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From: Jingyi Wang <wangjingyi11@huawei.com>
To: <drjones@redhat.com>, <kvm@vger.kernel.org>,
	<kvmarm@lists.cs.columbia.edu>
Cc: <maz@kernel.org>, <wanghaibin.wang@huawei.com>,
	<yuzenghui@huawei.com>, <eric.auger@redhat.com>,
	<wangjingyi11@huawei.com>, <prime.zeng@hisilicon.com>
Subject: [kvm-unit-tests PATCH v3 07/10] arm64: microbench: Add time limit for each individual test
Date: Fri, 31 Jul 2020 15:42:41 +0800
Message-ID: <20200731074244.20432-8-wangjingyi11@huawei.com> (raw)
In-Reply-To: <20200731074244.20432-1-wangjingyi11@huawei.com>

Besides using separate running times parameter, we add time limit
for loop_test to make sure each test should be done in a certain
time(5 sec here).

Signed-off-by: Jingyi Wang <wangjingyi11@huawei.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
---
 arm/micro-bench.c | 18 +++++++++++-------
 1 file changed, 11 insertions(+), 7 deletions(-)

diff --git a/arm/micro-bench.c b/arm/micro-bench.c
index 93bd855..09d9d53 100644
--- a/arm/micro-bench.c
+++ b/arm/micro-bench.c
@@ -22,6 +22,7 @@
 #include <asm/gic.h>
 #include <asm/gic-v3-its.h>
 
+#define NS_5_SECONDS (5 * 1000 * 1000 * 1000UL)
 static u32 cntfrq;
 
 static volatile bool irq_ready, irq_received;
@@ -267,23 +268,26 @@ static void loop_test(struct exit_test *test)
 	uint64_t start, end, total_ticks, ntimes = 0;
 	struct ns_time total_ns, avg_ns;
 
+	total_ticks = 0;
 	if (test->prep) {
 		if(!test->prep()) {
 			printf("%s test skipped\n", test->name);
 			return;
 		}
 	}
-	isb();
-	start = read_sysreg(cntpct_el0);
-	while (ntimes < test->times) {
+
+	while (ntimes < test->times && total_ns.ns < NS_5_SECONDS) {
+		isb();
+		start = read_sysreg(cntpct_el0);
 		test->exec();
+		isb();
+		end = read_sysreg(cntpct_el0);
+
 		ntimes++;
+		total_ticks += (end - start);
+		ticks_to_ns_time(total_ticks, &total_ns);
 	}
-	isb();
-	end = read_sysreg(cntpct_el0);
 
-	total_ticks = end - start;
-	ticks_to_ns_time(total_ticks, &total_ns);
 	avg_ns.ns = total_ns.ns / ntimes;
 	avg_ns.ns_frac = total_ns.ns_frac / ntimes;
 
-- 
2.19.1



  parent reply index

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-31  7:42 [kvm-unit-tests PATCH v3 00/10] arm/arm64: Add IPI/LPI/vtimer latency test Jingyi Wang
2020-07-31  7:42 ` [kvm-unit-tests PATCH v3 01/10] arm64: microbench: get correct ipi received num Jingyi Wang
2020-07-31  7:42 ` [kvm-unit-tests PATCH v3 02/10] arm64: microbench: Generalize ipi test names Jingyi Wang
2020-07-31  7:42 ` [kvm-unit-tests PATCH v3 03/10] arm64: microbench: gic: Add ipi latency test for gicv4.1 support kvm Jingyi Wang
2020-07-31  7:42 ` [kvm-unit-tests PATCH v3 04/10] arm64: its: Handle its command queue wrapping Jingyi Wang
2020-07-31  7:42 ` [kvm-unit-tests PATCH v3 05/10] arm64: microbench: its: Add LPI latency test Jingyi Wang
2020-07-31  7:42 ` [kvm-unit-tests PATCH v3 06/10] arm64: microbench: Allow each test to specify its running times Jingyi Wang
2020-07-31  7:42 ` Jingyi Wang [this message]
2020-08-01 16:13   ` [kvm-unit-tests PATCH v3 07/10] arm64: microbench: Add time limit for each individual test Andrew Jones
2020-07-31  7:42 ` [kvm-unit-tests PATCH v3 08/10] arm64: microbench: Add vtimer latency test Jingyi Wang
2020-08-01 16:22   ` Andrew Jones
2020-07-31  7:42 ` [kvm-unit-tests PATCH v3 09/10] arm64: microbench: Add test->post() to further process test results Jingyi Wang
2020-08-01 17:03   ` Andrew Jones
2020-07-31  7:42 ` [kvm-unit-tests PATCH v3 10/10] arm64: microbench: Add timer_post() to get actual PPI latency Jingyi Wang
2020-07-31 12:01 ` [kvm-unit-tests PATCH v3 00/10] arm/arm64: Add IPI/LPI/vtimer latency test Andrew Jones
2020-08-03  2:15   ` Jingyi Wang
2020-08-01 17:40 ` Andrew Jones
2020-08-05 11:54 ` Jingyi Wang
2020-08-05 12:13   ` Marc Zyngier
2020-08-11  1:48     ` Jingyi Wang
2020-08-11  7:49       ` Marc Zyngier
2020-08-17  1:46         ` Jingyi Wang
2020-08-17  8:26           ` Marc Zyngier

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