On 2016/01/28 1:45, Xie, Huawei wrote:
> On 1/21/2016 7:09 PM, Tetsuya Mukawa wrote:
>> +qtest_find_pci_device(struct qtest_session *s, uint16_t bus, uint8_t device)
>> +{
>> + struct qtest_pci_device *dev;
>> + uint32_t val;
>> +
>> + val = qtest_pci_inl(s, bus, device, 0, 0);
>> + TAILQ_FOREACH(dev, &s->head, next) {
>> + if (val == ((uint32_t)dev->device_id << 16 | dev->vendor_id)) {
>> + dev->bus_addr = bus;
>> + dev->device_addr = device;
>> + return;
>> + }
>> +
>> + }
>> +}
>> +
>> +static int
>> +qtest_init_pci_devices(struct qtest_session *s)
>> +{
>> + struct qtest_pci_device *dev;
>> + uint16_t bus;
>> + uint8_t device;
>> + int ret;
>> +
>> + /* Find devices */
>> + bus = 0;
>> + do {
>> + device = 0;
>> + do {
>> + qtest_find_pci_device(s, bus, device);
>> + } while (device++ != NB_DEVICE - 1);
>> + } while (bus++ != NB_BUS - 1);
> Seems this scan of all the pci devices is very time consuming operation,
> and each scan involves socket communication.
> Do you measure how long it takes to do the pci devices initialization?
I measured it, and seems it takes 0.35 seconds in my environment.
This will be done only once when the port is initialized. Probably it's
not so heady.
Tetsuya
