[haiku-bugs] Re: [Haiku] #10454: New scheduler: substantial performance drop
- From: "stippi" <trac@xxxxxxxxxxxx>
- Date: Tue, 04 Feb 2014 09:04:00 -0000
#10454: New scheduler: substantial performance drop
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Reporter: stippi | Owner: pdziepak
Type: task | Status: in-progress
Priority: high | Milestone: R1
Component: System/Kernel | Version: R1/Development
Resolution: | Keywords:
Blocked By: 10487 | Blocking:
Has a Patch: 0 | Platform: All
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Comment (by stippi):
I am almost convinced this has nothing to do with thread migration. First
of all, it was news to me that the observed behavior is apparently
hardware-specific, for other people it works just fine and the new
scheduler is faster, some are in the same boat as me. Secondly, I am
observing "short freezes", which I now think may be related: I mostly
notice that while typing in Pe, sometimes the text caret does not react,
and then several chars that I just typed in the last second or two appear
at once... so somewhere, sometimes a delay happens that prevents threads
from running when they should. Maybe the delay is always there but varies
in length, with the average length having the observed effect on overall
compile time, and the longest length giving a noticeable delay while
typing.
My hardware is a Core i5 quad:
Intel(R) Core(TM) i5-3570 CPU @ 3.40GHz
family(6) model(58) stepping(9)
fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36
clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx rdtscp lm constant_tsc
arch_perfmon pebs bts xtopology nonstop_tsc aperfmperf pni pclmulqdq
dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm pcid sse4_1
sse4_2 x2apic popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm
ida arat epb xsaveopt pln pts dtherm tpr_shadow vnmi flexpriority ept vpid
fsgsbase smep erms
Anything else I should follow up on to help investigate?
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Ticket URL: <https://dev.haiku-os.org/ticket/10454#comment:8>
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