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Optimize writing of profiling info.

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This commit is contained in:
Ulrich Drepper 1997-04-05 00:48:13 +00:00
parent b8a7384521
commit f1698e08cc
1 changed files with 38 additions and 14 deletions
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52
gmon/gmon.c
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@ -195,16 +195,23 @@ write_call_graph (fd)
int fd;
{
u_char tag = GMON_TAG_CG_ARC;
struct gmon_cg_arc_record raw_arc
struct gmon_cg_arc_record raw_arc[4]
__attribute__ ((aligned (__alignof__ (char*))));
int from_index, to_index, from_len;
u_long frompc;
struct iovec iov[2] =
struct iovec iov[8] =
{
{ &tag, sizeof (tag) },
{ &raw_arc, sizeof (struct gmon_cg_arc_record) }
{ &raw_arc[0], sizeof (struct gmon_cg_arc_record) },
{ &tag, sizeof (tag) },
{ &raw_arc[1], sizeof (struct gmon_cg_arc_record) },
{ &tag, sizeof (tag) },
{ &raw_arc[2], sizeof (struct gmon_cg_arc_record) },
{ &tag, sizeof (tag) },
{ &raw_arc[3], sizeof (struct gmon_cg_arc_record) },
};
int nfilled = 0;
from_len = _gmonparam.fromssize / sizeof (*_gmonparam.froms);
for (from_index = 0; from_index < from_len; ++from_index)
@ -219,13 +226,19 @@ write_call_graph (fd)
to_index != 0;
to_index = _gmonparam.tos[to_index].link)
{
*(char **) raw_arc.from_pc = (char *)frompc;
*(char **) raw_arc.self_pc = (char *)_gmonparam.tos[to_index].selfpc;
*(int *) raw_arc.count = _gmonparam.tos[to_index].count;
__writev (fd, iov, 2);
if (nfilled > 3)
{
__writev (fd, iov, 2 * nfilled);
nfilled = 0;
}
*(char **) raw_arc[nfilled].from_pc = (char *)frompc;
*(char **) raw_arc[nfilled].self_pc =
(char *)_gmonparam.tos[to_index].selfpc;
*(int *) raw_arc[nfilled].count = _gmonparam.tos[to_index].count;
++nfilled;
}
}
__writev (fd, iov, 2 * nfilled);
}
@ -243,25 +256,36 @@ write_bb_counts (fd)
{ &tag, sizeof (tag) },
{ &ncounts, sizeof (ncounts) }
};
struct iovec bbbody[2];
struct iovec bbbody[8];
int nfilled;
bbbody[0].iov_len = sizeof (grp->addresses[0]);
bbbody[1].iov_len = sizeof (grp->addresses[0]);
for (i = 0; i < (sizeof (bbbody) / sizeof (bbbody[0])); i += 2)
{
bbbody[i].iov_len = sizeof (grp->addresses[0]);
bbbody[i + 1].iov_len = sizeof (grp->counts[0]);
}
/* Write each group of basic-block info (all basic-blocks in a
compilation unit form a single group). */
nfilled = 0;
for (grp = __bb_head; grp; grp = grp->next)
{
ncounts = grp->ncounts;
__writev (fd, bbhead, 2);
for (i = 0; i < ncounts; ++i)
{
bbbody[0].iov_base = (char *) &grp->addresses[i];
bbbody[1].iov_base = &grp->counts[i];
__writev (fd, bbbody, 2);
if (nfilled > (sizeof (bbbody) / sizeof (bbbody[0])) - 2)
{
__writev (fd, bbbody, nfilled);
nfilled = 0;
}
bbbody[nfilled++].iov_base = (char *) &grp->addresses[i];
bbbody[nfilled++].iov_base = &grp->counts[i];
}
}
__writev (fd, bbbody, nfilled);
}