox/liblgpllibs.so
10291        0x8010f0000        0x8010f1000 r--    1    0   2   0 C--- vn /usr/local/lib/firefox/liblgpllibs.so
10291        0x8010f1000        0x801191000 rw-    0    0   0   0 ---- -- 
...

http://searchfox.org/mozilla-central/rev/ad093e98f423/xpcom/base/nsMemoryReporterManager.cpp#2359

Comment 1

[Florian Quèze [:florian]]

about:performance is being redesigned; mass closing the bugs related to parts of the current about:performance page that we are not keeping.

Our goals with the redesign are to reduce the overhead caused by having the page opened, increase the reliability of the displayed information, and make the offered information actionable for most users. The back-end work is being tracked in bug 1419681.