Firefox/Goals/2010Q1/IO Reduction: Difference between revisions

Firefox/Goals/2010Q1/IO Reduction (view source)

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-== > 50% reduction of main thread I/O ==
+== Pitch ==
-The idea of this goal is to reduce the amount of I/O calls we make on the main thread by at least 50% with the [[Firefox/Goals/2010Q1/IO Reduction Criteria|specified criteria]].  This criteria will likely evolve throughout the quarter as we try to better quantify our results.
+Reducing I/O operations on the main thread will remove potential points of hanging that users experience, providing a substantially better user experience to our users.  Removing at least 50% of our current I/O operations (as of January 1, 2010) from the main thread.
-With v1.1 of the criteria, this is a summary of the amount of IO operations:
+== Goals ==
-* write counts: 4084
+* Reduce at least 50% of the I/O operations on the main thread (read, write, fsync, fstat) based on a certain [[Firefox/Goals/2010Q1/IO Reduction Criteria|set of criteria]].
-* read counts: 1073
-* fsync counts: 49
+== Non-Goals ==
-* total count: 5206
+* Reduce the number of I/O operations that we do
 == Status ==
-<onlyinclude>Work in progress.  Cookie stuff should have a new patch up this week.  About 27% of the IO has been removed from mozilla-central (week of March 1)!</onlyinclude>
+* IN FLIGHT
+* Project Lead: sdwilsh
+* Project Members: Bjarne, mak, rflint, Unfocused
+* Cookie stuff should have a new patch up this week.  About 27% of the IO has been removed from mozilla-central.  See [[Firefox/Goals/2010Q1/IO Reduction#Timeline / Milestones|this table]] for more details
-== How to help ==
+== Timeline / Milestones ==
-Contact Shawn Wilsher (sdwilsh on irc, sdwilsh at mozilla dot com).  I'll try to get a buglist going shortly.
+Initial numbers from v1.1 of the criteria are:
+* write counts: 4084
-== Active/Landed Bugs  ==
+* read counts: 1073
+* fsync counts: 49
-These bugs represent work being done to reduce IO calls. The approximate percentage of I/O calls each bug should remove from the main thread is also listed.
+* total count: 5206
+These are the bugs of interest:
 {| border="1"
 |-
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 ! scope="col" | Owner
 ! scope="col" | Status
-! scope="col" | Reads
+! scope="col" | reads
-! scope="col" | Writes
+! scope="col" | writes
-! scope="col" | Fsyncs
+! scope="col" | fsyncs
+! scope="col" | fstats
 ! scope="col" | % I/O Responsible
 |-
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 | 1423
 | 3
+|
 | 27.3%
 |-
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 |
 | 1137
+|
 |
 | 21.8%
@@ Line 52: / Line 59: @@
 | 10
 | 111
+|
 |
 | 2.3%
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 | wip patch up; discussion ongoing
 | 75
+|
 |
 |
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 | ?
 | ?
+|
 |
 | ?
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 | ?
 |
+|
 | ?
 |-
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 | ?
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+|
 | ?
 |}
+== Delivery Requirements ==
+This work must be landed on mozilla-central by March 31, 2010.
+== Constraints ==
+None
+== Dependencies ==
+None
+== Testing ==
+Our normal automated testing should be sufficient here.  Numbers of calls are generated by [[Firefox/Goals/2010Q1/IO Reduction Criteria/sdwilsh-io.d|this DTrace script]].
+== Related Projects ==
+None