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Diffstat (limited to 'drivers/ntb')
-rw-r--r--drivers/ntb/test/ntb_perf.c67
1 files changed, 55 insertions, 12 deletions
diff --git a/drivers/ntb/test/ntb_perf.c b/drivers/ntb/test/ntb_perf.c
index db4dc61164ca..05a870524a67 100644
--- a/drivers/ntb/test/ntb_perf.c
+++ b/drivers/ntb/test/ntb_perf.c
@@ -123,6 +123,9 @@ struct pthr_ctx {
int src_idx;
void *srcs[MAX_SRCS];
wait_queue_head_t *wq;
+ int status;
+ u64 copied;
+ u64 diff_us;
};
struct perf_ctx {
@@ -305,7 +308,7 @@ static int perf_move_data(struct pthr_ctx *pctx, char __iomem *dst, char *src,
}
if (use_dma) {
- pr_info("%s: All DMA descriptors submitted\n", current->comm);
+ pr_debug("%s: All DMA descriptors submitted\n", current->comm);
while (atomic_read(&pctx->dma_sync) != 0) {
if (kthread_should_stop())
break;
@@ -317,13 +320,16 @@ static int perf_move_data(struct pthr_ctx *pctx, char __iomem *dst, char *src,
kdiff = ktime_sub(kstop, kstart);
diff_us = ktime_to_us(kdiff);
- pr_info("%s: copied %llu bytes\n", current->comm, copied);
+ pr_debug("%s: copied %llu bytes\n", current->comm, copied);
- pr_info("%s: lasted %llu usecs\n", current->comm, diff_us);
+ pr_debug("%s: lasted %llu usecs\n", current->comm, diff_us);
perf = div64_u64(copied, diff_us);
- pr_info("%s: MBytes/s: %llu\n", current->comm, perf);
+ pr_debug("%s: MBytes/s: %llu\n", current->comm, perf);
+
+ pctx->copied = copied;
+ pctx->diff_us = diff_us;
return 0;
}
@@ -345,7 +351,7 @@ static int ntb_perf_thread(void *data)
int rc, node, i;
struct dma_chan *dma_chan = NULL;
- pr_info("kthread %s starting...\n", current->comm);
+ pr_debug("kthread %s starting...\n", current->comm);
node = dev_to_node(&pdev->dev);
@@ -575,19 +581,44 @@ static ssize_t debugfs_run_read(struct file *filp, char __user *ubuf,
{
struct perf_ctx *perf = filp->private_data;
char *buf;
- ssize_t ret, out_offset;
- int running;
+ ssize_t ret, out_off = 0;
+ struct pthr_ctx *pctx;
+ int i;
+ u64 rate;
if (!perf)
return 0;
- buf = kmalloc(64, GFP_KERNEL);
+ buf = kmalloc(1024, GFP_KERNEL);
if (!buf)
return -ENOMEM;
- running = mutex_is_locked(&perf->run_mutex);
- out_offset = snprintf(buf, 64, "%d\n", running);
- ret = simple_read_from_buffer(ubuf, count, offp, buf, out_offset);
+ if (mutex_is_locked(&perf->run_mutex)) {
+ out_off = snprintf(buf, 64, "running\n");
+ goto read_from_buf;
+ }
+
+ for (i = 0; i < MAX_THREADS; i++) {
+ pctx = &perf->pthr_ctx[i];
+
+ if (pctx->status == -ENODATA)
+ break;
+
+ if (pctx->status) {
+ out_off += snprintf(buf + out_off, 1024 - out_off,
+ "%d: error %d\n", i,
+ pctx->status);
+ continue;
+ }
+
+ rate = div64_u64(pctx->copied, pctx->diff_us);
+ out_off += snprintf(buf + out_off, 1024 - out_off,
+ "%d: copied %llu bytes in %llu usecs, %llu MBytes/s\n",
+ i, pctx->copied, pctx->diff_us, rate);
+ }
+
+read_from_buf:
+ ret = simple_read_from_buffer(ubuf, count, offp, buf, out_off);
kfree(buf);
return ret;
@@ -601,12 +632,20 @@ static void threads_cleanup(struct perf_ctx *perf)
for (i = 0; i < MAX_THREADS; i++) {
pctx = &perf->pthr_ctx[i];
if (pctx->thread) {
- kthread_stop(pctx->thread);
+ pctx->status = kthread_stop(pctx->thread);
pctx->thread = NULL;
}
}
}
+static void perf_clear_thread_status(struct perf_ctx *perf)
+{
+ int i;
+
+ for (i = 0; i < MAX_THREADS; i++)
+ perf->pthr_ctx[i].status = -ENODATA;
+}
+
static ssize_t debugfs_run_write(struct file *filp, const char __user *ubuf,
size_t count, loff_t *offp)
{
@@ -623,6 +662,8 @@ static ssize_t debugfs_run_write(struct file *filp, const char __user *ubuf,
if (!mutex_trylock(&perf->run_mutex))
return -EBUSY;
+ perf_clear_thread_status(perf);
+
if (perf->perf_threads > MAX_THREADS) {
perf->perf_threads = MAX_THREADS;
pr_info("Reset total threads to: %u\n", MAX_THREADS);
@@ -757,6 +798,8 @@ static int perf_probe(struct ntb_client *client, struct ntb_dev *ntb)
if (rc)
goto err_ctx;
+ perf_clear_thread_status(perf);
+
return 0;
err_ctx: