From patchwork Fri Sep 21 13:45:38 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yordan Karadzhov X-Patchwork-Id: 10759367 Return-Path: Received: from mail-sn1nam02on0058.outbound.protection.outlook.com ([104.47.36.58]:21536 "EHLO NAM02-SN1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1728098AbeIUTfX (ORCPT ); Fri, 21 Sep 2018 15:35:23 -0400 From: Yordan Karadzhov To: rostedt@goodmis.org Cc: linux-trace-devel@vger.kernel.org, "Yordan Karadzhov (VMware)" Subject: [PATCH 2/4] kernel-shark-qt: Add kshark_convert_nano() function Date: Fri, 21 Sep 2018 16:45:38 +0300 Message-Id: <20180921134540.13074-3-ykaradzhov@vmware.com> In-Reply-To: <20180921134540.13074-1-ykaradzhov@vmware.com> References: <20180921134540.13074-1-ykaradzhov@vmware.com> MIME-Version: 1.0 Sender: linux-trace-devel-owner@vger.kernel.org List-ID: Content-Length: 1898 From: "Yordan Karadzhov (VMware)" kshark_convert_nano() is used to convert the original value of the timestamp of the trace records (having nanosecond precision) into two values representing the time in seconds and milliseconds. Signed-off-by: Yordan Karadzhov (VMware) --- kernel-shark-qt/src/libkshark.c | 14 ++++++++++++++ kernel-shark-qt/src/libkshark.h | 2 ++ 2 files changed, 16 insertions(+) diff --git a/kernel-shark-qt/src/libkshark.c b/kernel-shark-qt/src/libkshark.c index 9ccb3cc..40625e5 100644 --- a/kernel-shark-qt/src/libkshark.c +++ b/kernel-shark-qt/src/libkshark.c @@ -1040,6 +1040,20 @@ const char *kshark_get_info_easy(struct kshark_entry *entry) return info; } +/** + * @brief Convert the timestamp of the trace record (nanosecond precision) into + * seconds and microseconds. + * + * @param time: Input location for the timestamp. + * @param sec: Output location for value of the seconds. + * @param usec: Output location for value of the microseconds. + */ +void kshark_convert_nano(uint64_t time, uint64_t *sec, uint64_t *usec) +{ + *sec = time / 1000000000ULL; + *usec = (time / 1000) % 1000000; +} + /** * @brief Dump into a string the content of one entry. The function allocates * a null terminated string and returns a pointer to this string. The diff --git a/kernel-shark-qt/src/libkshark.h b/kernel-shark-qt/src/libkshark.h index a1f294a..085b79c 100644 --- a/kernel-shark-qt/src/libkshark.h +++ b/kernel-shark-qt/src/libkshark.h @@ -158,6 +158,8 @@ const char *kshark_get_event_name_easy(struct kshark_entry *entry); const char *kshark_get_info_easy(struct kshark_entry *entry); +void kshark_convert_nano(uint64_t time, uint64_t *sec, uint64_t *usec); + char* kshark_dump_entry(const struct kshark_entry *entry); struct tep_record *kshark_read_at(struct kshark_context *kshark_ctx,