RE: [Lse-tech] MCS Lock Implmentation

[BALBIR S. <bal...@wi...>]

| 
|The test routine goes something like this:
|
|#define TOT_LOCK_ACS 200000000
|
|static void test_mcslock(int num)
|{
|        int i;
|        mcsnode_t node;
|        unsigned int flags;
|        local_irq_save(flags);

(1)        cycb3[num] = get_cycles();
|        for (i=0; i< TOT_LOCK_ACS; i++) {
|                mcs_lock(&mcslock, &node);
|                mb();
|                mcs_unlock(&mcslock, &node);
|        }
(2)        cyca3[num] = get_cycles();
|        local_irq_restore(flags);
|}


Are u sure there is no overflow between (1) and (2)? Do the
threads call this routine from an IRQ context?

Balbir