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Commit 3567dca1 authored by Satish Kharat's avatar Satish Kharat Committed by Martin K. Petersen
Browse files

scsi: fnic: fnic stats for max CQs processed and ISR time 



This change is to add fnic stats for the max number of CQs (corresponding
to copy WQ) processed in a given interrupt, max time taken by the ISR.

Signed-off-by: default avatarSatish Kharat <satishkh@cisco.com>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent d948e638

drivers/scsi/fnic/fnic_scsi.c

+19 −0
Original line number Diff line number Diff line
@@ -1325,13 +1325,32 @@ int fnic_wq_copy_cmpl_handler(struct fnic *fnic, int copy_work_to_do) 
	unsigned int wq_work_done = 0;

	unsigned int i, cq_index;

	unsigned int cur_work_done;

	struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats;

	u64 start_jiffies = 0;

	u64 end_jiffies = 0;

	u64 delta_jiffies = 0;

	u64 delta_ms = 0;



	for (i = 0; i < fnic->wq_copy_count; i++) {

		cq_index = i + fnic->raw_wq_count + fnic->rq_count;



		start_jiffies = jiffies;

		cur_work_done = vnic_cq_copy_service(&fnic->cq[cq_index],

						     fnic_fcpio_cmpl_handler,

						     copy_work_to_do);

		end_jiffies = jiffies;



		wq_work_done += cur_work_done;

		delta_jiffies = end_jiffies - start_jiffies;

		if (delta_jiffies >

			(u64) atomic64_read(&misc_stats->max_isr_jiffies)) {

			atomic64_set(&misc_stats->max_isr_jiffies,

					delta_jiffies);

			delta_ms = jiffies_to_msecs(delta_jiffies);

			atomic64_set(&misc_stats->max_isr_time_ms, delta_ms);

			atomic64_set(&misc_stats->corr_work_done,

					cur_work_done);

		}

	}

	return wq_work_done;

}

drivers/scsi/fnic/fnic_stats.h

+3 −0
Original line number Diff line number Diff line
@@ -97,6 +97,9 @@ struct vlan_stats { 
struct misc_stats {

	u64 last_isr_time;

	u64 last_ack_time;

	atomic64_t max_isr_jiffies;

	atomic64_t max_isr_time_ms;

	atomic64_t corr_work_done;

	atomic64_t isr_count;

	atomic64_t max_cq_entries;

	atomic64_t ack_index_out_of_range;

drivers/scsi/fnic/fnic_trace.c

+6 −0
Original line number Diff line number Diff line
@@ -409,6 +409,9 @@ int fnic_get_stats_data(struct stats_debug_info *debug, 
	len += snprintf(debug->debug_buffer + len, buf_size - len,

		  "Last ISR time: %llu (%8llu.%09lu)\n"

		  "Last ACK time: %llu (%8llu.%09lu)\n"

		  "Max ISR jiffies: %llu\n"

		  "Max ISR time (ms) (0 denotes < 1 ms): %llu\n"

		  "Corr. work done: %llu\n"

		  "Number of ISRs: %lld\n"

		  "Maximum CQ Entries: %lld\n"

		  "Number of ACK index out of range: %lld\n"
@@ -428,6 +431,9 @@ int fnic_get_stats_data(struct stats_debug_info *debug, 
		  (s64)val1.tv_sec, val1.tv_nsec,

		  (u64)stats->misc_stats.last_ack_time,

		  (s64)val2.tv_sec, val2.tv_nsec,

		  (u64)atomic64_read(&stats->misc_stats.max_isr_jiffies),

		  (u64)atomic64_read(&stats->misc_stats.max_isr_time_ms),

		  (u64)atomic64_read(&stats->misc_stats.corr_work_done),

		  (u64)atomic64_read(&stats->misc_stats.isr_count),

		  (u64)atomic64_read(&stats->misc_stats.max_cq_entries),

		  (u64)atomic64_read(&stats->misc_stats.ack_index_out_of_range),