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qtest: pre-buffer hex nibs 

Instead of converting each byte one-at-a-time and then sending each byte
over the wire, use sprintf() to pre-compute all of the hex nibs into a
single buffer, then send the entire buffer all at once.

This gives a moderate speed boost to memread() and memwrite() functions.

Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Message-id: 1431021095-7558-2-git-send-email-jsnow@redhat.com
This commit is contained in:
John Snow 2015-05-22 14:13:44 -04:00
parent 91d0374a7f
commit 5560b85a31
2 changed files with 12 additions and 7 deletions
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11
qtest.c
View File

@ -414,6 +414,7 @@ static void qtest_process_command(CharDriverState *chr, gchar **words)
} else if (strcmp(words[0], "read") == 0) {
uint64_t addr, len, i;
uint8_t *data;
char *enc;
g_assert(words[1] && words[2]);
addr = strtoull(words[1], NULL, 0);
@ -422,14 +423,16 @@ static void qtest_process_command(CharDriverState *chr, gchar **words)
data = g_malloc(len);
cpu_physical_memory_read(addr, data, len);
qtest_send_prefix(chr);
qtest_send(chr, "OK 0x");
enc = g_malloc(2 * len + 1);
for (i = 0; i < len; i++) {
qtest_sendf(chr, "%02x", data[i]);
sprintf(&enc[i * 2], "%02x", data[i]);
}
qtest_send(chr, "\n");
qtest_send_prefix(chr);
qtest_sendf(chr, "OK 0x%s\n", enc);
g_free(data);
g_free(enc);
} else if (strcmp(words[0], "b64read") == 0) {
uint64_t addr, len;
uint8_t *data;

8
tests/libqtest.c
View File

@ -730,13 +730,15 @@ void qtest_memwrite(QTestState *s, uint64_t addr, const void *data, size_t size)
{
const uint8_t *ptr = data;
size_t i;
char *enc = g_malloc(2 * size + 1);
qtest_sendf(s, "write 0x%" PRIx64 " 0x%zx 0x", addr, size);
for (i = 0; i < size; i++) {
qtest_sendf(s, "%02x", ptr[i]);
sprintf(&enc[i * 2], "%02x", ptr[i]);
}
qtest_sendf(s, "\n");
qtest_sendf(s, "write 0x%" PRIx64 " 0x%zx 0x%s\n", addr, size, enc);
qtest_rsp(s, 0);
g_free(enc);
}
void qtest_memset(QTestState *s, uint64_t addr, uint8_t pattern, size_t size)