From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A1402C433E1 for ; Sun, 17 May 2020 10:11:32 +0000 (UTC) Received: from mm01.cs.columbia.edu (mm01.cs.columbia.edu [128.59.11.253]) by mail.kernel.org (Postfix) with ESMTP id 6553C207FB for ; Sun, 17 May 2020 10:11:32 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6553C207FB Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvmarm-bounces@lists.cs.columbia.edu Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 0EE224B10C; Sun, 17 May 2020 06:11:32 -0400 (EDT) X-Virus-Scanned: at lists.cs.columbia.edu Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id z-imhyyiMsKV; Sun, 17 May 2020 06:11:31 -0400 (EDT) Received: from mm01.cs.columbia.edu (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id E2DA54B11C; Sun, 17 May 2020 06:11:29 -0400 (EDT) Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 883434B0F6 for ; Sun, 17 May 2020 06:11:28 -0400 (EDT) X-Virus-Scanned: at lists.cs.columbia.edu Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id rC3OxismR5HN for ; Sun, 17 May 2020 06:11:27 -0400 (EDT) Received: from huawei.com (szxga05-in.huawei.com [45.249.212.191]) by mm01.cs.columbia.edu (Postfix) with ESMTPS id 522C54B0DA for ; Sun, 17 May 2020 06:11:27 -0400 (EDT) Received: from DGGEMS413-HUB.china.huawei.com (unknown [172.30.72.60]) by Forcepoint Email with ESMTP id 12990D04573930373B12; Sun, 17 May 2020 18:11:24 +0800 (CST) Received: from DESKTOP-FPN2511.china.huawei.com (10.173.222.58) by DGGEMS413-HUB.china.huawei.com (10.3.19.213) with Microsoft SMTP Server id 14.3.487.0; Sun, 17 May 2020 18:11:17 +0800 From: Jingyi Wang To: , , , Subject: [kvm-unit-tests PATCH 6/6] arm64: microbench: Add vtimer latency test Date: Sun, 17 May 2020 18:09:00 +0800 Message-ID: <20200517100900.30792-7-wangjingyi11@huawei.com> X-Mailer: git-send-email 2.14.1.windows.1 In-Reply-To: <20200517100900.30792-1-wangjingyi11@huawei.com> References: <20200517100900.30792-1-wangjingyi11@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.173.222.58] X-CFilter-Loop: Reflected Cc: maz@kernel.org X-BeenThere: kvmarm@lists.cs.columbia.edu X-Mailman-Version: 2.1.14 Precedence: list List-Id: Where KVM/ARM decisions are made List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu Triggers PPIs by setting up a 10msec timer and test the latency. For this test can be time consuming, 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 --- arm/micro-bench.c | 81 ++++++++++++++++++++++++++++++++++++++++------- 1 file changed, 70 insertions(+), 11 deletions(-) diff --git a/arm/micro-bench.c b/arm/micro-bench.c index 91af1f7..dbe8e54 100644 --- a/arm/micro-bench.c +++ b/arm/micro-bench.c @@ -23,6 +23,11 @@ #include #define NTIMES (1U << 16) +#define MAX_NS (5 * 1000 * 1000 * 1000UL) + +#define IRQ_VTIMER 27 +#define ARCH_TIMER_CTL_ENABLE (1 << 0) +#define ARCH_TIMER_CTL_IMASK (1 << 1) static u32 cntfrq; @@ -33,9 +38,16 @@ static bool ipi_hw; static void gic_irq_handler(struct pt_regs *regs) { + u32 irqstat = gic_read_iar(); irq_ready = false; irq_received = true; - gic_write_eoir(gic_read_iar()); + gic_write_eoir(irqstat); + + if (irqstat == IRQ_VTIMER) { + write_sysreg((ARCH_TIMER_CTL_IMASK | ARCH_TIMER_CTL_ENABLE), + cntv_ctl_el0); + isb(); + } irq_ready = true; } @@ -195,6 +207,47 @@ static void lpi_exec(void) assert_msg(irq_received, "failed to receive LPI in time, but received %d successfully\n", received); } +static bool timer_prep(void) +{ + static void *gic_isenabler; + + gic_enable_defaults(); + install_irq_handler(EL1H_IRQ, gic_irq_handler); + local_irq_enable(); + + gic_isenabler = gicv3_sgi_base() + GICR_ISENABLER0; + writel(1 << IRQ_VTIMER, gic_isenabler); + write_sysreg(ARCH_TIMER_CTL_ENABLE, cntv_ctl_el0); + isb(); + + gic_prep_common(); + return true; +} + +static void timer_exec(void) +{ + u64 before_timer; + u64 timer_10ms; + unsigned tries = 1 << 28; + static int received = 0; + + irq_received = false; + + before_timer = read_sysreg(cntvct_el0); + timer_10ms = cntfrq / 100; + write_sysreg(before_timer + timer_10ms, cntv_cval_el0); + write_sysreg(ARCH_TIMER_CTL_ENABLE, cntv_ctl_el0); + isb(); + + while (!irq_received && tries--) + cpu_relax(); + + if (irq_received) + ++received; + + assert_msg(irq_received, "failed to receive PPI in time, but received %d successfully\n", received); +} + static void hvc_exec(void) { asm volatile("mov w0, #0x4b000000; hvc #0" ::: "w0"); @@ -241,6 +294,7 @@ static struct exit_test tests[] = { {"ipi", ipi_prep, ipi_exec, true}, {"ipi_hw", ipi_hw_prep, ipi_exec, true}, {"lpi", lpi_prep, lpi_exec, true}, + {"timer_10ms", timer_prep, timer_exec, true}, }; struct ns_time { @@ -261,27 +315,32 @@ static void ticks_to_ns_time(uint64_t ticks, struct ns_time *ns_time) static void loop_test(struct exit_test *test) { - uint64_t start, end, total_ticks, ntimes = NTIMES; + 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--) + + while (ntimes < NTIMES && total_ns.ns < MAX_NS) { + isb(); + start = read_sysreg(cntpct_el0); test->exec(); - isb(); - end = read_sysreg(cntpct_el0); + isb(); + end = read_sysreg(cntpct_el0); + + ntimes++; + total_ticks += (end - start); + ticks_to_ns_time(total_ticks, &total_ns); + } - 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; + avg_ns.ns = total_ns.ns / ntimes; + avg_ns.ns_frac = total_ns.ns_frac / ntimes; printf("%-30s%15" PRId64 ".%-15" PRId64 "%15" PRId64 ".%-15" PRId64 "\n", test->name, total_ns.ns, total_ns.ns_frac, avg_ns.ns, avg_ns.ns_frac); -- 2.19.1 _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm