diff options
| author | Ankur Arora <ankur.a.arora@oracle.com> | 2025-09-17 08:24:08 -0700 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2025-09-19 12:43:26 -0300 |
| commit | 7b6837e63a091d15ea35974aae5ccf2605ad7047 (patch) | |
| tree | a5e27b2077bf840211b8b67129b8ceb39b282100 /tools/perf/Documentation | |
| parent | perf bench mem: Switch from zalloc() to mmap() (diff) | |
| download | linux-7b6837e63a091d15ea35974aae5ccf2605ad7047.tar.gz linux-7b6837e63a091d15ea35974aae5ccf2605ad7047.zip | |
perf bench mem: Allow mapping of hugepages
Page sizes that can be selected: 4KB, 2MB, 1GB.
Both the reservation and node from which hugepages are allocated
from are expected to be addressed by the user.
An example of page-size selection:
$ perf bench mem memset -s 4gb -p 2mb
# Running 'mem/memset' benchmark:
# function 'default' (Default memset() provided by glibc)
# Copying 4gb bytes ...
14.919194 GB/sec
# function 'x86-64-unrolled' (unrolled memset() in arch/x86/lib/memset_64.S)
# Copying 4gb bytes ...
11.514503 GB/sec
# function 'x86-64-stosq' (movsq-based memset() in arch/x86/lib/memset_64.S)
# Copying 4gb bytes ...
12.600568 GB/sec
Signed-off-by: Ankur Arora <ankur.a.arora@oracle.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Mateusz Guzik <mjguzik@gmail.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Raghavendra K T <raghavendra.kt@amd.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/Documentation')
| -rw-r--r-- | tools/perf/Documentation/perf-bench.txt | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/tools/perf/Documentation/perf-bench.txt b/tools/perf/Documentation/perf-bench.txt index 8331bd28b10e..04cdc31a0b0b 100644 --- a/tools/perf/Documentation/perf-bench.txt +++ b/tools/perf/Documentation/perf-bench.txt @@ -177,11 +177,16 @@ Suite for evaluating performance of simple memory copy in various ways. Options of *memcpy* ^^^^^^^^^^^^^^^^^^^ --l:: +-s:: --size:: Specify size of memory to copy (default: 1MB). Available units are B, KB, MB, GB and TB (case insensitive). +-p:: +--page:: +Specify page-size for mapping memory buffers (default: 4KB). +Available values are 4KB, 2MB, 1GB (case insensitive). + -f:: --function:: Specify function to copy (default: default). @@ -201,11 +206,16 @@ Suite for evaluating performance of simple memory set in various ways. Options of *memset* ^^^^^^^^^^^^^^^^^^^ --l:: +-s:: --size:: Specify size of memory to set (default: 1MB). Available units are B, KB, MB, GB and TB (case insensitive). +-p:: +--page:: +Specify page-size for mapping memory buffers (default: 4KB). +Available values are 4KB, 2MB, 1GB (case insensitive). + -f:: --function:: Specify function to set (default: default). |