linux-kernel - [PATCH 16/18] Hibernate: show the verification time for monitor performance

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Date:	Thu, 22 Aug 2013 19:01:55 +0800
From:	"Lee, Chun-Yi" <joeyli.kernel@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	linux-security-module@...r.kernel.org, linux-efi@...r.kernel.org,
	linux-pm@...r.kernel.org, linux-crypto@...r.kernel.org,
	opensuse-kernel@...nsuse.org, David Howells <dhowells@...hat.com>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Matthew Garrett <mjg59@...f.ucam.org>,
	Len Brown <len.brown@...el.com>, Pavel Machek <pavel@....cz>,
	Josh Boyer <jwboyer@...hat.com>,
	Vojtech Pavlik <vojtech@...e.cz>,
	Matt Fleming <matt.fleming@...el.com>,
	James Bottomley <james.bottomley@...senpartnership.com>,
	Greg KH <gregkh@...uxfoundation.org>, JKosina@...e.com,
	Rusty Russell <rusty@...tcorp.com.au>,
	Herbert Xu <herbert@...dor.apana.org.au>,
	"David S. Miller" <davem@...emloft.net>,
	"H. Peter Anvin" <hpa@...or.com>, Michal Marek <mmarek@...e.cz>,
	Gary Lin <GLin@...e.com>, Vivek Goyal <vgoyal@...hat.com>,
	"Lee, Chun-Yi" <jlee@...e.com>
Subject: [PATCH 16/18] Hibernate: show the verification time for monitor performance

Show the verification time for monitor the performance of SHA256 and RSA
verification.

Reviewed-by: Jiri Kosina <jkosina@...e.cz>
Signed-off-by: Lee, Chun-Yi <jlee@...e.com>
---
 kernel/power/snapshot.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/kernel/power/snapshot.c b/kernel/power/snapshot.c
index 36c7157..b9c6a8a 100644
--- a/kernel/power/snapshot.c
+++ b/kernel/power/snapshot.c
@@ -2536,6 +2536,8 @@ error_mpi:
 
 int snapshot_image_verify(void)
 {
+	struct timeval start;
+	struct timeval stop;
 	struct crypto_shash *tfm;
 	struct shash_desc *desc;
 	u8 *digest;
@@ -2563,6 +2565,8 @@ int snapshot_image_verify(void)
 	desc->tfm = tfm;
 	desc->flags = CRYPTO_TFM_REQ_MAY_SLEEP;
 
+	do_gettimeofday(&start);
+
 	ret = crypto_shash_init(desc);
 	if (ret < 0)
 		goto error_shash;
@@ -2581,6 +2585,9 @@ int snapshot_image_verify(void)
 	if (ret)
 		goto error_verify;
 
+	do_gettimeofday(&stop);
+	swsusp_show_speed(&start, &stop, nr_copy_pages, "Verified");
+
 	kfree(h_buf);
 	kfree(digest);
 	crypto_free_shash(tfm);
-- 
1.6.4.2

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