diff options
| -rw-r--r-- | Documentation/dmatest.txt | 4 | ||||
| -rw-r--r-- | drivers/dma/dmatest.c | 35 |
2 files changed, 37 insertions, 2 deletions
diff --git a/Documentation/dmatest.txt b/Documentation/dmatest.txt index e6e16a7..0beb4b6 100644 --- a/Documentation/dmatest.txt +++ b/Documentation/dmatest.txt @@ -77,5 +77,9 @@ the parens represents additional information, e.g. error code, error counter, or status. A test thread also emits a summary line at completion listing the number of tests executed, number that failed, and a result code. +Example: + % dmesg | tail -n 1 + dmatest: dma3chan0-copy0: summary 400000 tests, 0 failures iops: 61524 KB/s 246098 (0) + The details of a data miscompare error are also emitted, but do not follow the above format. diff --git a/drivers/dma/dmatest.c b/drivers/dma/dmatest.c index d07b732..26b5020 100644 --- a/drivers/dma/dmatest.c +++ b/drivers/dma/dmatest.c @@ -325,6 +325,29 @@ static void dbg_result(const char *err, unsigned int n, unsigned int src_off, current->comm, n, err, src_off, dst_off, len, data); } +static unsigned long long dmatest_persec(s64 runtime, unsigned int val) +{ + unsigned long long per_sec = 1000000; + + if (runtime <= 0) + return 0; + + /* drop precision until runtime is 32-bits */ + while (runtime > UINT_MAX) { + runtime >>= 1; + per_sec <<= 1; + } + + per_sec *= val; + do_div(per_sec, runtime); + return per_sec; +} + +static unsigned long long dmatest_KBs(s64 runtime, unsigned long long len) +{ + return dmatest_persec(runtime, len >> 10); +} + /* * This function repeatedly tests DMA transfers of various lengths and * offsets for a given operation type until it is told to exit by @@ -360,6 +383,9 @@ static int dmatest_func(void *data) int src_cnt; int dst_cnt; int i; + ktime_t ktime; + s64 runtime = 0; + unsigned long long total_len = 0; set_freezable(); @@ -417,6 +443,7 @@ static int dmatest_func(void *data) */ flags = DMA_CTRL_ACK | DMA_PREP_INTERRUPT; + ktime = ktime_get(); while (!kthread_should_stop() && !(params->iterations && total_tests >= params->iterations)) { struct dma_async_tx_descriptor *tx = NULL; @@ -464,6 +491,7 @@ static int dmatest_func(void *data) len = (len >> align) << align; if (!len) len = 1 << align; + total_len += len; for (i = 0; i < src_cnt; i++) { u8 *buf = thread->srcs[i] + src_off; @@ -607,6 +635,7 @@ static int dmatest_func(void *data) len, 0); } } + runtime = ktime_us_delta(ktime_get(), ktime); ret = 0; for (i = 0; thread->dsts[i]; i++) @@ -621,8 +650,10 @@ err_srcbuf: err_srcs: kfree(pq_coefs); err_thread_type: - pr_info("%s: terminating after %u tests, %u failures (status %d)\n", - current->comm, total_tests, failed_tests, ret); + pr_info("%s: summary %u tests, %u failures %llu iops %llu KB/s (%d)\n", + current->comm, total_tests, failed_tests, + dmatest_persec(runtime, total_tests), + dmatest_KBs(runtime, total_len), ret); /* terminate all transfers on specified channels */ if (ret) |
