lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Fri, 8 Dec 2017 21:13:44 +0800 From: Jin Yao <yao.jin@...ux.intel.com> To: acme@...nel.org, jolsa@...nel.org, peterz@...radead.org, mingo@...hat.com, alexander.shishkin@...ux.intel.com Cc: Linux-kernel@...r.kernel.org, ak@...ux.intel.com, kan.liang@...el.com, yao.jin@...el.com, Jin Yao <yao.jin@...ux.intel.com> Subject: [PATCH v7 4/6] perf util: Create function to perform multiple time range checking Previous patch supports the multiple time range. For example, select the first and second 10% time slices. perf report --time 10%/1,10%/2 We need a function to check if a timestamp is in the ranges of [0, 10%) and [10%, 20%]. Note that it includes the last element in [10%, 20%] but it doesn't include the last element in [0, 10%). It's to avoid the overlap. This patch implments a new function perf_time__ranges_skip_sample for this checking. Change log: ----------- v4: Let perf_time__ranges_skip_sample be compatible with perf_time__skip_sample when only one time range. Signed-off-by: Jin Yao <yao.jin@...ux.intel.com> --- tools/perf/util/time-utils.c | 28 ++++++++++++++++++++++++++++ tools/perf/util/time-utils.h | 3 +++ 2 files changed, 31 insertions(+) diff --git a/tools/perf/util/time-utils.c b/tools/perf/util/time-utils.c index 61c46022..3f7f18f 100644 --- a/tools/perf/util/time-utils.c +++ b/tools/perf/util/time-utils.c @@ -300,6 +300,34 @@ bool perf_time__skip_sample(struct perf_time_interval *ptime, u64 timestamp) return false; } +bool perf_time__ranges_skip_sample(struct perf_time_interval *ptime_buf, + int num, u64 timestamp) +{ + struct perf_time_interval *ptime; + int i; + + if ((timestamp == 0) || (num == 0)) + return false; + + if (num == 1) + return perf_time__skip_sample(&ptime_buf[0], timestamp); + + /* + * start/end of multiple time ranges must be valid. + */ + for (i = 0; i < num; i++) { + ptime = &ptime_buf[i]; + + if (timestamp >= ptime->start && + ((timestamp < ptime->end && i < num - 1) || + (timestamp <= ptime->end && i == num - 1))) { + break; + } + } + + return (i == num) ? true : false; +} + int timestamp__scnprintf_usec(u64 timestamp, char *buf, size_t sz) { u64 sec = timestamp / NSEC_PER_SEC; diff --git a/tools/perf/util/time-utils.h b/tools/perf/util/time-utils.h index 2308723..34d5eba 100644 --- a/tools/perf/util/time-utils.h +++ b/tools/perf/util/time-utils.h @@ -18,6 +18,9 @@ int perf_time__percent_parse_str(struct perf_time_interval *ptime_buf, int num, bool perf_time__skip_sample(struct perf_time_interval *ptime, u64 timestamp); +bool perf_time__ranges_skip_sample(struct perf_time_interval *ptime_buf, + int num, u64 timestamp); + int timestamp__scnprintf_usec(u64 timestamp, char *buf, size_t sz); int fetch_current_timestamp(char *buf, size_t sz); -- 2.7.4
Powered by blists - more mailing lists