From: Grzegorz Andrejczuk <grzegorz.andrejczuk@xxxxxxxxx>
Add a simple trace event taking context number and building simple
histogram to print packets distribution between contexts.
Reviewed-by: Mike Marciniszyn <mike.marciniszyn@xxxxxxxxx>
Reviewed-by: Dennis Dalessandro <dennis.dalessandro@xxxxxxxxx>
Signed-off-by: Grzegorz Andrejczuk <grzegorz.andrejczuk@xxxxxxxxx>
Signed-off-by: Kaike Wan <kaike.wan@xxxxxxxxx>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@xxxxxxxxx>
---
drivers/infiniband/hw/hfi1/driver.c | 1 +
drivers/infiniband/hw/hfi1/trace.c | 32 ++++++++++++++++++++++++++++++
drivers/infiniband/hw/hfi1/trace_ctxts.h | 11 +++++++++-
3 files changed, 43 insertions(+), 1 deletion(-)
diff --git a/drivers/infiniband/hw/hfi1/driver.c b/drivers/infiniband/hw/hfi1/driver.c
index 60ff6de..a40701a 100644
--- a/drivers/infiniband/hw/hfi1/driver.c
+++ b/drivers/infiniband/hw/hfi1/driver.c
@@ -1706,6 +1706,7 @@ static void hfi1_ipoib_ib_rcv(struct hfi1_packet *packet)
goto drop_no_nd;
trace_input_ibhdr(rcd->dd, packet, !!(rhf_dc_info(packet->rhf)));
+ trace_ctxt_rsm_hist(rcd->ctxt);
/* handle congestion notifications */
do_work = hfi1_may_ecn(packet);
diff --git a/drivers/infiniband/hw/hfi1/trace.c b/drivers/infiniband/hw/hfi1/trace.c
index c8a9988..b219ea9 100644
--- a/drivers/infiniband/hw/hfi1/trace.c
+++ b/drivers/infiniband/hw/hfi1/trace.c
@@ -520,6 +520,38 @@ u16 hfi1_trace_get_tid_idx(u32 ent)
return EXP_TID_GET(ent, IDX);
}
+struct hfi1_ctxt_hist {
+ atomic_t count;
+ atomic_t data[255];
+};
+
+struct hfi1_ctxt_hist hist = {
+ .count = ATOMIC_INIT(0)
+};
+
+const char *hfi1_trace_print_rsm_hist(struct trace_seq *p, unsigned int ctxt)
+{
+ int i, len = ARRAY_SIZE(hist.data);
+ const char *ret = trace_seq_buffer_ptr(p);
+ unsigned long packet_count = atomic_fetch_inc(&hist.count);
+
+ trace_seq_printf(p, "packet[%lu]", packet_count);
+ for (i = 0; i < len; ++i) {
+ unsigned long val;
+ atomic_t *count = &hist.data[i];
+
+ if (ctxt == i)
+ val = atomic_fetch_inc(count);
+ else
+ val = atomic_read(count);
+
+ if (val)
+ trace_seq_printf(p, "(%d:%lu)", i, val);
+ }
+ trace_seq_putc(p, 0);
+ return ret;
+}
+
__hfi1_trace_fn(AFFINITY);
__hfi1_trace_fn(PKT);
__hfi1_trace_fn(PROC);
diff --git a/drivers/infiniband/hw/hfi1/trace_ctxts.h b/drivers/infiniband/hw/hfi1/trace_ctxts.h
index b5fc5c6..d8c168d 100644
--- a/drivers/infiniband/hw/hfi1/trace_ctxts.h
+++ b/drivers/infiniband/hw/hfi1/trace_ctxts.h
@@ -1,5 +1,5 @@
/*
-* Copyright(c) 2015, 2016 Intel Corporation.
+* Copyright(c) 2015 - 2020 Intel Corporation.
*
* This file is provided under a dual BSD/GPLv2 license. When using or
* redistributing this file, you may do so under either license.
@@ -138,6 +138,15 @@
)
);
+const char *hfi1_trace_print_rsm_hist(struct trace_seq *p, unsigned int ctxt);
+TRACE_EVENT(ctxt_rsm_hist,
+ TP_PROTO(unsigned int ctxt),
+ TP_ARGS(ctxt),
+ TP_STRUCT__entry(__field(unsigned int, ctxt)),
+ TP_fast_assign(__entry->ctxt = ctxt;),
+ TP_printk("%s", hfi1_trace_print_rsm_hist(p, __entry->ctxt))
+);
+
#endif /* __HFI1_TRACE_CTXTS_H */
#undef TRACE_INCLUDE_PATH
