Re: [PATCH 11/11] cxl/test: Simulate event log overflow

From: Jonathan Cameron
Date: Wed Nov 16 2022 - 11:10:26 EST


On Thu, 10 Nov 2022 10:57:58 -0800
ira.weiny@xxxxxxxxx wrote:

> From: Ira Weiny <ira.weiny@xxxxxxxxx>
>
> 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.
>
> Signed-off-by: Ira Weiny <ira.weiny@xxxxxxxxx>
Looks fine to me

Reviewed-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
>
> ---
> Changes from RFC
> Adjust for new struct changes
> ---
> tools/testing/cxl/test/events.c | 37 +++++++++++++++++++++++++++++++++
> 1 file changed, 37 insertions(+)
>
> diff --git a/tools/testing/cxl/test/events.c b/tools/testing/cxl/test/events.c
> index 8693f3fb9cbb..5ce257114f4e 100644
> --- a/tools/testing/cxl/test/events.c
> +++ b/tools/testing/cxl/test/events.c
> @@ -69,11 +69,21 @@ static void event_store_add_event(struct mock_event_store *mes,
> log->nr_events++;
> }
>
> +static u16 log_overflow(struct mock_event_log *log)
> +{
> + int cnt = log_rec_left(log) - 5;
> +
> + if (cnt < 0)
> + return 0;
> + return cnt;
> +}
> +
> 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;
> u8 log_type;
> + u16 nr_overflow;
>
> /* Valid request? */
> if (cmd->size_in != sizeof(log_type))
> @@ -95,6 +105,20 @@ int mock_get_event(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *cmd)
> if (log_rec_left(log) > 1)
> pl->flags |= CXL_GET_EVENT_FLAG_MORE_RECORDS;
>
> + nr_overflow = log_overflow(log);
> + if (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);
> + }
> +
> memcpy(&pl->record[0], get_cur_event(log), sizeof(pl->record[0]));
> pl->record[0].hdr.handle = get_cur_event_handle(log);
> return 0;
> @@ -274,6 +298,19 @@ 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);
> + 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);