diff options
| author | Mahmoud Mandour <ma.mandourr@gmail.com> | 2021-10-26 11:22:23 +0100 |
|---|---|---|
| committer | Alex Bennée <alex.bennee@linaro.org> | 2021-11-04 10:32:01 +0000 |
| commit | b8312e04c8116b7787c54eb6c3cfee712b74f2f3 (patch) | |
| tree | 54971ca1c4bda6afd5969558c18c1556e0213a74 /docs | |
| parent | 447f935674214dd4e449cc4a27711489779cd1ff (diff) | |
docs/tcg-plugins: add L2 arguments to cache docs
cache plugin now allows optional L2 per-core cache emulation that can be
configured through plugin arguments, this commit adds this functionality
to the docs.
While I'm at it, I editted the bullet point for cache plugin to say:
contrib/plugins/cache.c
instead of
contrib/plugins/cache
to match other plugins.
Signed-off-by: Mahmoud Mandour <ma.mandourr@gmail.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20210810134844.166490-6-ma.mandourr@gmail.com>
Message-Id: <20211026102234.3961636-18-alex.bennee@linaro.org>
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/devel/tcg-plugins.rst | 20 |
1 files changed, 18 insertions, 2 deletions
diff --git a/docs/devel/tcg-plugins.rst b/docs/devel/tcg-plugins.rst index 842ae01a4c..59a7d838be 100644 --- a/docs/devel/tcg-plugins.rst +++ b/docs/devel/tcg-plugins.rst @@ -361,8 +361,9 @@ which will output an execution trace following this structure:: - contrib/plugins/cache.c -Cache modelling plugin that measures the performance of a given cache -configuration when a given working set is run:: +Cache modelling plugin that measures the performance of a given L1 cache +configuration, and optionally a unified L2 per-core cache when a given working +set is run:: qemu-x86_64 -plugin ./contrib/plugins/libcache.so \ -d plugin -D cache.log ./tests/tcg/x86_64-linux-user/float_convs @@ -420,3 +421,18 @@ The plugin has a number of arguments, all of them are optional: Sets the number of cores for which we maintain separate icache and dcache. (default: for linux-user, N = 1, for full system emulation: N = cores available to guest) + + * l2=on + + Simulates a unified L2 cache (stores blocks for both instructions and data) + using the default L2 configuration (cache size = 2MB, associativity = 16-way, + block size = 64B). + + * l2cachesize=N + * l2blksize=B + * l2assoc=A + + L2 cache configuration arguments. They specify the cache size, block size, and + associativity of the L2 cache, respectively. Setting any of the L2 + configuration arguments implies ``l2=on``. + (default: N = 2097152 (2MB), B = 64, A = 16) |