From: Jingyi Wang <wangjingyi11@huawei.com> To: <drjones@redhat.com>, <kvm@vger.kernel.org>, <kvmarm@lists.cs.columbia.edu> Cc: maz@kernel.org, prime.zeng@hisilicon.com Subject: [kvm-unit-tests PATCH v3 10/10] arm64: microbench: Add timer_post() to get actual PPI latency Date: Fri, 31 Jul 2020 15:42:44 +0800 [thread overview] Message-ID: <20200731074244.20432-11-wangjingyi11@huawei.com> (raw) In-Reply-To: <20200731074244.20432-1-wangjingyi11@huawei.com> For we get the time duration of (10msec timer + injection latency) in timer_exec(), we substract the value of 10msec in timer_post() to get the actual latency. Signed-off-by: Jingyi Wang <wangjingyi11@huawei.com> --- arm/micro-bench.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-) diff --git a/arm/micro-bench.c b/arm/micro-bench.c index 4680ba4..315fc7c 100644 --- a/arm/micro-bench.c +++ b/arm/micro-bench.c @@ -254,6 +254,18 @@ static void timer_exec(void) assert_msg(irq_received, "failed to receive PPI in time, but received %d successfully\n", received); } +static void timer_post(uint64_t total_ticks, uint64_t ntimes, struct ns_time *total_ns) +{ + /* + * We use a 10msec timer to test the latency of PPI, + * so we substract the ticks of 10msec to get the + * actual latency + */ + + total_ticks -= ntimes * (cntfrq / 100); + ticks_to_ns_time(total_ticks, total_ns); +} + static void hvc_exec(void) { asm volatile("mov w0, #0x4b000000; hvc #0" ::: "w0"); @@ -302,7 +314,7 @@ static struct exit_test tests[] = { {"ipi", ipi_prep, ipi_exec, NULL, 65536, true}, {"ipi_hw", ipi_hw_prep, ipi_exec, NULL, 65536, true}, {"lpi", lpi_prep, lpi_exec, NULL, 65536, true}, - {"timer_10ms", timer_prep, timer_exec, NULL, 256, true}, + {"timer_10ms", timer_prep, timer_exec, timer_post, 256, true}, }; #define PS_PER_SEC (1000 * 1000 * 1000 * 1000UL) -- 2.19.1 _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
next prev parent reply other threads:[~2020-07-31 7:45 UTC|newest] 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 ` [kvm-unit-tests PATCH v3 07/10] arm64: microbench: Add time limit for each individual test Jingyi Wang 2020-08-01 16:13 ` 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 ` Jingyi Wang [this message] 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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