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Diffstat (limited to 'docs')
| -rw-r--r-- | docs/devel/tcg-plugins.rst | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/docs/devel/tcg-plugins.rst b/docs/devel/tcg-plugins.rst index 0568dfa..39ce86e 100644 --- a/docs/devel/tcg-plugins.rst +++ b/docs/devel/tcg-plugins.rst @@ -280,3 +280,37 @@ which will eventually report:: previously @ 0x000000ffd08098/5 (809900593 insns) previously @ 0x000000ffd080c0/1 (809900588 insns) +- contrib/plugins/hwprofile + +The hwprofile tool can only be used with system emulation and allows +the user to see what hardware is accessed how often. It has a number of options: + + * arg=read or arg=write + + By default the plugin tracks both reads and writes. You can use one + of these options to limit the tracking to just one class of accesses. + + * arg=source + + Will include a detailed break down of what the guest PC that made the + access was. Not compatible with arg=pattern. Example output:: + + cirrus-low-memory @ 0xfffffd00000a0000 + pc:fffffc0000005cdc, 1, 256 + pc:fffffc0000005ce8, 1, 256 + pc:fffffc0000005cec, 1, 256 + + * arg=pattern + + Instead break down the accesses based on the offset into the HW + region. This can be useful for seeing the most used registers of a + device. Example output:: + + pci0-conf @ 0xfffffd01fe000000 + off:00000004, 1, 1 + off:00000010, 1, 3 + off:00000014, 1, 3 + off:00000018, 1, 2 + off:0000001c, 1, 2 + off:00000020, 1, 2 + ... |