Closed
Bug 1028260
Opened 10 years ago
Closed 10 years ago
Preallocated process takes more memory in FFOS 2.0
Categories
(Firefox OS Graveyard :: Performance, defect, P1)
Tracking
(blocking-b2g:2.0+)
People
(Reporter: tkundu, Unassigned)
References
Details
(Keywords: memory-footprint, perf, regression, Whiteboard: [c=memory p= s= u=2.0] [MemShrink:P2])
Attachments
(2 files)
Preallocated process shows 5837KB PSS and 4620KB USS in |b2g-procrank| on FFOS v1.3 But it shows 6563KB PSS and 5548 KB USS in |b2g-procrank| on FFOS v2.0 It seems like memory regression is almost 1MB in FFOS 2.0. It can become a bottleneck for 256MB FFOS 2.0 device.
Reporter | ||
Updated•10 years ago
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blocking-b2g: --- → 2.0?
Updated•10 years ago
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Component: General → Performance
Updated•10 years ago
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blocking-b2g: 2.0? → 2.0+
Keywords: footprint
Whiteboard: [c=memory p= s= u=] → [c=memory p= s= u=] [MemShrink]
Updated•10 years ago
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Keywords: regression
Comment 1•10 years ago
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I'll update with detailed memory reports for 1.3, 1.4, 2.0.
Flags: needinfo?(erahm)
Comment 2•10 years ago
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NAME PID PPID CPU(s) NICE USS PSS RSS VSIZE OOM_ADJ USER Preallocated 1.3 19834 937 1.6 18 4.2 5.7 17.5 59.7 10 root Preallocated 1.4 1023 835 0.6 18 4.8 8.5 17.3 59.2 10 u0_a1023 Preallocated 2.0 1079 842 0.6 18 5.2 7.1 18.2 60.8 1 u0_a1079 Preallocated 2.1 1083 834 0.6 18 5.4 7.4 18.5 60.4 1 u0_a1083 Looks like the primary regression is from 1.4 -> 2.0 (+1.1MB RSS), then 2.0 -> 2.1 (+0.3MB RSS). I'm not seeing anything jump out in an about:memory diff of 1.4->2.0. We do see heap-unclassified has increased the most, but the total explicit delta is about 0.7MB less than the observed increase: 0.38 MB (100.0%) -- explicit ├──0.62 MB (164.55%) ── heap-unclassified ├──-0.01 MB (-3.67%) ++ heap-overhead ├──-0.13 MB (-32.99%) ── xpti-working-set ├──-0.05 MB (-14.50%) ++ js-non-window ├──-0.04 MB (-11.36%) ++ window-objects/top(about:blank, id=1) ├──-0.03 MB (-8.54%) ++ xpconnect ├──0.02 MB (04.19%) ── layout/style-sheet-cache ├──0.01 MB (02.09%) ── preferences └──0.00 MB (00.21%) ++ (4 tiny) 0.42 MB ── heap-allocated -0.17 MB ── heap-committed -12.75% ── heap-overhead-ratio 0.02 MB ── js-main-runtime-temporary-peak -274 ── page-faults-soft 1.24 MB ── resident 0.36 MB ── resident-unique 1.57 MB ── vsize And 2.0 -> 2.1 is equally confusing (here heap-unclassified is down 1.2MB, but that could be due to better reporting): -1.09 MB (100.0%) -- explicit ├──-1.12 MB (102.66%) ── heap-unclassified ├──-0.01 MB (01.24%) ++ js-non-window ├───0.02 MB (-1.72%) ++ heap-overhead ├───0.02 MB (-1.43%) ── xpti-working-set └───0.01 MB (-0.75%) ++ (8 tiny) -1.15 MB ── heap-allocated -2 ── heap-chunks -1.19 MB ── heap-committed -2.00 MB ── heap-mapped 3.44% ── heap-overhead-ratio 0.04 MB ── js-main-runtime-temporary-peak 213 ── page-faults-soft -0.09 MB ── resident 0.20 MB ── resident-unique -0.39 MB ── vsize
Flags: needinfo?(erahm)
Comment 3•10 years ago
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get_about_memory.py results for pvt eng builds of the latest 1.3, 1.4, 2.0 (aurora), 2.1 (central). Exact gecko/gaia versions are including in each folder as b2g-version
Updated•10 years ago
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Whiteboard: [c=memory p= s= u=] [MemShrink] → [c=memory p= s= u=] [MemShrink:P2]
The memory consumed by the Nuwa process appears to have decreased, so it's possible we just "moved" memory from one process to the other. I'm far more concerned about bug 1029902 than this.
Updated•10 years ago
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Severity: normal → blocker
Whiteboard: [c=memory p= s= u=] [MemShrink:P2] → [c=memory p= s= u=2.0] [MemShrink:P2]
Comment 5•10 years ago
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Eric, Can you take this one? Kyle's occupied with bug 1029902 and we need help with resolving Memory performance issues. Thanks, FxOS Perf Triage
Flags: needinfo?(erahm)
Comment 6•10 years ago
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From IRC it appears the memory reports in comment 3 did not use the -m flag for minification. Given that the flame has so much memory these were taken without any memory pressure. So changes could just reflect temporary stuff that would be flushed when pressure occurs. I would recommend checking with the -m flag. Tapas, how much memory does the device your testing on have? Did you force memory minification with -m?
Flags: needinfo?(tkundu)
Comment 7•10 years ago
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> minification
FWIW, your use of this term totally confused me. I thought you were talking about minification of source code, i.e. rewriting it to take less space. I think "minimization" is less confusing :)
Reporter | ||
Comment 8•10 years ago
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(In reply to Ben Kelly [:bkelly] from comment #6) > From IRC it appears the memory reports in comment 3 did not use the -m flag > for minification. Given that the flame has so much memory these were taken > without any memory pressure. So changes could just reflect temporary stuff > that would be flushed when pressure occurs. > > I would recommend checking with the -m flag. > > Tapas, how much memory does the device your testing on have? Did you force > memory minification with -m? I attached it here. I used |adb reboot && sleep 60| in both FFOS v1.3 and FFOS v2.0 and I also used command [1] to get this report on both platform. It shows me almost 1MB regression between v2.0 and v1.3 . [1] |MOZ_IGNORE_NUWA_PROCESS=1 ./device/qcom/b2g_common/mozilla-b2g/tools/get_about_memory.py --minimize --gecko-objdir=./out/target/product/msm8610/obj/objdir-gecko/|
Flags: needinfo?(tkundu)
Comment 9•10 years ago
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Looks like Tapas and I are on the same hunt, I did my own measurements for 1.4, 2.0, 2.1. If we look at the whole picture including Nuwa's stats I think overall this is a non-issue. Nuwa RSS went down from 1.4 -> 2.1 by 1.25, Preallocated went up by 1.25. Nuwa USS went down by 1.5, Preallocated went up by 0.65. So overall things are _slightly_ better now if we combine Nuwa and Preallocated stats. It does look like there's a slight regression from 2.0 -> 2.1: combined RSS went up ~0.5 and combined USS went up 0.825. I'm inclined to close this as works for me, but can look into things further if needs be. Averages of 4 measurements after a reboot each time. Preallocated averages: USS PSS RSS VSIZE 1.4 - Preallocated 4.6 8.325 17.125 59.2 2.0 - Preallocated 4.6 7.325 17.625 60.8 2.1 - Preallocated 5.25 7.975 18.375 60.4 Preallocated average deltas: USS PSS RSS VSIZE 1.4 -> 2.0 0 -1 0.5 1.6 2.0 -> 2.1 0.65 0.65 0.75 -0.4 1.4 -> 2.1 0.65 -0.35 1.25 1.2 Nuwa averages: USS PSS RSS VSIZE 1.4 - Nuwa 3.9 9.425 20.95 52.2 2.0 - Nuwa 2.225 7.15 19.925 53.8 2.1 - Nuwa 2.4 7.125 19.7 53.4 Nuwa average deltas: USS PSS RSS VSIZE 1.4 -> 2.0 -1.675 -2.275 -1.025 1.6 2.0 -> 2.1 0.175 -0.025 -0.225 -0.4 1.4 -> 2.1 -1.5 -2.3 -1.25 1.2
Flags: needinfo?(erahm)
Comment 10•10 years ago
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Tapas, Per Eric's findings and recommendation in comment 9 we intend to close this as WFM. Please confirm your agreement or indicate why you disagree. Thanks
Flags: needinfo?(tkundu)
Reporter | ||
Comment 11•10 years ago
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(In reply to Mike Lee [:mlee] from comment #10) > Tapas, > > Per Eric's findings and recommendation in comment 9 we intend to close this > as WFM. Please confirm your agreement or indicate why you disagree. > > Thanks Please close it. It seems to me very reasonable now.
Flags: needinfo?(tkundu)
Updated•10 years ago
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Status: NEW → RESOLVED
Closed: 10 years ago
Resolution: --- → WORKSFORME
Updated•10 years ago
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Target Milestone: --- → 2.0 S5 (4july)
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Description
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