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libzfs: calculate receive times with sub-second precision 

Provide two digits of precision when reporting send/receive
times.  Tiny snapshots may take significantly less than a second
and rounding up to a full second can introduce a significant error.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Closes #13047
This commit is contained in:
наб 2022-02-16 01:42:30 +01:00 committed by GitHub
parent 5c0061345b
commit 67de71e644
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 20 additions and 8 deletions
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28
lib/libzfs/libzfs_sendrecv.c
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@ -4168,7 +4168,7 @@ zfs_receive_one(libzfs_handle_t *hdl, int infd, const char *tosnap,
avl_tree_t *stream_avl, char **top_zfs,
const char *finalsnap, nvlist_t *cmdprops)
{
time_t begin_time;
struct timespec begin_time;
int ioctl_err, ioctl_errno, err;
char *cp;
struct drr_begin *drrb = &drr->drr_u.drr_begin;
@ -4202,7 +4202,10 @@ zfs_receive_one(libzfs_handle_t *hdl, int infd, const char *tosnap,
uint8_t *wkeydata = NULL;
uint_t wkeylen = 0;
begin_time = time(NULL);
#ifndef CLOCK_MONOTONIC_RAW
#define CLOCK_MONOTONIC_RAW CLOCK_MONOTONIC
#endif
clock_gettime(CLOCK_MONOTONIC_RAW, &begin_time);
bzero(origin, MAXNAMELEN);
bzero(tmp_keylocation, MAXNAMELEN);
@ -4987,14 +4990,23 @@ zfs_receive_one(libzfs_handle_t *hdl, int infd, const char *tosnap,
char buf1[64];
char buf2[64];
uint64_t bytes = read_bytes;
time_t delta = time(NULL) - begin_time;
if (delta == 0)
delta = 1;
struct timespec delta;
clock_gettime(CLOCK_MONOTONIC_RAW, &delta);
if (begin_time.tv_nsec > delta.tv_nsec) {
delta.tv_nsec =
1000000000 + delta.tv_nsec - begin_time.tv_nsec;
delta.tv_sec -= 1;
} else
delta.tv_nsec -= begin_time.tv_nsec;
delta.tv_sec -= begin_time.tv_sec;
if (delta.tv_sec == 0 && delta.tv_nsec == 0)
delta.tv_nsec = 1;
double delta_f = delta.tv_sec + (delta.tv_nsec / 1e9);
zfs_nicebytes(bytes, buf1, sizeof (buf1));
zfs_nicebytes(bytes/delta, buf2, sizeof (buf1));
zfs_nicebytes(bytes / delta_f, buf2, sizeof (buf2));
(void) printf("received %s stream in %lld seconds (%s/sec)\n",
buf1, (longlong_t)delta, buf2);
(void) printf("received %s stream in %.2f seconds (%s/sec)\n",
buf1, delta_f, buf2);
}
err = 0;