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    Subject[PATCH 08/13] scsi: fnic: Define stats to track multiqueue (MQ) IOs
    Date
    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));
    --
    2.31.1
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