[V2,11/11] cxl/test: Simulate event log overflow

Message ID	20221201002719.2596558-12-ira.weiny@intel.com
State	Superseded
Headers	show Return-Path: <linux-cxl-owner@kernel.org> From: ira.weiny@intel.com To: Dan Williams <dan.j.williams@intel.com> Cc: Ira Weiny <ira.weiny@intel.com>, Jonathan Cameron <Jonathan.Cameron@huawei.com>, Alison Schofield <alison.schofield@intel.com>, Vishal Verma <vishal.l.verma@intel.com>, Ben Widawsky <bwidawsk@kernel.org>, Steven Rostedt <rostedt@goodmis.org>, Davidlohr Bueso <dave@stgolabs.net>, Dave Jiang <dave.jiang@intel.com>, linux-kernel@vger.kernel.org, linux-cxl@vger.kernel.org Subject: [PATCH V2 11/11] cxl/test: Simulate event log overflow Date: Wed, 30 Nov 2022 16:27:19 -0800 Message-Id: <20221201002719.2596558-12-ira.weiny@intel.com> In-Reply-To: <20221201002719.2596558-1-ira.weiny@intel.com> References: <20221201002719.2596558-1-ira.weiny@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk
Series	CXL: Process event logs \| expand [V2,00/11] CXL: Process event logs [V2,01/11] cxl/pci: Add generic MSI-X/MSI irq support [V2,02/11] cxl/mem: Implement Get Event Records command [V2,03/11] cxl/mem: Implement Clear Event Records command [V2,04/11] cxl/mem: Clear events on driver load [V2,05/11] cxl/mem: Trace General Media Event Record [V2,06/11] cxl/mem: Trace DRAM Event Record [V2,07/11] cxl/mem: Trace Memory Module Event Record [V2,08/11] cxl/mem: Wire up event interrupts [V2,09/11] cxl/test: Add generic mock events [V2,10/11] cxl/test: Add specific events [V2,11/11] cxl/test: Simulate event log overflow

Message ID

20221201002719.2596558-12-ira.weiny@intel.com

State

Superseded

Headers

From: ira.weiny@intel.com
To: Dan Williams <dan.j.williams@intel.com>
Cc: Ira Weiny <ira.weiny@intel.com>,
        Jonathan Cameron <Jonathan.Cameron@huawei.com>,
        Alison Schofield <alison.schofield@intel.com>,
        Vishal Verma <vishal.l.verma@intel.com>,
        Ben Widawsky <bwidawsk@kernel.org>,
        Steven Rostedt <rostedt@goodmis.org>,
        Davidlohr Bueso <dave@stgolabs.net>,
        Dave Jiang <dave.jiang@intel.com>,
        linux-kernel@vger.kernel.org, linux-cxl@vger.kernel.org
Subject: [PATCH V2 11/11] cxl/test: Simulate event log overflow
Date: Wed, 30 Nov 2022 16:27:19 -0800
Message-Id: <20221201002719.2596558-12-ira.weiny@intel.com>
In-Reply-To: <20221201002719.2596558-1-ira.weiny@intel.com>
References: <20221201002719.2596558-1-ira.weiny@intel.com>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

Series

CXL: Process event logs | expand

Commit Message

Ira Weiny Dec. 1, 2022, 12:27 a.m. UTC

From: Ira Weiny <ira.weiny@intel.com>

Log overflow is marked by a separate trace message.

Simulate a log with lots of messages and flag overflow until it is
drained a bit.

Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Ira Weiny <ira.weiny@intel.com>

---
Changes from RFC
	Adjust for new struct changes
---
 tools/testing/cxl/test/events.c | 49 ++++++++++++++++++++++++++++++++-
 1 file changed, 48 insertions(+), 1 deletion(-)

Comments

Dave Jiang Dec. 1, 2022, 9:28 p.m. UTC | #1

On 11/30/2022 5:27 PM, ira.weiny@intel.com wrote:
> From: Ira Weiny <ira.weiny@intel.com>
> 
> Log overflow is marked by a separate trace message.
> 
> Simulate a log with lots of messages and flag overflow until it is
> drained a bit.
> 
> Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
> Signed-off-by: Ira Weiny <ira.weiny@intel.com>

Reviewed-by: Dave Jiang <dave.jiang@intel.com>

> 
> ---
> Changes from RFC
> 	Adjust for new struct changes
> ---
>   tools/testing/cxl/test/events.c | 49 ++++++++++++++++++++++++++++++++-
>   1 file changed, 48 insertions(+), 1 deletion(-)
> 
> diff --git a/tools/testing/cxl/test/events.c b/tools/testing/cxl/test/events.c
> index 0bcc485e07da..ceabefb526c2 100644
> --- a/tools/testing/cxl/test/events.c
> +++ b/tools/testing/cxl/test/events.c
> @@ -15,6 +15,8 @@ struct mock_event_log {
>   	u16 clear_idx;
>   	u16 cur_idx;
>   	u16 nr_events;
> +	u16 nr_overflow;
> +	u16 overflow_reset;
>   	struct cxl_event_record_raw *events[CXL_TEST_EVENT_CNT_MAX];
>   };
>   
> @@ -45,6 +47,7 @@ void reset_event_log(struct mock_event_log *log)
>   {
>   	log->cur_idx = 0;
>   	log->clear_idx = 0;
> +	log->nr_overflow = log->overflow_reset;
>   }
>   
>   /* Handle can never be 0 use 1 based indexing for handle */
> @@ -76,8 +79,12 @@ static void event_store_add_event(struct mock_event_store *mes,
>   		return;
>   
>   	log = &mes->mock_logs[log_type];
> -	if (WARN_ON(log->nr_events >= CXL_TEST_EVENT_CNT_MAX))
> +
> +	if ((log->nr_events + 1) > CXL_TEST_EVENT_CNT_MAX) {
> +		log->nr_overflow++;
> +		log->overflow_reset = log->nr_overflow;
>   		return;
> +	}
>   
>   	log->events[log->nr_events] = event;
>   	log->nr_events++;
> @@ -87,6 +94,7 @@ int mock_get_event(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *cmd)
>   {
>   	struct cxl_get_event_payload *pl;
>   	struct mock_event_log *log;
> +	u16 nr_overflow;
>   	u8 log_type;
>   	int i;
>   
> @@ -118,6 +126,21 @@ int mock_get_event(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *cmd)
>   	if (!log_empty(log))
>   		pl->flags |= CXL_GET_EVENT_FLAG_MORE_RECORDS;
>   
> +	if (log->nr_overflow) {
> +		u64 ns;
> +
> +		pl->flags |= CXL_GET_EVENT_FLAG_OVERFLOW;
> +		pl->overflow_err_count = cpu_to_le16(nr_overflow);
> +		ns = ktime_get_real_ns();
> +		ns -= 5000000000; /* 5s ago */
> +		pl->first_overflow_timestamp = cpu_to_le64(ns);
> +		ns = ktime_get_real_ns();
> +		ns -= 1000000000; /* 1s ago */
> +		pl->last_overflow_timestamp = cpu_to_le64(ns);
> +
> +		log->nr_overflow = 0;
> +	}
> +
>   	return 0;
>   }
>   EXPORT_SYMBOL_GPL(mock_get_event);
> @@ -297,6 +320,30 @@ u32 cxl_mock_add_event_logs(struct cxl_dev_state *cxlds)
>   			      (struct cxl_event_record_raw *)&mem_module);
>   	mes->ev_status |= CXLDEV_EVENT_STATUS_INFO;
>   
> +	event_store_add_event(mes, CXL_EVENT_TYPE_FAIL, &maint_needed);
> +	event_store_add_event(mes, CXL_EVENT_TYPE_FAIL, &hardware_replace);
> +	event_store_add_event(mes, CXL_EVENT_TYPE_FAIL,
> +			      (struct cxl_event_record_raw *)&dram);
> +	event_store_add_event(mes, CXL_EVENT_TYPE_FAIL,
> +			      (struct cxl_event_record_raw *)&gen_media);
> +	event_store_add_event(mes, CXL_EVENT_TYPE_FAIL,
> +			      (struct cxl_event_record_raw *)&mem_module);
> +	event_store_add_event(mes, CXL_EVENT_TYPE_FAIL, &hardware_replace);
> +	event_store_add_event(mes, CXL_EVENT_TYPE_FAIL,
> +			      (struct cxl_event_record_raw *)&dram);
> +	/* Overflow this log */
> +	event_store_add_event(mes, CXL_EVENT_TYPE_FAIL, &hardware_replace);
> +	event_store_add_event(mes, CXL_EVENT_TYPE_FAIL, &hardware_replace);
> +	event_store_add_event(mes, CXL_EVENT_TYPE_FAIL, &hardware_replace);
> +	event_store_add_event(mes, CXL_EVENT_TYPE_FAIL, &hardware_replace);
> +	event_store_add_event(mes, CXL_EVENT_TYPE_FAIL, &hardware_replace);
> +	event_store_add_event(mes, CXL_EVENT_TYPE_FAIL, &hardware_replace);
> +	event_store_add_event(mes, CXL_EVENT_TYPE_FAIL, &hardware_replace);
> +	event_store_add_event(mes, CXL_EVENT_TYPE_FAIL, &hardware_replace);
> +	event_store_add_event(mes, CXL_EVENT_TYPE_FAIL, &hardware_replace);
> +	event_store_add_event(mes, CXL_EVENT_TYPE_FAIL, &hardware_replace);
> +	mes->ev_status |= CXLDEV_EVENT_STATUS_FAIL;
> +
>   	event_store_add_event(mes, CXL_EVENT_TYPE_FATAL, &hardware_replace);
>   	event_store_add_event(mes, CXL_EVENT_TYPE_FATAL,
>   			      (struct cxl_event_record_raw *)&dram);

diff --git a/tools/testing/cxl/test/events.c b/tools/testing/cxl/test/events.c
index 0bcc485e07da..ceabefb526c2 100644
--- a/tools/testing/cxl/test/events.c
+++ b/tools/testing/cxl/test/events.c
@@ -15,6 +15,8 @@  struct mock_event_log {
 	u16 clear_idx;
 	u16 cur_idx;
 	u16 nr_events;
+	u16 nr_overflow;
+	u16 overflow_reset;
 	struct cxl_event_record_raw *events[CXL_TEST_EVENT_CNT_MAX];
 };
 
@@ -45,6 +47,7 @@  void reset_event_log(struct mock_event_log *log)
 {
 	log->cur_idx = 0;
 	log->clear_idx = 0;
+	log->nr_overflow = log->overflow_reset;
 }
 
 /* Handle can never be 0 use 1 based indexing for handle */
@@ -76,8 +79,12 @@  static void event_store_add_event(struct mock_event_store *mes,
 		return;
 
 	log = &mes->mock_logs[log_type];
-	if (WARN_ON(log->nr_events >= CXL_TEST_EVENT_CNT_MAX))
+
+	if ((log->nr_events + 1) > CXL_TEST_EVENT_CNT_MAX) {
+		log->nr_overflow++;
+		log->overflow_reset = log->nr_overflow;
 		return;
+	}
 
 	log->events[log->nr_events] = event;
 	log->nr_events++;
@@ -87,6 +94,7 @@  int mock_get_event(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *cmd)
 {
 	struct cxl_get_event_payload *pl;
 	struct mock_event_log *log;
+	u16 nr_overflow;
 	u8 log_type;
 	int i;
 
@@ -118,6 +126,21 @@  int mock_get_event(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *cmd)
 	if (!log_empty(log))
 		pl->flags |= CXL_GET_EVENT_FLAG_MORE_RECORDS;
 
+	if (log->nr_overflow) {
+		u64 ns;
+
+		pl->flags |= CXL_GET_EVENT_FLAG_OVERFLOW;
+		pl->overflow_err_count = cpu_to_le16(nr_overflow);
+		ns = ktime_get_real_ns();
+		ns -= 5000000000; /* 5s ago */
+		pl->first_overflow_timestamp = cpu_to_le64(ns);
+		ns = ktime_get_real_ns();
+		ns -= 1000000000; /* 1s ago */
+		pl->last_overflow_timestamp = cpu_to_le64(ns);
+
+		log->nr_overflow = 0;
+	}
+
 	return 0;
 }
 EXPORT_SYMBOL_GPL(mock_get_event);
@@ -297,6 +320,30 @@  u32 cxl_mock_add_event_logs(struct cxl_dev_state *cxlds)
 			      (struct cxl_event_record_raw *)&mem_module);
 	mes->ev_status |= CXLDEV_EVENT_STATUS_INFO;
 
+	event_store_add_event(mes, CXL_EVENT_TYPE_FAIL, &maint_needed);
+	event_store_add_event(mes, CXL_EVENT_TYPE_FAIL, &hardware_replace);
+	event_store_add_event(mes, CXL_EVENT_TYPE_FAIL,
+			      (struct cxl_event_record_raw *)&dram);
+	event_store_add_event(mes, CXL_EVENT_TYPE_FAIL,
+			      (struct cxl_event_record_raw *)&gen_media);
+	event_store_add_event(mes, CXL_EVENT_TYPE_FAIL,
+			      (struct cxl_event_record_raw *)&mem_module);
+	event_store_add_event(mes, CXL_EVENT_TYPE_FAIL, &hardware_replace);
+	event_store_add_event(mes, CXL_EVENT_TYPE_FAIL,
+			      (struct cxl_event_record_raw *)&dram);
+	/* Overflow this log */
+	event_store_add_event(mes, CXL_EVENT_TYPE_FAIL, &hardware_replace);
+	event_store_add_event(mes, CXL_EVENT_TYPE_FAIL, &hardware_replace);
+	event_store_add_event(mes, CXL_EVENT_TYPE_FAIL, &hardware_replace);
+	event_store_add_event(mes, CXL_EVENT_TYPE_FAIL, &hardware_replace);
+	event_store_add_event(mes, CXL_EVENT_TYPE_FAIL, &hardware_replace);
+	event_store_add_event(mes, CXL_EVENT_TYPE_FAIL, &hardware_replace);
+	event_store_add_event(mes, CXL_EVENT_TYPE_FAIL, &hardware_replace);
+	event_store_add_event(mes, CXL_EVENT_TYPE_FAIL, &hardware_replace);
+	event_store_add_event(mes, CXL_EVENT_TYPE_FAIL, &hardware_replace);
+	event_store_add_event(mes, CXL_EVENT_TYPE_FAIL, &hardware_replace);
+	mes->ev_status |= CXLDEV_EVENT_STATUS_FAIL;
+
 	event_store_add_event(mes, CXL_EVENT_TYPE_FATAL, &hardware_replace);
 	event_store_add_event(mes, CXL_EVENT_TYPE_FATAL,
 			      (struct cxl_event_record_raw *)&dram);

[V2,11/11] cxl/test: Simulate event log overflow

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