diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/ntb/test/ntb_perf.c | 67 |
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: |