libcpc/i386/event_pentium.c

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved.
 */

/*
 * Routines to capture processor-dependencies in event specification.
 */

#include <sys/types.h>
#include <string.h>
#include <strings.h>
#include <stdlib.h>
#include <stdio.h>
#include <libintl.h>
#include <assert.h>
#include <errno.h>

#include "libcpc.h"
#include "libcpc_impl.h"

/*
 * Event specifications for Pentium performance counters are based
 * on the content of a getsubopt-like string.
 * The string should contain something that looks like this:
 *
 *  pic0=<eventspec>,pic1=<eventspec>
 *      [,cmask0=<maskspec>][,cmask1=<maskspec>]
 *      [,umask0=<maskspec>][,umask1=<maskspec>]
 *      [,inv[0|1]][,noedge[0|1]]
 *      [,sys[0|1]][,nouser[0|1]]
 *
 * For example:
 *  pic0=data_mem_refs,pic1=l2_ld,sys
 * or
 *  pic0=l2_ld,pic1=bus_drdy_clocks,umask1=0x20,nouser1
 *
 * By default, user event counting is enabled, system event counting
 * is disabled.
 *
 * Note that Pentium and Pentium Pro have different event specifications.
 *
 * The two events must be named.  The names can be ascii or
 * a decimal, octal or hexadecimal number as parsed by strtol(3C).
 *
 * The routine counts the number of errors encountered while parsing
 * the string, if no errors are encountered, the event handle is
 * returned.
 */

const char *
cpc_getusage(int cpuver)
{
    switch (cpuver) {
    case CPC_PENTIUM_PRO_MMX:
    case CPC_PENTIUM_PRO:
        return ("pic0=<event0>,pic1=<event1> "
            "[,sys[0|1]] "
            "[,nouser[0|1]] "
            "[,noedge[0|1]] "
            "[,pc[0|1]] "
            "[,int[0|1]] "
            "[,inv[0|1]] "
            "[,cmask[0|1]=<maskspec>] "
            "[,umask[0|1]=<maskspec>] ");
    case CPC_PENTIUM_MMX:
    case CPC_PENTIUM:
        return ("pic0=<event0>,pic1=<event1> "
            "[,sys[0|1]] "
            "[,nouser[0|1]] "
            "[,noedge[0|1]] "
            "[,pc[0|1]]");
    default:
        return (NULL);
    }
}

struct keyval {
    char *kv_token;
    int (*kv_action)(const char *,
        const struct keyval *, int, char *, uint32_t *);
    uint_t kv_regno;
    uint32_t kv_mask;
    int kv_shift;
};

/*ARGSUSED*/
static int
eightbits(const char *fn,
    const struct keyval *kv, int cpuver, char *value, uint32_t *bits)
{
    char *eptr = NULL;
    long l;

    if (value == NULL) {
        __cpc_error(fn, gettext("missing '%s' value\n"),
            kv->kv_token);
        return (-1);
    }
    l = strtol(value, &eptr, 0);
    if (value == eptr || l < 0 || l > UINT8_MAX) {
        __cpc_error(fn, gettext("bad '%s' value\n"), kv->kv_token);
        return (-1);
    }
    bits[kv->kv_regno] |= ((uint8_t)l & kv->kv_mask) << kv->kv_shift;
    return (0);
}

static int
picbits(const char *fn,
    const struct keyval *kv, int cpuver, char *value, uint32_t *bits)
{
    uint8_t val8;
    uint_t regno;

    regno = strcmp(kv->kv_token, "pic0") == 0 ? 0 : 1;

    if (value == NULL) {
        __cpc_error(fn, gettext("missing '%s' value\n"),
            kv->kv_token);
        return (-1);
    }

    if (__cpc_name_to_reg(cpuver, regno, value, &val8) != 0) {
        switch (cpuver) {
        case CPC_PENTIUM_PRO_MMX:
        case CPC_PENTIUM_PRO:
            assert(kv->kv_regno == regno);
            __cpc_error(fn, gettext(
                "PerfCtr%d cannot measure '%s' on this cpu\n"),
                regno, value);
            break;
        case CPC_PENTIUM_MMX:
        case CPC_PENTIUM:
            assert(kv->kv_regno == 0);
            __cpc_error(fn, gettext(
                "CTR%d cannot measure '%s' on this cpu\n"),
                regno, value);
            break;
        }
        return (-1);
    }
    bits[kv->kv_regno] |= (val8 & kv->kv_mask) << kv->kv_shift;
    return (0);
}

/*ARGSUSED2*/
static int
bitclr(const char *fn,
    const struct keyval *kv, int cpuver, char *value, uint32_t *bits)
{
    if (value != NULL) {
        __cpc_error(fn, gettext("bad arg to '%s'\n"), kv->kv_token);
        return (-1);
    }
    bits[kv->kv_regno] &= ~(kv->kv_mask << kv->kv_shift);
    return (0);
}

/*ARGSUSED2*/
static int
bitset(const char *fn,
    const struct keyval *kv, int cpuver, char *value, uint32_t *bits)
{
    if (value != NULL) {
        __cpc_error(fn, gettext("bad arg to '%s'\n"), kv->kv_token);
        return (-1);
    }
    bits[kv->kv_regno] |= (kv->kv_mask << kv->kv_shift);
    return (0);
}

static int
nextpair(const char *fn,
    const struct keyval *kv, int cpuver, char *value, uint32_t *bits)
{
    int rv;

    if (value != NULL) {
        __cpc_error(fn, gettext("bad arg to '%s'\n"), kv->kv_token);
        return (-1);
    }
    kv++;
    if ((rv = kv->kv_action(fn, kv, cpuver, value, bits)) != 0)
        return (rv);
    kv++;
    return (kv->kv_action(fn, kv, cpuver, value, bits));
}

/*
 * This token table must match the keyval tables below.
 */

static char * const tokens[] = {
#define D_pic0      0
    "pic0",         /* takes a valid event name */
#define D_pic1      1
    "pic1",         /* takes a valid event name */
#define D_nouser    2
    "nouser",       /* disables user counts */
#define D_nouser0   3
    "nouser0",
#define D_nouser1   4
    "nouser1",
#define D_sys       5
    "sys",          /* enables system counts */
#define D_sys0      6
    "sys0",
#define D_sys1      7
    "sys1",
#define D_noedge    8
    "noedge",       /* disable edge detect */
#define D_noedge0   9
    "noedge0",
#define D_noedge1   10
    "noedge1",
#define D_pc        11
    "pc",           /* sets pin control high */
#define D_pc0       12
    "pc0",
#define D_pc1       13
    "pc1",

/*
 * These additional keywords are for Pentium Pro / Pentium II machines.
 */
#define D_int       14
    "int",          /* enable interrupt on counter overflow */
#define D_int0      15
    "int0",
#define D_int1      16
    "int1",
#define D_inv       17
    "inv",          /* invert cmask comparison */
#define D_inv0      18
    "inv0",
#define D_inv1      19
    "inv1",
#define D_umask0    20
    "umask0",       /* PerfCtr0 unit mask */
#define D_umask1    21
    "umask1",       /* PerfCtr1 unit mask */
#define D_cmask0    22
    "cmask0",       /* PerfCtr0 counter mask */
#define D_cmask1    23
    "cmask1",       /* PerfCtr1 counter mask */
    NULL
};

static const struct keyval p6_keyvals[] = {
    { "pic0",   picbits,    0,
        CPC_P6_PES_PIC0_MASK,   0 },
    { "pic1",   picbits,    1,
        CPC_P6_PES_PIC1_MASK,   0 },
    { "nouser", nextpair },
    { "nouser0",    bitclr,     0,
        UINT32_C(1),        CPC_P6_PES_USR },
    { "nouser1",    bitclr,     1,
        UINT32_C(1),        CPC_P6_PES_USR },
    { "sys",    nextpair },
    { "sys0",   bitset,     0,
        UINT32_C(1),        CPC_P6_PES_OS },
    { "sys1",   bitset,     1,
        UINT32_C(1),        CPC_P6_PES_OS },
    { "noedge", nextpair },
    { "noedge0",    bitclr,     0,
        UINT32_C(1),        CPC_P6_PES_E },
    { "noedge1",    bitclr,     1,
        UINT32_C(1),        CPC_P6_PES_E },
    { "pc",     nextpair },
    { "pc0",    bitset,     0,
        UINT32_C(1),        CPC_P6_PES_PC },
    { "pc1",    bitset,     1,
        UINT32_C(1),        CPC_P6_PES_PC },
    { "int",    nextpair },
    { "int0",   bitset,     0,
        UINT32_C(1),        CPC_P6_PES_INT },
    { "int1",   bitset,     1,
        UINT32_C(1),        CPC_P6_PES_INT },
    { "inv",    nextpair },
    { "inv0",   bitset,     0,
        UINT32_C(1),        CPC_P6_PES_INV },
    { "inv1",   bitset,     1,
        UINT32_C(1),        CPC_P6_PES_INV },
    { "umask0", eightbits,  0,
        CPC_P6_PES_UMASK_MASK,  CPC_P6_PES_UMASK_SHIFT },
    { "umask1", eightbits,  1,
        CPC_P6_PES_UMASK_MASK,  CPC_P6_PES_UMASK_SHIFT },
    { "cmask0", eightbits,  0,
        CPC_P6_PES_CMASK_MASK,  CPC_P6_PES_CMASK_SHIFT },
    { "cmask1", eightbits,  1,
        CPC_P6_PES_CMASK_MASK,  CPC_P6_PES_CMASK_SHIFT },
};

/*
 * Note that this table -must- be an identically indexed
 * subset of p6_keyvals.
 */
static const struct keyval p5_keyvals[] = {
    { "pic0",   picbits,    0,
        CPC_P5_CESR_ES0_MASK,   CPC_P5_CESR_ES0_SHIFT },
    { "pic1",   picbits,    0,
        CPC_P5_CESR_ES1_MASK,   CPC_P5_CESR_ES1_SHIFT },
    { "nouser", nextpair },
    { "nouser0",    bitclr,     0,
        UINT32_C(1),        CPC_P5_CESR_USR0 },
    { "nouser1",    bitclr,     0,
        UINT32_C(1),        CPC_P5_CESR_USR1 },
    { "sys",    nextpair },
    { "sys0",   bitset,     0,
        UINT32_C(1),        CPC_P5_CESR_OS0 },
    { "sys1",   bitset,     0,
        UINT32_C(1),        CPC_P5_CESR_OS1 },
    { "noedge", nextpair },
    { "noedge0",    bitset,     0,
        UINT32_C(1),        CPC_P5_CESR_CLK0 },
    { "noedge1",    bitset,     0,
        UINT32_C(1),        CPC_P5_CESR_CLK1 },
    { "pc",     nextpair },
    { "pc0",    bitset,     0,
        UINT32_C(1),        CPC_P5_CESR_PC0 },
    { "pc1",    bitset,     0,
        UINT32_C(1),        CPC_P5_CESR_PC1 },
};

#if !defined(NDEBUG)
#pragma init(__tablecheck)

static void
__tablecheck(void)
{
    uint_t ntokens = sizeof (tokens) / sizeof (tokens[0]) - 1;
    uint_t p6_nkeys = sizeof (p6_keyvals) / sizeof (p6_keyvals[0]);
    uint_t p5_nkeys = sizeof (p5_keyvals) / sizeof (p5_keyvals[0]);
    uint_t n;

    assert(ntokens == p6_nkeys);
    for (n = 0; n < ntokens; n++)
        assert(strcmp(tokens[n], p6_keyvals[n].kv_token) == 0);
    assert(p6_nkeys >= p5_nkeys);
    for (n = 0; n < p5_nkeys; n++)
        assert(strcmp(tokens[n], p5_keyvals[n].kv_token) == 0);
}

#endif  /* !NDEBUG */

int
cpc_strtoevent(int cpuver, const char *spec, cpc_event_t *event)
{
    static const char fn[] = "strtoevent";
    char *value;
    char *pic[2];
    char *opts;
    int errcnt = 0;
    uint_t ntokens;
    const struct keyval *keyvals;
    uint32_t *bits;

    if (spec == NULL)
        return (errcnt = 1);

    bzero(event, sizeof (*event));
    switch (event->ce_cpuver = cpuver) {
    case CPC_PENTIUM_PRO_MMX:
    case CPC_PENTIUM_PRO:
        keyvals = p6_keyvals;
        ntokens = sizeof (p6_keyvals) / sizeof (p6_keyvals[0]);
        bits = &event->ce_pes[0];
        bits[0] = bits[1] =
            (1u << CPC_P6_PES_USR) | (1u << CPC_P6_PES_E);
        break;
    case CPC_PENTIUM_MMX:
    case CPC_PENTIUM:
        keyvals = p5_keyvals;
        ntokens = sizeof (p5_keyvals) / sizeof (p5_keyvals[0]);
        bits = &event->ce_cesr;
        bits[0] =
            (1u << CPC_P5_CESR_USR0) | (1u << CPC_P5_CESR_USR1);
        break;
    default:
        return (errcnt = 1);
    }

    pic[0] = pic[1] = NULL;

    opts = strdupa(spec);
    while (*opts != '\0') {
        const struct keyval *kv;
        int idx = getsubopt(&opts, tokens, &value);

        if (idx >= 0 && idx < ntokens) {
            kv = &keyvals[idx];
            if (kv->kv_action(fn, kv, cpuver, value, bits) != 0) {
                errcnt++;
                break;
            }

            if (idx == D_pic0) {
                if (pic[0] != NULL) {
                    __cpc_error(fn,
                        "repeated '%s' token\n",
                        tokens[idx]);
                    errcnt++;
                    break;
                }
                pic[0] = value;
            } else if (idx == D_pic1) {
                if (pic[1] != NULL) {
                    __cpc_error(fn,
                        "repeated '%s' token\n",
                        tokens[idx]);
                    errcnt++;
                    break;
                }
                pic[1] = value;
            }
        } else if (idx == -1) {
            /*
             * The token given wasn't recognized.
             * See if it was an implicit pic specification..
             */
            if (pic[0] == NULL) {
                kv = &keyvals[D_pic0];
                if (kv->kv_action(fn,
                    kv, cpuver, value, bits) != 0) {
                    errcnt++;
                    break;
                }
                pic[0] = value;
            } else if (pic[1] == NULL) {
                kv = &keyvals[D_pic1];
                if (kv->kv_action(fn,
                    kv, cpuver, value, bits) != 0) {
                    errcnt++;
                    break;
                }
                pic[1] = value;
            } else {
                __cpc_error(fn,
                    gettext("bad token '%s'\n"), value);
                errcnt++;
                break;
            }
        } else {
            if (idx >= 0 &&
                idx < sizeof (tokens) / sizeof (tokens[0]))
                __cpc_error(fn,
                    gettext("bad token '%s'\n"), tokens[idx]);
            else
                __cpc_error(fn, gettext("bad token\n"));
            errcnt++;
            break;
        }
    }

    if (pic[0] == NULL || pic[1] == NULL) {
        __cpc_error(fn, gettext("two events must be specified\n"));
        errcnt++;
    }

    return (errcnt);
}

/*
 * Return a printable description of the control registers.
 *
 * This routine should always succeed (notwithstanding heap problems),
 * but may not be able to correctly decode the registers, if, for
 * example, a new processor is under test.
 *
 * The caller is responsible for free(3c)ing the string returned.
 */

static void
flagstostr(char *buf, int flag0, int flag1, int defvalue, char *tok)
{
    buf += strlen(buf);
    if (flag0 != defvalue) {
        if (flag1 != defvalue)
            (void) sprintf(buf, ",%s", tok);
        else
            (void) sprintf(buf, ",%s0", tok);
    } else {
        if (flag1 != defvalue)
            (void) sprintf(buf, ",%s1", tok);
    }
}

static void
masktostr(char *buf, uint8_t bits, char *tok)
{
    if (bits != 0) {
        buf += strlen(buf);
        (void) sprintf(buf, ",%s=0x%x", tok, bits);
    }
}

static char *
val8tostr(uint8_t bits)
{
    char buf[2 + 2 + 1];    /* 0x %2x \0 */
    (void) snprintf(buf, sizeof (buf), "0x%x", bits);
    return (strdup(buf));
}

static char *
regtostr(int cpuver, int regno, uint8_t bits)
{
    const char *sname;

    if ((sname = __cpc_reg_to_name(cpuver, regno, bits)) != NULL)
        return (strdup(sname));
    return (val8tostr(bits));
}

struct xpes {
    uint8_t cmask, umask, evsel;
    int usr, sys, edge, inv, irupt, pc;
};

/*ARGSUSED1*/
static void
unmake_pes(uint32_t pes, int cpuver, struct xpes *xpes)
{
    xpes->cmask = (uint8_t)(pes >> CPC_P6_PES_CMASK_SHIFT);
    xpes->pc = (pes >> CPC_P6_PES_PC) & 1u;
    xpes->inv = (pes >> CPC_P6_PES_INV) & 1u;
    xpes->irupt = (pes >> CPC_P6_PES_INT) & 1u;
    xpes->edge = (pes >> CPC_P6_PES_E) & 1u;
    xpes->sys = (pes >> CPC_P6_PES_OS) & 1u;
    xpes->usr = (pes >> CPC_P6_PES_USR) & 1u;
    xpes->umask = (uint8_t)(pes >> CPC_P6_PES_UMASK_SHIFT);
    xpes->evsel = (uint8_t)pes;
}

struct xcesr {
    uint8_t evsel[2];
    int usr[2], sys[2], clk[2], pc[2];
};

/*ARGSUSED1*/
static void
unmake_cesr(uint32_t cesr, int cpuver, struct xcesr *xcesr)
{
    xcesr->evsel[0] = (cesr >> CPC_P5_CESR_ES0_SHIFT) &
        CPC_P5_CESR_ES0_MASK;
    xcesr->evsel[1] = (cesr >> CPC_P5_CESR_ES1_SHIFT) &
        CPC_P5_CESR_ES1_MASK;
    xcesr->usr[0] = (cesr >> CPC_P5_CESR_USR0) & 1u;
    xcesr->usr[1] = (cesr >> CPC_P5_CESR_USR1) & 1u;
    xcesr->sys[0] = (cesr >> CPC_P5_CESR_OS0) & 1u;
    xcesr->sys[1] = (cesr >> CPC_P5_CESR_OS1) & 1u;
    xcesr->clk[0] = (cesr >> CPC_P5_CESR_CLK0) & 1u;
    xcesr->clk[1] = (cesr >> CPC_P5_CESR_CLK1) & 1u;
    xcesr->pc[0] = (cesr >> CPC_P5_CESR_PC0) & 1u;
    xcesr->pc[1] = (cesr >> CPC_P5_CESR_PC1) & 1u;
    /*
     * If usr and sys are both disabled, the counter is disabled.
     */
    if (xcesr->usr[0] == 0 && xcesr->sys[0] == 0)
        xcesr->clk[0] = 0;
    if (xcesr->usr[1] == 0 && xcesr->sys[1] == 0)
        xcesr->clk[1] = 0;
}

char *
cpc_eventtostr(cpc_event_t *event)
{
    char *pic[2];
    char buffer[1024];
    int cpuver = event->ce_cpuver;

    switch (cpuver) {
    case CPC_PENTIUM_PRO_MMX:
    case CPC_PENTIUM_PRO:
    {
        struct xpes xpes[2];

        unmake_pes(event->ce_pes[0], cpuver, &xpes[0]);
        if ((pic[0] = regtostr(cpuver, 0, xpes[0].evsel)) == NULL)
            return (NULL);

        unmake_pes(event->ce_pes[1], cpuver, &xpes[1]);
        if ((pic[1] = regtostr(cpuver, 1, xpes[1].evsel)) == NULL) {
            free(pic[0]);
            return (NULL);
        }
        (void) snprintf(buffer, sizeof (buffer), "%s=%s,%s=%s",
            tokens[D_pic0], pic[0], tokens[D_pic1], pic[1]);
        free(pic[1]);
        free(pic[0]);
        masktostr(buffer, xpes[0].cmask, tokens[D_cmask0]);
        masktostr(buffer, xpes[1].cmask, tokens[D_cmask1]);
        masktostr(buffer, xpes[0].umask, tokens[D_umask0]);
        masktostr(buffer, xpes[1].umask, tokens[D_umask1]);
        flagstostr(buffer,
            xpes[0].usr, xpes[1].usr, 1, tokens[D_nouser]);
        flagstostr(buffer,
            xpes[0].sys, xpes[1].sys, 0, tokens[D_sys]);
        flagstostr(buffer,
            xpes[0].edge, xpes[1].edge, 1, tokens[D_noedge]);
        flagstostr(buffer,
            xpes[0].irupt, xpes[1].irupt, 0, tokens[D_int]);
        flagstostr(buffer,
            xpes[0].inv, xpes[1].inv, 0, tokens[D_inv]);
        flagstostr(buffer,
            xpes[0].pc, xpes[1].pc, 0, tokens[D_pc]);
        break;
    }
    case CPC_PENTIUM_MMX:
    case CPC_PENTIUM:
    {
        struct xcesr xcesr;

        unmake_cesr(event->ce_cesr, cpuver, &xcesr);
        if ((pic[0] = regtostr(cpuver, 0, xcesr.evsel[0])) == NULL)
            return (NULL);
        if ((pic[1] = regtostr(cpuver, 1, xcesr.evsel[1])) == NULL) {
            free(pic[0]);
            return (NULL);
        }
        (void) snprintf(buffer, sizeof (buffer), "%s=%s,%s=%s",
            tokens[D_pic0], pic[0], tokens[D_pic1], pic[1]);
        free(pic[1]);
        free(pic[0]);
        flagstostr(buffer,
            xcesr.usr[0], xcesr.usr[1], 1, tokens[D_nouser]);
        flagstostr(buffer,
            xcesr.sys[0], xcesr.sys[1], 0, tokens[D_sys]);
        flagstostr(buffer,
            xcesr.clk[0], xcesr.clk[1], 0, tokens[D_noedge]);
        flagstostr(buffer,
            xcesr.pc[0], xcesr.pc[1], 0, tokens[D_pc]);
        break;
    }
    default:
        return (NULL);
    }
    return (strdup(buffer));
}

/*
 * Utility operations on events
 */
void
cpc_event_accum(cpc_event_t *accum, cpc_event_t *event)
{
    if (accum->ce_hrt < event->ce_hrt)
        accum->ce_hrt = event->ce_hrt;
    accum->ce_tsc += event->ce_tsc;
    accum->ce_pic[0] += event->ce_pic[0];
    accum->ce_pic[1] += event->ce_pic[1];
}

void
cpc_event_diff(cpc_event_t *diff, cpc_event_t *left, cpc_event_t *right)
{
    diff->ce_hrt = left->ce_hrt;
    diff->ce_tsc = left->ce_tsc - right->ce_tsc;
    diff->ce_pic[0] = left->ce_pic[0] - right->ce_pic[0];
    diff->ce_pic[1] = left->ce_pic[1] - right->ce_pic[1];
}

/*
 * Given a cpc_event_t and cpc_bind_event() flags,
 * translate the cpc_event_t into the cpc_set_t format.
 *
 * Returns NULL on failure.
 */
cpc_set_t *
__cpc_eventtoset(cpc_t *cpc, cpc_event_t *event, int iflags)
{
    cpc_set_t   *set;
    int     cpuver = event->ce_cpuver;
    char        *pic[2];
    int     flags[2] = { 0, 0 };
    int     i;
    int     j;
    int     nattrs;
    cpc_attr_t  *attr;
    int     intr;

    if ((set = cpc_set_create(cpc)) == NULL) {
        return (NULL);
    }

    if (iflags & CPC_BIND_EMT_OVF)
        flags[0] = flags[1] = CPC_OVF_NOTIFY_EMT;

    switch (cpuver) {
    case CPC_PENTIUM_PRO_MMX:
    case CPC_PENTIUM_PRO:
    {
        struct xpes xpes[2];

        for (i = 0; i < 2; i++) {
            intr = 0;
            nattrs = j = 1;
            unmake_pes(event->ce_pes[i], cpuver, &xpes[i]);
            if ((pic[i] = regtostr(cpuver, i,
                xpes[i].evsel)) == NULL) {
                (void) cpc_set_destroy(cpc, set);
                return (NULL);
            }
            if (xpes[i].usr == 1)
                flags[i] |= CPC_COUNT_USER;
            if (xpes[i].sys == 1)
                flags[i] |= CPC_COUNT_SYSTEM;
            if (xpes[i].irupt == 1) {
                nattrs++;
                intr = 1;
            }

            if (xpes[i].cmask)
                nattrs++;
            if (xpes[i].umask)
                nattrs++;
            if (xpes[i].inv)
                nattrs++;
            if (xpes[i].pc)
                nattrs++;
            if (xpes[i].edge == 0)
                nattrs++;

            if ((attr = (cpc_attr_t *)malloc(nattrs *
                sizeof (cpc_attr_t))) == NULL) {
                (void) cpc_set_destroy(cpc, set);
                errno = ENOMEM;
                return (NULL);
            }

            /*
             * Ensure that pic[0] in the cpc_event_t is bound to
             * physical pic0.
             */
            attr[0].ca_name = "picnum";
            attr[0].ca_val = i;

            if (intr) {
                attr[j].ca_name = "int";
                attr[j].ca_val = 1;
                j++;
            }
            if (xpes[i].cmask) {
                attr[j].ca_name = "cmask";
                attr[j].ca_val = xpes[i].cmask;
                j++;
            }
            if (xpes[i].umask) {
                attr[j].ca_name = "umask";
                attr[j].ca_val = xpes[i].umask;
                j++;
            }
            if (xpes[i].inv) {
                attr[j].ca_name = "inv";
                attr[j].ca_val = 1;
                j++;
            }
            if (xpes[i].pc) {
                attr[j].ca_name = "pc";
                attr[j].ca_val = 1;
                j++;
            }
            if (xpes[i].edge == 0) {
                attr[j].ca_name = "noedge";
                attr[j].ca_val = 1;
                j++;
            }

            if (cpc_set_add_request(cpc, set, pic[i],
                event->ce_pic[i], flags[i], nattrs, attr) == -1) {
                (void) cpc_set_destroy(cpc, set);
                free(pic[i]);
                free(attr);
                return (NULL);
            }
            free(pic[i]);
            free(attr);
        }
    }
    break;
    case CPC_PENTIUM_MMX:
    case CPC_PENTIUM:
    {
        struct xcesr xcesr;
        unmake_cesr(event->ce_cesr, cpuver, &xcesr);

        for (i = 0; i < 2; i++) {
            nattrs = j = 1;

            if ((pic[i] = regtostr(cpuver, i, xcesr.evsel[i]))
                == NULL) {
                (void) cpc_set_destroy(cpc, set);
                return (NULL);
            }

            if (xcesr.usr[i] == 1)
                flags[i] |= CPC_COUNT_USER;
            if (xcesr.sys[i] == 1)
                flags[i] |= CPC_COUNT_SYSTEM;
            if (xcesr.clk[i] == 1)
                nattrs++;
            if (xcesr.pc[i] == 1)
                nattrs++;

            if ((attr = (cpc_attr_t *)malloc(nattrs *
                sizeof (cpc_attr_t))) == NULL) {
                (void) cpc_set_destroy(cpc, set);
                errno = ENOMEM;
                return (NULL);
            }

            /*
             * Ensure that pic[0] in the cpc_event_t is bound to
             * physical pic0.
             */
            attr[0].ca_name = "picnum";
            attr[0].ca_val = i;

            if (xcesr.clk[i] == 1) {
                attr[j].ca_name = "noedge";
                attr[j].ca_val = 1;
                j++;
            }

            if (xcesr.pc[i] == 1) {
                attr[j].ca_name = "pc";
                attr[j].ca_val = 1;
                j++;
            }

            if (cpc_set_add_request(cpc, set, pic[i],
                event->ce_pic[i], flags[i], nattrs, attr) == -1) {
                (void) cpc_set_destroy(cpc, set);
                free(pic[i]);
                free(attr);
                return (NULL);
            }

            free(pic[i]);
            free(attr);
        }
    }
    break;
    default:
        (void) cpc_set_destroy(cpc, set);
        return (NULL);
    }

    return (set);
}