kolaaaa2
Joined: 09 Dec 2008
Posts: 1
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 Posted: Wed Dec 10, 2008 12:26 am Post subject: Profiling with gprof |
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Hi,
I have try profiling with trunk/pspsdk/src/prof, but can't make it works with the current toolchain (old gmon.out format ?).
After a look at gprof sources, I made some modifications in prof.c file. I don't know much about gprof, but here's a patch that works for me :
| Code: | --- prof.c.ori 2008-12-09 14:44:50.000000000 +0100
+++ prof.c 2008-12-09 15:06:09.000000000 +0100
@@ -26,12 +26,19 @@
/** gmon.out file header */
struct gmonhdr
{
+ char cookie[4];
+ char version[4];
+ char spare[3*4];
+};
+
+struct gmonhisthdr
+{
int lpc; /* lowest pc address */
int hpc; /* highest pc address */
int ncnt; /* size of samples + size of header */
- int version; /* version number */
int profrate; /* profiling clock rate */
- int resv[3]; /* reserved */
+ char dimension[15];
+ char abbrev;
};
/** frompc -> selfpc graph */
@@ -55,7 +62,7 @@
struct rawarc *arcs;
int nsamples;
- unsigned int *samples;
+ unsigned short int *samples;
int timer;
@@ -110,7 +117,7 @@
}
gp.nsamples = (gp.textsize + gp.hashfraction - 1) / gp.hashfraction;
- gp.samples = (unsigned int *)malloc(sizeof(unsigned int) * gp.nsamples);
+ gp.samples = (unsigned short int *)malloc(sizeof(unsigned short int) * gp.nsamples);
if (gp.samples == NULL)
{
free(gp.arcs);
@@ -120,7 +127,7 @@
}
memset((void *)gp.arcs, '\0', gp.narcs * (sizeof(struct rawarc)));
- memset((void *)gp.samples, '\0', gp.nsamples * (sizeof(unsigned int )));
+ memset((void *)gp.samples, '\0', gp.nsamples * (sizeof(unsigned short int )));
gp.timer = sceKernelCreateVTimer("gprof timer", NULL);
@@ -161,6 +168,7 @@
FILE *fp;
int i;
struct gmonhdr hdr;
+ struct gmonhisthdr histhdr;
if (gp.state != GMON_PROF_ON)
{
@@ -174,21 +182,29 @@
sceKernelStopVTimer(gp.timer);
fp = fopen("gmon.out", "wb");
- hdr.lpc = gp.lowpc;
- hdr.hpc = gp.highpc;
- hdr.ncnt = sizeof(hdr) + (sizeof(unsigned int) * gp.nsamples);
- hdr.version = GMONVERSION;
- hdr.profrate = SAMPLE_FREQ;
- hdr.resv[0] = 0;
- hdr.resv[1] = 0;
- hdr.resv[2] = 0;
+
+ memset(&hdr, 0x00, sizeof(hdr));
+ memcpy(hdr.cookie, "gmon", 4);
+ hdr.version[0]=1;
fwrite(&hdr, 1, sizeof(hdr), fp);
- fwrite(gp.samples, gp.nsamples, sizeof(unsigned int), fp);
+
+ fputc(0x00, fp); /* GMON_TAG_TIME_HIST */
+ memset(&histhdr, 0x00, sizeof(histhdr));
+ histhdr.lpc = gp.lowpc - gp.lowpc;
+ histhdr.hpc = gp.highpc - gp.lowpc;
+ histhdr.ncnt = gp.nsamples;
+ histhdr.profrate = SAMPLE_FREQ;
+ strcpy(histhdr.dimension, "seconds");
+ histhdr.abbrev = 's';
+ fwrite(&histhdr, 1, sizeof(histhdr), fp);
+ fwrite(gp.samples, gp.nsamples, sizeof(unsigned short int), fp);
+
for (i=0; i<gp.narcs; i++)
{
if (gp.arcs[i].count > 0)
{
+ fputc(0x01, fp); /* GMON_TAG_CG_ARC */
fwrite(gp.arcs + i, sizeof(struct rawarc), 1, fp);
}
}
@@ -230,8 +246,8 @@
gp.pc = selfpc;
e = (frompc - gp.lowpc) / gp.hashfraction;
arc = gp.arcs + e;
- arc->frompc = frompc;
- arc->selfpc = selfpc;
+ arc->frompc = frompc - gp.lowpc;
+ arc->selfpc = selfpc - gp.lowpc;
arc->count++;
}
} |
Regards,
kolaaaa |
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