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-rw-r--r--tools/perf/Documentation/perf-c2c.txt31
1 files changed, 24 insertions, 7 deletions
diff --git a/tools/perf/Documentation/perf-c2c.txt b/tools/perf/Documentation/perf-c2c.txt
index 6f69173731aa..f1f7ae6b08d1 100644
--- a/tools/perf/Documentation/perf-c2c.txt
+++ b/tools/perf/Documentation/perf-c2c.txt
@@ -109,7 +109,9 @@ REPORT OPTIONS
-d::
--display::
- Switch to HITM type (rmt, lcl) to display and sort on. Total HITMs as default.
+ Switch to HITM type (rmt, lcl) or peer snooping type (peer) to display
+ and sort on. Total HITMs (tot) as default, except Arm64 uses peer mode
+ as default.
--stitch-lbr::
Show callgraph with stitched LBRs, which may have more complete
@@ -174,12 +176,18 @@ For each cacheline in the 1) list we display following data:
Cacheline
- cacheline address (hex number)
- Rmt/Lcl Hitm
+ Rmt/Lcl Hitm (Display with HITM types)
- cacheline percentage of all Remote/Local HITM accesses
- LLC Load Hitm - Total, LclHitm, RmtHitm
+ Peer Snoop (Display with peer type)
+ - cacheline percentage of all peer accesses
+
+ LLC Load Hitm - Total, LclHitm, RmtHitm (For display with HITM types)
- count of Total/Local/Remote load HITMs
+ Load Peer - Total, Local, Remote (For display with peer type)
+ - count of Total/Local/Remote load from peer cache or DRAM
+
Total records
- sum of all cachelines accesses
@@ -201,16 +209,21 @@ For each cacheline in the 1) list we display following data:
- count of LLC load accesses, includes LLC hits and LLC HITMs
RMT Load Hit - RmtHit, RmtHitm
- - count of remote load accesses, includes remote hits and remote HITMs
+ - count of remote load accesses, includes remote hits and remote HITMs;
+ on Arm neoverse cores, RmtHit is used to account remote accesses,
+ includes remote DRAM or any upward cache level in remote node
Load Dram - Lcl, Rmt
- count of local and remote DRAM accesses
For each offset in the 2) list we display following data:
- HITM - Rmt, Lcl
+ HITM - Rmt, Lcl (Display with HITM types)
- % of Remote/Local HITM accesses for given offset within cacheline
+ Peer Snoop - Rmt, Lcl (Display with peer type)
+ - % of Remote/Local peer accesses for given offset within cacheline
+
Store Refs - L1 Hit, L1 Miss, N/A
- % of store accesses that hit L1, missed L1 and N/A (no available) memory
level for given offset within cacheline
@@ -227,9 +240,12 @@ For each offset in the 2) list we display following data:
Code address
- code address responsible for the accesses
- cycles - rmt hitm, lcl hitm, load
+ cycles - rmt hitm, lcl hitm, load (Display with HITM types)
- sum of cycles for given accesses - Remote/Local HITM and generic load
+ cycles - rmt peer, lcl peer, load (Display with peer type)
+ - sum of cycles for given accesses - Remote/Local peer load and generic load
+
cpu cnt
- number of cpus that participated on the access
@@ -251,7 +267,8 @@ The 'Node' field displays nodes that accesses given cacheline
offset. Its output comes in 3 flavors:
- node IDs separated by ','
- node IDs with stats for each ID, in following format:
- Node{cpus %hitms %stores}
+ Node{cpus %hitms %stores} (Display with HITM types)
+ Node{cpus %peers %stores} (Display with peer type)
- node IDs with list of affected CPUs in following format:
Node{cpu list}