Hi, On Fri, Apr 6, 2012 at 10:58 AM, Attilio Rao <attilio_at_freebsd.org> wrote: > Il 05 aprile 2012 19:03, Arnaud Lacombe <lacombar_at_gmail.com> ha scritto: >> Hi folks, >> >> Over the past months, I ran on a couple of unused box the >> `hackbench'[HACKBENCH] benchmark used by the Linux folks for tracking >> down various kind of regression/improvement. `hackbench' is a >> scheduler + IPC test (socket xor pipe). It creates producers/consumers >> groups and let a variable quantity of small messages flow happily. >> Producers and consumers are either processes xor threads. >> >> Tested platforms were >> - Atom D510, Intel, (incomplete) >> - Core 2 Quad Q9560, Intel >> - Soekris net5501, AMD (incomplete) >> - Xeon E5645, Intel (incomplete) >> - Xeon E5620 (dual package), Intel >> - Xeon E5-1650 (pending completion) >> - Vortex86, DMP >> >> Tested kernel were: >> - FreeBSD 7.4-RELEASE >> - FreeBSD 8.2-RELEASE >> - FreeBSD 9.0-RC3 and FreeBSD 9.0-RELEASE >> - FreeBSD 10-CURRENT as of r231573 > > Which means you run 10-CURRENT with all the kernel debugging options > on and MALLOC_DEBUG on? > I already answered that question. Namely: << note: rule [I] is alleviated for -CURRENT kernels, which were built with the same alteration made to GENERIC during the CURRENT->RELEASE transition (ie. WITNESS and a couple of other option disabled). >> this translates into the following patch (for amd64): diff --git a/sys/amd64/conf/GENERIC b/sys/amd64/conf/GENERIC index 8db8e27..9d61f25 100644 --- a/sys/amd64/conf/GENERIC +++ b/sys/amd64/conf/GENERIC _at__at_ -67,20 +67,6 _at__at_ options MAC # TrustedBSD MAC Framework #options KDTRACE_HOOKS # Kernel DTrace hooks options INCLUDE_CONFIG_FILE # Include this file in kernel -# Debugging support. Always need this: -options KDB # Enable kernel debugger support. -# For minimum debugger support (stable branch) use: -#options KDB_TRACE # Print a stack trace for a panic. -# For full debugger support use this instead: -options DDB # Support DDB. -options GDB # Support remote GDB. -options DEADLKRES # Enable the deadlock resolver -options INVARIANTS # Enable calls of extra sanity checking -options INVARIANT_SUPPORT # Extra sanity checks of internal structures, required by INVARIANTS -options WITNESS # Enable checks to detect deadlocks and cycles -options WITNESS_SKIPSPIN # Don't run witness on spinlocks for speed -options MALLOC_DEBUG_MAXZONES=8 # Separate malloc(9) zones - Arnaud > Attilio > > > -- > Peace can only be achieved by understanding - A. EinsteinReceived on Fri Apr 06 2012 - 15:54:05 UTC
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