[gem5-users] blocking causes

[Mahmood Naderan]

Hi,
I see some stats regarding block causes.
system.l2.blocked_cycles::no_mshrs   9584945079          # number of
cycles access was blocked
system.l2.blocked_cycles::no_targets       0         # number of
cycles access was blocked
system.l2.blocked::no_mshrs       1765905         # number of cycles
access was blocked
system.l2.blocked::no_targets           0          # number of cycles
access was blocked

With the descriptions and the source code, it is not very clear what
does "no_mshr" mean? Also in the code, I see

    void clearBlocked(BlockedCause cause)
    {
        uint8_t flag = 1 << cause;
        blocked &= ~flag;
        DPRINTF(Cache,"Unblocking for cause %d, mask=%d\n", cause, blocked);
        if (blocked == 0) {
            blocked_cycles[cause] += curTick() - blockedCycle;
            cpuSidePort->clearBlocked();
        }
    }

Here it seems that the cause is an *enum* variable, but there is no
description for that.
Any comment is appreciated.

-- 
Regards,
Mahmood
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