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authorBartosz Taudul <wolf@nereid.pl>2022-10-26 22:47:17 +0300
committerBartosz Taudul <wolf@nereid.pl>2022-10-26 22:47:17 +0300
commitd34af7166e7a91f9b1fab895daa20224a76b19e9 (patch)
tree4d8f39dbb2e908cd53fd6286b0da12dd87918dec /manual
parent3afe9a98cff377e755fefe369414a6de49abcfe0 (diff)
Remove graphical representation of instruction latencies.
Diffstat (limited to 'manual')
-rw-r--r--manual/tracy.tex2
1 files changed, 0 insertions, 2 deletions
diff --git a/manual/tracy.tex b/manual/tracy.tex
index 2471ea74..459dcc4c 100644
--- a/manual/tracy.tex
+++ b/manual/tracy.tex
@@ -3561,8 +3561,6 @@ If the listed assembly code targets x86 or x64 instruction set architectures, ho
Selection of the CPU microarchitecture can be performed using the \emph{\faMicrochip{}~\textmu{}arch} drop-down. Each architecture is accompanied by the name of an example CPU implementing it. If the current selection matches the microarchitecture on which the profiled application was running, the \faMicrochip{}~icon will be green\footnote{Comparing sampled instruction counts with microarchitectural details only makes sense when this selection is properly matched.}. Otherwise, it will be red\footnote{You can use this to gain insight into how the code \emph{may} behave on other processors.}. Clicking on the \faMicrochip{}~icon when it is red will reset the selected microarchitecture to the one the profiled application was running on.
-Enabling the \emph{\faTruckLoading{}~Latency} option will display a graphical representation of instruction latencies on the listing. The minimum latency of instruction is represented by a red bar, while the maximum latency is represented by a yellow bar.
-
Clicking on the \emph{\faFileImport{}~Save} button lets you write the disassembly listing to a file. You can then manually extract some critical loop kernel and pass it to a CPU simulator, such as \emph{LLVM Machine Code Analyzer} (\texttt{llvm-mca})\footnote{\url{https://llvm.org/docs/CommandGuide/llvm-mca.html}}, to see how the code is executed and if there are any pipeline bubbles. Consult the \texttt{llvm-mca} documentation for more details. Alternatively, you might click the \RMB{}~right mouse button on a jump arrow and save only the instructions within the jump range, using the \emph{\faFileImport{}~Save jump range} button.
\subparagraph{Instruction dependencies}