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Add a counter to the qdio performance statistics that indicates that no free buffers were left in the input queue. If the counter gets increased it means that the qdio adapter filled all available buffers and possibly had more buffers ready but could not transmit them. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
62 lines
1.4 KiB
C
62 lines
1.4 KiB
C
/*
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* drivers/s390/cio/qdio_perf.h
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*
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* Copyright IBM Corp. 2008
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*
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* Author: Jan Glauber (jang@linux.vnet.ibm.com)
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*/
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#ifndef QDIO_PERF_H
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#define QDIO_PERF_H
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#include <linux/types.h>
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#include <asm/atomic.h>
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struct qdio_perf_stats {
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/* interrupt handler calls */
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atomic_long_t qdio_int;
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atomic_long_t pci_int;
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atomic_long_t thin_int;
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/* tasklet runs */
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atomic_long_t tasklet_inbound;
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atomic_long_t tasklet_outbound;
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atomic_long_t tasklet_thinint;
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atomic_long_t tasklet_thinint_loop;
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atomic_long_t thinint_inbound;
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atomic_long_t thinint_inbound_loop;
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atomic_long_t thinint_inbound_loop2;
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/* signal adapter calls */
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atomic_long_t siga_out;
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atomic_long_t siga_in;
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atomic_long_t siga_sync;
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/* misc */
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atomic_long_t inbound_handler;
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atomic_long_t outbound_handler;
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atomic_long_t fast_requeue;
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atomic_long_t outbound_target_full;
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atomic_long_t inbound_queue_full;
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/* for debugging */
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atomic_long_t debug_tl_out_timer;
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atomic_long_t debug_stop_polling;
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atomic_long_t debug_eqbs_all;
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atomic_long_t debug_eqbs_incomplete;
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atomic_long_t debug_sqbs_all;
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atomic_long_t debug_sqbs_incomplete;
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};
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extern struct qdio_perf_stats perf_stats;
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extern int qdio_performance_stats;
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static inline void qdio_perf_stat_inc(atomic_long_t *count)
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{
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if (qdio_performance_stats)
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atomic_long_inc(count);
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}
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int qdio_setup_perf_stats(void);
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void qdio_remove_perf_stats(void);
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#endif
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