Re: [perf-discuss] Poor download speeds with 2009.06

2009-08-03 Thread Roch Bourbonnais
Le 3 août 09 à 12:06, Scott N. a écrit : Pretty standard desktop type machine but I threw in an old 3Com-905TX NIC into because the onboard nvidia nic didn't work with Opensolaris 2009.06. My other machine is running Vista SP1 x32 and using onboard broadcom nic. Both PC's are on same netwo

Re: [perf-discuss] ZFS fragmentation with MySQL databases

2008-11-22 Thread Roch Bourbonnais
The 8K record is what optimises the transactional performance at the expense of file scan. Now you could revert to a 32K recordsize if you want a different tradeoff but also did you consider using snapshots and zfs send | zfs recv ? That will allow you to replicate the DB incrementally only c

Re: [perf-discuss] prefetch data for page fault

2007-09-24 Thread Roch Bourbonnais
Moreover, even if you'd find a way, wouldn't that save something < 1 usec of the 1 millisec pagefault ? A big contortion to get 0.1% improvement. I'm sure engineering time can be better spent. Le 24 sept. 07 à 20:55, [EMAIL PROTECTED] a écrit : >>My means is not prefetch the page but u

Re: [perf-discuss] Re: Re: maxphys and sd_max_xfer_size

2006-05-02 Thread Roch Bourbonnais - Performance Engineering
I would like to caution people about this conventional wisdom. For UFS the I/O size tunable like maxphys ended up as an important parameter to the write throttle algorithm. The bigger it was the less coupled the application would be to the storage and some important gains could come from that. Sa

Re: [perf-discuss] Is the following CAS(Compare and Swap ) function preserves atomicity?

2006-03-22 Thread Roch Bourbonnais - Performance Engineering
ified a problem with the CAS implementation used in Solaris ? -r ________ Roch BourbonnaisSun Microsystems, Icnc-Grenoble Senior Performance Analyst 180, Avenu

Re: [perf-discuss] segvn analysis

2006-01-24 Thread Roch Bourbonnais - Performance Engineering
Eric Lowe writes: > On Wed, Jan 25, 2006 at 03:04:55AM +1100, Brendan Gregg wrote: > | > | The way a freshly written file (as opposed to a freshly mounted file) > | changed the number of faults really threw me. Still haven't put my finger > | on why, but I suspect it's a cache placement poli

[perf-discuss] [Fwd: 5062435 cpu_X_system kstats should include interrupt time]

2005-09-08 Thread Roch Bourbonnais - Performance Engineering
In case I wasn't clear, given the current situation we definitively need this fix-in as soon as possible. +1 -r Roch BourbonnaisSun Microsystems, Icnc-Grenoble Senior Perfor

[perf-discuss] 5062435 cpu_X_system kstats should include interrupt time

2005-09-08 Thread Roch Bourbonnais - Performance Engineering
Codereview comment for P3 kernel/other cpu_X_system kstats should include interrupt time NITS: In machdep.c* we could make intracct[] as hrtime_t ? uint64_t intracct[NCMSTATES]; Otherwise all's well. -r ___ perf-discuss mailing l