haraldwolff/qemu-patch-raspberry4
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libqos/ahci: Swap memread/write with bufread/write

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Where it makes sense, use the new faster primitives.
For generally small reads/writes such as for the PRDT
and FIS packets, stick with the more wasteful but
easier to debug memread/memwrite.

For ahci-test (before migration tests):
With this patch:
real    0m3.675s
user    0m2.582s
sys     0m1.718s

Without any qtest protocol improvements:
real    0m14.171s
user    0m12.072s
sys     0m12.527s

Signed-off-by: John Snow <jsnow@redhat.com>
Message-id: 1430864578-22072-6-git-send-email-jsnow@redhat.com
This commit is contained in:
John Snow 2015-05-22 14:13:44 -04:00
parent 4d00796364
commit 91d0374a7f
2 changed files with 6 additions and 6 deletions
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8
tests/ahci-test.c
View file

@ -874,7 +874,7 @@ static void ahci_test_io_rw_simple(AHCIQState *ahci, unsigned bufsize,
/* Write some indicative pattern to our buffer. */
generate_pattern(tx, bufsize, AHCI_SECTOR_SIZE);
memwrite(ptr, tx, bufsize);
bufwrite(ptr, tx, bufsize);
/* Write this buffer to disk, then read it back to the DMA buffer. */
ahci_guest_io(ahci, port, write_cmd, ptr, bufsize, sector);
@ -882,7 +882,7 @@ static void ahci_test_io_rw_simple(AHCIQState *ahci, unsigned bufsize,
ahci_guest_io(ahci, port, read_cmd, ptr, bufsize, sector);
/*** Read back the Data ***/
memread(ptr, rx, bufsize);
bufread(ptr, rx, bufsize);
g_assert_cmphex(memcmp(tx, rx, bufsize), ==, 0);
ahci_free(ahci, ptr);
@ -1018,7 +1018,7 @@ static void test_dma_fragmented(void)
/* Create a DMA buffer in guest memory, and write our pattern to it. */
ptr = guest_alloc(ahci->parent->alloc, bufsize);
g_assert(ptr);
memwrite(ptr, tx, bufsize);
bufwrite(ptr, tx, bufsize);
cmd = ahci_command_create(CMD_WRITE_DMA);
ahci_command_adjust(cmd, 0, ptr, bufsize, 32);
@ -1035,7 +1035,7 @@ static void test_dma_fragmented(void)
g_free(cmd);
/* Read back the guest's receive buffer into local memory */
memread(ptr, rx, bufsize);
bufread(ptr, rx, bufsize);
guest_free(ahci->parent->alloc, ptr);
g_assert_cmphex(memcmp(tx, rx, bufsize), ==, 0);

4
tests/libqos/ahci.c
View file

@ -653,13 +653,13 @@ void ahci_io(AHCIQState *ahci, uint8_t port, uint8_t ide_cmd,
qmemset(ptr, 0x00, bufsize);
if (props->write) {
memwrite(ptr, buffer, bufsize);
bufwrite(ptr, buffer, bufsize);
}
ahci_guest_io(ahci, port, ide_cmd, ptr, bufsize, sector);
if (props->read) {
memread(ptr, buffer, bufsize);
bufread(ptr, buffer, bufsize);
}
ahci_free(ahci, ptr);