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| author | Kajol Jain <kjain@linux.ibm.com> | 2021-10-06 17:06:52 +0300 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2021-10-19 18:27:00 +0300 |
| commit | fec9cc6175d0ec1e13efe12be491d9bd4de62f80 (patch) | |
| tree | 9b8a67ded05627d043b97f879a78fa6ffd7e21c9 /fs/nilfs2/segment.h | |
| parent | f4c6217f7f5936f7173d028559ff5d25cce10816 (diff) | |
| download | linux-fec9cc6175d0ec1e13efe12be491d9bd4de62f80.tar.xz | |
perf: Add mem_hops field in perf_mem_data_src structure
Going forward, future generation systems can have more hierarchy
within the node/package level but currently we don't have any data source
encoding field in perf, which can be used to represent this level of data.
Add a new field called 'mem_hops' in the perf_mem_data_src structure
which can be used to represent intra-node/package or inter-node/off-package
details. This field is of size 3 bits where PERF_MEM_HOPS_{NA, 0..6} value
can be used to present different hop levels data.
Also add corresponding macros to define mem_hop field values
and shift value.
Currently we define macro for HOPS_0 which corresponds
to data coming from another core but same node.
For ex: Encodings for mem_hops fields with L2 cache:
L2 - local L2
L2 | REMOTE | HOPS_0 - remote core, same node L2
Signed-off-by: Kajol Jain <kjain@linux.ibm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20211006140654.298352-3-kjain@linux.ibm.com
Diffstat (limited to 'fs/nilfs2/segment.h')
0 files changed, 0 insertions, 0 deletions