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spi_master: speed up polling performance by putting into IRAM

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This commit is contained in:
Michael (XIAO Xufeng)
2018-10-22 15:25:41 +08:00
parent d0361a32d7
commit 90d229eb6d
3 changed files with 31 additions and 28 deletions
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components/driver/test/test_spi_master.c
+26 -21
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@@ -1359,9 +1359,26 @@ static void sorted_array_insert(uint32_t* array, int* size, uint32_t item)
#define TEST_TIMES 11
TEST_CASE("spi_speed","[spi]")
static IRAM_ATTR void spi_transmit_measure(spi_device_handle_t spi, spi_transaction_t* trans, uint32_t* t_flight)
{
RECORD_TIME_PREPARE();
spi_device_transmit(spi, trans); // prime the flash cache
RECORD_TIME_START();
spi_device_transmit(spi, trans);
RECORD_TIME_END(t_flight);
}
static IRAM_ATTR void spi_transmit_polling_measure(spi_device_handle_t spi, spi_transaction_t* trans, uint32_t* t_flight)
{
RECORD_TIME_PREPARE();
spi_device_polling_transmit(spi, trans); // prime the flash cache
RECORD_TIME_START();
spi_device_polling_transmit(spi, trans);
RECORD_TIME_END(t_flight);
}
TEST_CASE("spi_speed","[spi]")
{
uint32_t t_flight;
//to get rid of the influence of randomly interrupts, we measured the performance by median value
uint32_t t_flight_sorted[TEST_TIMES];
@@ -1381,16 +1398,13 @@ TEST_CASE("spi_speed","[spi]")
//record flight time by isr, with DMA
t_flight_num = 0;
for (int i = 0; i < TEST_TIMES; i++) {
spi_device_transmit(spi, &trans); // prime the flash cache
RECORD_TIME_START();
spi_device_transmit(spi, &trans);
RECORD_TIME_END(&t_flight);
spi_transmit_measure(spi, &trans, &t_flight);
sorted_array_insert(t_flight_sorted, &t_flight_num, t_flight);
}
TEST_PERFORMANCE_LESS_THAN(SPI_PER_TRANS_NO_POLLING, "%d us", t_flight_sorted[(TEST_TIMES+1)/2]);
for (int i = 0; i < TEST_TIMES; i++) {
ESP_LOGI(TAG, "%d", t_flight_sorted[i]);
}
TEST_PERFORMANCE_LESS_THAN(SPI_PER_TRANS_NO_POLLING, "%d us", t_flight_sorted[(TEST_TIMES+1)/2]);
//acquire the bus to send polling transactions faster
ret = spi_device_acquire_bus(spi, portMAX_DELAY);
@@ -1399,16 +1413,13 @@ TEST_CASE("spi_speed","[spi]")
//record flight time by polling and with DMA
t_flight_num = 0;
for (int i = 0; i < TEST_TIMES; i++) {
spi_device_polling_transmit(spi, &trans); // prime the flash cache
RECORD_TIME_START();
spi_device_polling_transmit(spi, &trans);
RECORD_TIME_END(&t_flight);
spi_transmit_polling_measure(spi, &trans, &t_flight);
sorted_array_insert(t_flight_sorted, &t_flight_num, t_flight);
}
TEST_PERFORMANCE_LESS_THAN(SPI_PER_TRANS_POLLING, "%d us", t_flight_sorted[(TEST_TIMES+1)/2]);
for (int i = 0; i < TEST_TIMES; i++) {
ESP_LOGI(TAG, "%d", t_flight_sorted[i]);
}
TEST_PERFORMANCE_LESS_THAN(SPI_PER_TRANS_POLLING, "%d us", t_flight_sorted[(TEST_TIMES+1)/2]);
//release the bus
spi_device_release_bus(spi);
@@ -1419,16 +1430,13 @@ TEST_CASE("spi_speed","[spi]")
//record flight time by isr, without DMA
t_flight_num = 0;
for (int i = 0; i < TEST_TIMES; i++) {
spi_device_transmit(spi, &trans); // prime the flash cache
RECORD_TIME_START();
spi_device_transmit(spi, &trans);
RECORD_TIME_END(&t_flight);
spi_transmit_measure(spi, &trans, &t_flight);
sorted_array_insert(t_flight_sorted, &t_flight_num, t_flight);
}
TEST_PERFORMANCE_LESS_THAN( SPI_PER_TRANS_NO_POLLING_NO_DMA, "%d us", t_flight_sorted[(TEST_TIMES+1)/2]);
for (int i = 0; i < TEST_TIMES; i++) {
ESP_LOGI(TAG, "%d", t_flight_sorted[i]);
}
TEST_PERFORMANCE_LESS_THAN( SPI_PER_TRANS_NO_POLLING_NO_DMA, "%d us", t_flight_sorted[(TEST_TIMES+1)/2]);
//acquire the bus to send polling transactions faster
ret = spi_device_acquire_bus(spi, portMAX_DELAY);
@@ -1436,16 +1444,13 @@ TEST_CASE("spi_speed","[spi]")
//record flight time by polling, without DMA
t_flight_num = 0;
for (int i = 0; i < TEST_TIMES; i++) {
spi_device_polling_transmit(spi, &trans); // prime the flash cache
RECORD_TIME_START();
spi_device_polling_transmit(spi, &trans);
RECORD_TIME_END(&t_flight);
spi_transmit_polling_measure(spi, &trans, &t_flight);
sorted_array_insert(t_flight_sorted, &t_flight_num, t_flight);
}
TEST_PERFORMANCE_LESS_THAN(SPI_PER_TRANS_POLLING_NO_DMA, "%d us", t_flight_sorted[(TEST_TIMES+1)/2]);
for (int i = 0; i < TEST_TIMES; i++) {
ESP_LOGI(TAG, "%d", t_flight_sorted[i]);
}
TEST_PERFORMANCE_LESS_THAN(SPI_PER_TRANS_POLLING_NO_DMA, "%d us", t_flight_sorted[(TEST_TIMES+1)/2]);
//release the bus
spi_device_release_bus(spi);