From: Mahmoud Mandour <[email protected]>
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 <[email protected]>
Signed-off-by: Alex Bennée <[email protected]>
Message-Id: <[email protected]>
---
docs/devel/tcg-plugins.rst | 20 ++++++++++++++++++--
1 file 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)
--
2.30.2
