diff options
| author | Alberto Garcia <berto@igalia.com> | 2015-10-28 17:33:02 +0200 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2015-11-12 16:22:45 +0100 |
| commit | cb38fffbc968e797ae32039b1e2c47b940b30cb4 (patch) | |
| tree | d28bdc71d24992460b50951def2de9c3a129f2c3 /block/accounting.c | |
| parent | bd797fc15b4290e02c219b7cd6289a33cd6cd18b (diff) | |
block: Add idle_time_ns to BlockDeviceStats
This patch adds the new field 'idle_time_ns' to the BlockDeviceStats
structure, indicating the time that has passed since the previous I/O
operation.
It also adds the block_acct_idle_time_ns() call, to ensure that all
references to the clock type used for accounting are in the same
place. This will later allow us to use a different clock for iotests.
Signed-off-by: Alberto Garcia <berto@igalia.com>
Message-id: 7d8cfcf931453e1a2443e6626e8c1edc347c7c8a.1446044837.git.berto@igalia.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'block/accounting.c')
| -rw-r--r-- | block/accounting.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/block/accounting.c b/block/accounting.c index 6f4c0f12eb..d427fa8fb8 100644 --- a/block/accounting.c +++ b/block/accounting.c @@ -40,12 +40,15 @@ void block_acct_start(BlockAcctStats *stats, BlockAcctCookie *cookie, 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; + assert(cookie->type < BLOCK_MAX_IOTYPE); stats->nr_bytes[cookie->type] += cookie->bytes; stats->nr_ops[cookie->type]++; - stats->total_time_ns[cookie->type] += - qemu_clock_get_ns(clock_type) - cookie->start_time_ns; + stats->total_time_ns[cookie->type] += latency_ns; + stats->last_access_time_ns = time_ns; } @@ -55,3 +58,8 @@ void block_acct_merge_done(BlockAcctStats *stats, enum BlockAcctType type, assert(type < BLOCK_MAX_IOTYPE); stats->merged[type] += num_requests; } + +int64_t block_acct_idle_time_ns(BlockAcctStats *stats) +{ + return qemu_clock_get_ns(clock_type) - stats->last_access_time_ns; +} |