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[78.235.100.105]) by smtp.gmail.com with ESMTPSA id p2sm16156948wjb.21.2015.10.15.05.16.55 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Thu, 15 Oct 2015 05:16:56 -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 Cc: bcousson@baylibre.com, mturquette@baylibre.com, Marc Titinger Subject: [PATCH v8 6/6] PM / Domains: add debugfs 'states' and 'timings' seq files Date: Thu, 15 Oct 2015 14:16:36 +0200 Message-Id: <1444911396-3473-7-git-send-email-ahaslam@baylibre.com> X-Mailer: git-send-email 2.4.5 In-Reply-To: <1444911396-3473-1-git-send-email-ahaslam@baylibre.com> References: <1444911396-3473-1-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, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=ham 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. 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 | 107 +++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 105 insertions(+), 2 deletions(-) diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c index df2f244..c1750ba 100644 --- a/drivers/base/power/domain.c +++ b/drivers/base/power/domain.c @@ -2277,6 +2277,96 @@ 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; @@ -2286,8 +2376,21 @@ static int __init pm_genpd_debug_init(void) if (!pm_genpd_debugfs_dir) return -ENOMEM; - d = debugfs_create_file("pm_genpd_summary", S_IRUGO, - pm_genpd_debugfs_dir, NULL, &pm_genpd_summary_fops); + d = debugfs_create_file("summary", S_IRUGO, + pm_genpd_debugfs_dir, NULL, + &pm_genpd_summary_fops); + if (!d) + return -ENOMEM; + + d = debugfs_create_file("states", S_IRUGO, + pm_genpd_debugfs_dir, NULL, + &pm_genpd_states_fops); + if (!d) + return -ENOMEM; + + d = debugfs_create_file("timings", S_IRUGO, + pm_genpd_debugfs_dir, NULL, + &pm_genpd_timing_fops); if (!d) return -ENOMEM;