diff options
| author | Alberto Garcia <berto@igalia.com> | 2015-10-28 17:33:09 +0200 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2015-11-12 16:22:46 +0100 |
| commit | 918a17a464bac332b14a19d87106acc81e476f05 (patch) | |
| tree | 2bdf50cd9a5e56d00ccef6da8a3f69371a786353 /block | |
| parent | 556c2b60714e7dae3ed0eb3488910435263dc09f (diff) | |
block: Use QEMU_CLOCK_VIRTUAL for the accounting code in qtest mode
This patch switches to QEMU_CLOCK_VIRTUAL for the accounting code in
qtest mode, and makes the latency of the operation constant. This way we
can perform tests on the accounting code with reproducible results.
Signed-off-by: Alberto Garcia <berto@igalia.com>
Message-id: 35ed0501450fa572684e9b5e92c361ab6cce565b.1446044838.git.berto@igalia.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'block')
| -rw-r--r-- | block/accounting.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/block/accounting.c b/block/accounting.c index a9419315a3..05a5c5fdf3 100644 --- a/block/accounting.c +++ b/block/accounting.c @@ -25,14 +25,20 @@ #include "block/accounting.h" #include "block/block_int.h" #include "qemu/timer.h" +#include "sysemu/qtest.h" static QEMUClockType clock_type = QEMU_CLOCK_REALTIME; +static const int qtest_latency_ns = NANOSECONDS_PER_SECOND / 1000; void block_acct_init(BlockAcctStats *stats, bool account_invalid, bool account_failed) { stats->account_invalid = account_invalid; stats->account_failed = account_failed; + + if (qtest_enabled()) { + clock_type = QEMU_CLOCK_VIRTUAL; + } } void block_acct_cleanup(BlockAcctStats *stats) @@ -84,6 +90,10 @@ void block_acct_done(BlockAcctStats *stats, BlockAcctCookie *cookie) int64_t time_ns = qemu_clock_get_ns(clock_type); int64_t latency_ns = time_ns - cookie->start_time_ns; + if (qtest_enabled()) { + latency_ns = qtest_latency_ns; + } + assert(cookie->type < BLOCK_MAX_IOTYPE); stats->nr_bytes[cookie->type] += cookie->bytes; @@ -107,6 +117,10 @@ void block_acct_failed(BlockAcctStats *stats, BlockAcctCookie *cookie) int64_t time_ns = qemu_clock_get_ns(clock_type); int64_t latency_ns = time_ns - cookie->start_time_ns; + if (qtest_enabled()) { + latency_ns = qtest_latency_ns; + } + stats->total_time_ns[cookie->type] += latency_ns; stats->last_access_time_ns = time_ns; |