Messages in this thread Patch in this message | | | From | Adrian Hunter <> | Subject | [PATCH V5 09/16] perf tools: Allow auxtrace data alignment | Date | Fri, 22 May 2015 14:54:06 +0300 |
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Allow auxtrace data to be a multiple of something other than page size. That is needed for BTS where the buffer contains 24-byte records.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> --- tools/perf/util/auxtrace.c | 7 +++++++ tools/perf/util/auxtrace.h | 1 + 2 files changed, 8 insertions(+)
diff --git a/tools/perf/util/auxtrace.c b/tools/perf/util/auxtrace.c index 8b7d59a..2d57759 100644 --- a/tools/perf/util/auxtrace.c +++ b/tools/perf/util/auxtrace.c @@ -1186,6 +1186,13 @@ static int __auxtrace_mmap__read(struct auxtrace_mmap *mm, data2 = NULL; } + if (itr->alignment) { + unsigned int unwanted = len1 % itr->alignment; + + len1 -= unwanted; + size -= unwanted; + } + /* padding must be written by fn() e.g. record__process_auxtrace() */ padding = size & 7; if (padding) diff --git a/tools/perf/util/auxtrace.h b/tools/perf/util/auxtrace.h index ed98743..7d12f33 100644 --- a/tools/perf/util/auxtrace.h +++ b/tools/perf/util/auxtrace.h @@ -304,6 +304,7 @@ struct auxtrace_record { const char *str); u64 (*reference)(struct auxtrace_record *itr); int (*read_finish)(struct auxtrace_record *itr, int idx); + unsigned int alignment; }; #ifdef HAVE_AUXTRACE_SUPPORT -- 1.9.1
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