From cf7905165fee15fe26ac4a91ee0a35b966249430 Mon Sep 17 00:00:00 2001 From: Alexey Budankov Date: Tue, 9 Oct 2018 17:36:24 +0300 Subject: perf record: Encode -k clockid frequency into Perf trace Store -k clockid frequency into Perf trace to enable timestamps derived metrics conversion into wall clock time on reporting stage. Below is the example of perf report output: tools/perf/perf record -k raw -- ../../matrix/linux/matrix.gcc ... [ perf record: Captured and wrote 31.222 MB perf.data (818054 samples) ] tools/perf/perf report --header # ======== ... # event : name = cycles:ppp, , size = 112, { sample_period, sample_freq } = 4000, sample_type = IP|TID|TIME|PERIOD, disabled = 1, inherit = 1, mmap = 1, comm = 1, freq = 1, enable_on_exec = 1, task = 1, precise_ip = 3, sample_id_all = 1, exclude_guest = 1, mmap2 = 1, comm_exec = 1, use_clockid = 1, clockid = 4 ... # clockid frequency: 1000 MHz ... # ======== Signed-off-by: Alexey Budankov Cc: Alexander Shishkin Cc: Andi Kleen Cc: Jiri Olsa Cc: Namhyung Kim Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/23a4a1dc-b160-85a0-347d-40a2ed6d007b@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/env.h | 1 + 1 file changed, 1 insertion(+) (limited to 'tools/perf/util/env.h') diff --git a/tools/perf/util/env.h b/tools/perf/util/env.h index 1f3ccc368530..d01b8355f4ca 100644 --- a/tools/perf/util/env.h +++ b/tools/perf/util/env.h @@ -63,6 +63,7 @@ struct perf_env { struct numa_node *numa_nodes; struct memory_node *memory_nodes; unsigned long long memory_bsize; + u64 clockid_res_ns; }; extern struct perf_env perf_env; -- cgit v1.2.3