--- Devdas Bhagat <[EMAIL PROTECTED]> wrote:

> If AS can handle more CPUs, then so can 9. Its 2.4 still.

AS is a commercial product from RedHat which has a higher degree of
patches backported from the 2.5 series than the usual 2.4 kernel
distributed with RedHat 9.0 Just because uname says it is 2.4.20 mean
that it has nothing patched from 2.5 series kernel.

I am pretty sure the kernel in RedHat 9.0 doesnt have the following
present in RedHat Advanced Server

# Asynchronous I/O support: Applications no longer need to pause after
issuing read I/Os until they are complete.
# Increased SMP granularity: Particularly in the SCSI I/O subsystem.
Permits increased I/O throughput in SMP systems with multiple I/O
adapters.
# SMP Scheduler enhancements: Support process-CPU affinity. Improves
performance by increasing the CPU cache hit-rate and greatly reducing
spinlock contention in SMP systems.
# Bounce Buffer Elimination: Drastically reduces I/O-related memory
copy operations in large memory systems (>1GB memory).



Mithun

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