From: Hao Lee <haolee.swjtu@gmail.com>
To: paulmck@kernel.org
Cc: perfbook@vger.kernel.org
Subject: The answer of Quiz C.8 is not quite reasonable
Date: Thu, 14 Apr 2022 17:42:25 +0000 [thread overview]
Message-ID: <20220414174225.GA29861@haolee.io> (raw)
Hi,
At the beginning of C.3.3 we have supposed the cache line containing "a"
resides _only_ in _CPU1’s_ cache. I think this is why _CPU0_ has to send
a "_read_ invalidate message" to _retrieve_ the cache line and invalid
CPU1's cache line.
However, the answer says the reason is the cache line in question
contains more than just the variable a. I can't understand the logical
relationship between this answer and the question. Am I missing
something here? Thanks.
Regards,
Hao Lee
next reply other threads:[~2022-04-14 17:42 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-14 17:42 Hao Lee [this message]
2022-04-17 17:44 ` The answer of Quiz C.8 is not quite reasonable Paul E. McKenney
2022-04-18 8:01 ` Hao Lee
2022-04-19 17:28 ` Paul E. McKenney
2022-04-20 6:45 ` Hao Lee
2022-04-20 18:15 ` Paul E. McKenney
2022-04-21 13:34 ` Hao Lee
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