I modified the code in s_lock.c to remove the spins
#define SPINS_PER_DELAY 1
and it doesn't exhibit the behaviour
This effectively changes the code to
while(TAS(lock))
select(10000); // 10ms
Can anyone explain why executing TAS 100 times would increase context
switches ?
Dave
On Tue, 2004-04-20 at 12:59, Josh Berkus wrote:
> Anjan,
>
> > Quad 2.0GHz XEON with highest load we have seen on the applications, DB
> > performing great -
>
> Can you run Tom's test? It takes a particular pattern of data access to
> reproduce the issue.
--
Dave Cramer
519 939 0336
ICQ # 14675561