From patchwork Mon Oct 19 14:51:41 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Axel Haslam X-Patchwork-Id: 7437621 Return-Path: X-Original-To: patchwork-linux-pm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id AF61ABEEA4 for ; Mon, 19 Oct 2015 14:53:45 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id C685D206AD for ; Mon, 19 Oct 2015 14:53:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A0AF62065F for ; Mon, 19 Oct 2015 14:53:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753951AbbJSOwh (ORCPT ); Mon, 19 Oct 2015 10:52:37 -0400 Received: from mail-wi0-f173.google.com ([209.85.212.173]:34137 "EHLO mail-wi0-f173.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753324AbbJSOwe (ORCPT ); Mon, 19 Oct 2015 10:52:34 -0400 Received: by wikq8 with SMTP id q8so9610105wik.1 for ; Mon, 19 Oct 2015 07:52:33 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=IOAycKKnTvZqRove/HK7df/66wCne3K0EkBYw1pI3bU=; b=d3/ERMflzkVpCcOBSWHRyr9gfkUXUe0zpwhyZ8Vq7xzfUBcrOhzzXJ5U3dxOG8ptea htNujpdfyWXzMUEtXWb2RqaejyY98gzIvT797yjSJutv1IQ1mzyooPhGQo/XaXykBz5a zNG/DTYYPg0f9veXd1H8ns8/fw4FC+3MR2zoZ3P5N3bzYmcQl1KaVLcAjxlF3SCwss9I 63mFFt0Dj427oNMgBuP2G/OGwtxh5XlJ4otADBsZmhFLBQDeFD25XMxSKfrtPNYz38a4 RWtxNGrCA3L1+vOXaKVV1lzdjxaOp1BXQFa+YABem1tUwMewYdyGFSyEVeWsl7qtHOKf vFIw== X-Gm-Message-State: ALoCoQkJrY+2kUvnaWycq5oB2Dwl5b/TKlcUeyYKGPmhA2fN9e0n7LjXMlh8dot7QBD0Kr0g52Po X-Received: by 10.194.239.167 with SMTP id vt7mr32477956wjc.110.1445266352840; Mon, 19 Oct 2015 07:52:32 -0700 (PDT) Received: from localhost.localdomain (cag06-6-78-235-100-105.fbx.proxad.net. [78.235.100.105]) by smtp.gmail.com with ESMTPSA id ly4sm40619557wjb.4.2015.10.19.07.52.30 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 19 Oct 2015 07:52:32 -0700 (PDT) From: ahaslam@baylibre.com To: khilman@linaro.org, ulf.hansson@linaro.org, lina.iyer@linaro.org, geert@glider.be, k.kozlowski.k@gmail.com, rjw@rjwysocki.net, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org Cc: bcousson@baylibre.com, mturquette@baylibre.com, Marc Titinger Subject: [PATCH v9 6/6] PM / Domains: add debugfs 'states' and 'timings' seq files Date: Mon, 19 Oct 2015 16:51:41 +0200 Message-Id: <1445266301-32448-7-git-send-email-ahaslam@baylibre.com> X-Mailer: git-send-email 2.4.5 In-Reply-To: <1445266301-32448-1-git-send-email-ahaslam@baylibre.com> References: <1445266301-32448-1-git-send-email-ahaslam@baylibre.com> Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Marc Titinger This purpose of these debug seq-files is to help investigate generic power domain state transitions, based on device constraints. requires the "multiple states" patches from Axel Haslam. also rename 'summary' from 'pm_genpd_summary' sample output for 'states' ========================== Domain State name Eval = 2200nter + Exit = Min_off_on (ns) ----------------------------------------------------------------------- a53_pd cluster-sleep-0 1500000+800000=2300000 a57_pd d1-retention 1000000+800000=1800000 a57_pd cluster-sleep-0 1500000+800000=2300000 sample output for 'timings' =========================== Domain Devices, Timings in ns Stop/Start Save/Restore, Effective ---------------------------------------------------- --- a53_pd /cpus/cpu@100 1060 /660 1580 /1940 ,0 (cached stop) /cpus/cpu@101 1060 /740 1520 /1600 ,0 (cached stop) /cpus/cpu@102 880 /620 1380 /1780 ,0 (cached stop) /cpus/cpu@103 1080 /640 1340 /1600 ,0 (cached stop) a57_pd /cpus/cpu@0 1160 /740 3280 /1800 ,0 (cached stop) /cpus/cpu@1 780 /1400 1440 /2080 ,0 (cached stop) /D1 600 /540 7140 /6420 ,2199460 (cached stop) Signed-off-by: Marc Titinger --- drivers/base/power/domain.c | 115 +++++++++++++++++++++++++++++++++++++++++--- 1 file changed, 107 insertions(+), 8 deletions(-) diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c index 3ab75cc..a1ec430 100644 --- a/drivers/base/power/domain.c +++ b/drivers/base/power/domain.c @@ -2046,21 +2046,120 @@ static const struct file_operations pm_genpd_summary_fops = { .release = single_release, }; +static int pm_genpd_states_show(struct seq_file *s, void *data) +{ + struct generic_pm_domain *genpd; + + seq_puts(s, + "\n Domain State name Enter + Exit = Min_off_on (ns)\n"); + seq_puts(s, + "-----------------------------------------------------------------------\n"); + + list_for_each_entry(genpd, &gpd_list, gpd_list_node) { + + int i; + + for (i = 0; i < genpd->state_count; i++) { + seq_printf(s, "%-20s %-20s %lld+%lld=%lld\n", + genpd->name, + genpd->states[i].name, + genpd->states[i].power_on_latency_ns, + genpd->states[i].power_off_latency_ns, + genpd->states[i].power_off_latency_ns + + genpd->states[i].power_on_latency_ns); + } + + } + + seq_puts(s, "\n"); + + return 0; +} + +static int pm_genpd_states_open(struct inode *inode, struct file *file) +{ + return single_open(file, pm_genpd_states_show, NULL); +} + +static const struct file_operations pm_genpd_states_fops = { + .open = pm_genpd_states_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +static int pm_genpd_timing_show(struct seq_file *s, void *data) +{ + struct generic_pm_domain *genpd; + + seq_puts(s, "\n Domain Devices, Timings in ns\n"); + seq_puts(s, + " Stop/Start Save/Restore, Effective\n"); + seq_puts(s, + "---------------------------------------------------- ---\n"); + + list_for_each_entry(genpd, &gpd_list, gpd_list_node) { + struct pm_domain_data *pm_data; + + seq_printf(s, "%-30s", genpd->name); + + list_for_each_entry(pm_data, &genpd->dev_list, list_node) { + struct gpd_timing_data *td = &to_gpd_data(pm_data)->td; + + if (!pm_data->dev->of_node) + continue; + + seq_printf(s, + "\n %-20s %-6lld/%-6lld %-6lld/%-6lld,%lld %s%s", + pm_data->dev->of_node->full_name, + td->stop_latency_ns, td->start_latency_ns, + td->save_state_latency_ns, + td->restore_state_latency_ns, + td->effective_constraint_ns, + td->cached_stop_ok ? "(cached stop) " : "", + td->constraint_changed ? "(changed)" : ""); + } + seq_puts(s, "\n"); + } + return 0; +} + +static int pm_genpd_timing_open(struct inode *inode, struct file *file) +{ + return single_open(file, pm_genpd_timing_show, NULL); +} + +static const struct file_operations pm_genpd_timing_fops = { + .open = pm_genpd_timing_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + static int __init pm_genpd_debug_init(void) { - struct dentry *d; + struct dentry *d = NULL; pm_genpd_debugfs_dir = debugfs_create_dir("pm_genpd", NULL); - if (!pm_genpd_debugfs_dir) - return -ENOMEM; + if (pm_genpd_debugfs_dir) + d = debugfs_create_file("summary", S_IRUGO, + pm_genpd_debugfs_dir, NULL, + &pm_genpd_summary_fops); + if (d) + d = debugfs_create_file("states", S_IRUGO, + pm_genpd_debugfs_dir, NULL, + &pm_genpd_states_fops); + if (d) + d = debugfs_create_file("timings", S_IRUGO, + pm_genpd_debugfs_dir, NULL, + &pm_genpd_timing_fops); + if (d) + return 0; - d = debugfs_create_file("pm_genpd_summary", S_IRUGO, - pm_genpd_debugfs_dir, NULL, &pm_genpd_summary_fops); - if (!d) - return -ENOMEM; + debugfs_remove_recursive(pm_genpd_debugfs_dir /*can be null*/); - return 0; + return -ENOMEM; } late_initcall(pm_genpd_debug_init);