Re: [PATCH v2 08/13] scsi: fnic: Define stats to track multiqueue (MQ) IOs

Hannes Reinecke
2023-11-02T07:47:01Z

On 10/27/23 20:02, Karan Tilak Kumar wrote:
> Define an array to track IOs for the different queues,
> print the IO stats in fnic get stats data.
>
> Reviewed-by: Sesidhar Baddela <sebaddel@cisco.com>
> Reviewed-by: Arulprabhu Ponnusamy <arulponn@cisco.com>
> Signed-off-by: Karan Tilak Kumar <kartilak@cisco.com>
> ---
> drivers/scsi/fnic/fnic_stats.h | 2 ++
> drivers/scsi/fnic/fnic_trace.c | 11 +++++++++++
> 2 files changed, 13 insertions(+)
>
> diff --git a/drivers/scsi/fnic/fnic_stats.h b/drivers/scsi/fnic/fnic_stats.h
> index 07d1556e3c32..9d7f98c452dd 100644
> --- a/drivers/scsi/fnic/fnic_stats.h
> +++ b/drivers/scsi/fnic/fnic_stats.h
> @@ -2,6 +2,7 @@
> /* Copyright 2013 Cisco Systems, Inc. All rights reserved. */
> #ifndef _FNIC_STATS_H_
> #define _FNIC_STATS_H_
> +#define FNIC_MQ_MAX_QUEUES 64
>
> struct stats_timestamps {
> struct timespec64 last_reset_time;
> @@ -26,6 +27,7 @@ struct io_path_stats {
> atomic64_t io_btw_10000_to_30000_msec;
> atomic64_t io_greater_than_30000_msec;
> atomic64_t current_max_io_time;
> + atomic64_t ios[FNIC_MQ_MAX_QUEUES];
> };
>
> struct abort_stats {
> diff --git a/drivers/scsi/fnic/fnic_trace.c b/drivers/scsi/fnic/fnic_trace.c
> index be0d7c57b242..aaa4ea02fb7c 100644
> --- a/drivers/scsi/fnic/fnic_trace.c
> +++ b/drivers/scsi/fnic/fnic_trace.c
> @@ -204,6 +204,7 @@ int fnic_get_stats_data(struct stats_debug_info *debug,
> int len = 0;
> int buf_size = debug->buf_size;
> struct timespec64 val1, val2;
> + int i = 0;
>
> ktime_get_real_ts64(&val1);
> len = scnprintf(debug->debug_buffer + len, buf_size - len,
> @@ -266,6 +267,16 @@ int fnic_get_stats_data(struct stats_debug_info *debug,
> (u64)atomic64_read(&stats->io_stats.io_btw_10000_to_30000_msec),
> (u64)atomic64_read(&stats->io_stats.io_greater_than_30000_msec));
>
> + len += scnprintf(debug->debug_buffer + len, buf_size - len,
> + "------------------------------------------\n"
> + "\t\tIO Queues and cumulative IOs\n"
> + "------------------------------------------\n");
> +
> + for (i = 0; i < FNIC_MQ_MAX_QUEUES; i++) {
> + len += scnprintf(debug->debug_buffer + len, buf_size - len,
> + "Q:%d -> %lld\n", i, (u64)atomic64_read(&stats->io_stats.ios[i]));
> + }
> +
> len += scnprintf(debug->debug_buffer + len, buf_size - len,
> "\nCurrent Max IO time : %lld\n",
> (u64)atomic64_read(&stats->io_stats.current_max_io_time));

Reviewed-by: Hannes Reinecke <hare@suse.de>

Cheers,

Hannes
--
Dr. Hannes Reinecke Kernel Storage Architect
hare@suse.de +49 911 74053 688
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