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SubjectRe: [PATCH v4 3/5] perf stat: Helper functions for PCIe root ports list in iostat mode
On Wed, Feb 3, 2021 at 10:58 PM Alexander Antonov
<alexander.antonov@linux.intel.com> wrote:
>
> Introduce helper functions to control PCIe root ports list.
> These helpers will be used in the follow-up patch.
>
> Signed-off-by: Alexander Antonov <alexander.antonov@linux.intel.com>
> ---
> tools/perf/arch/x86/util/iostat.c | 124 ++++++++++++++++++++++++++++++
> 1 file changed, 124 insertions(+)
> create mode 100644 tools/perf/arch/x86/util/iostat.c
>
> diff --git a/tools/perf/arch/x86/util/iostat.c b/tools/perf/arch/x86/util/iostat.c
> new file mode 100644
> index 000000000000..961e540106e6
> --- /dev/null
> +++ b/tools/perf/arch/x86/util/iostat.c
> @@ -0,0 +1,124 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * perf iostat
> + *
> + * Copyright (C) 2020, Intel Corporation
> + *
> + * Authors: Alexander Antonov <alexander.antonov@linux.intel.com>
> + */
> +
> +#include <api/fs/fs.h>
> +#include <linux/kernel.h>
> +#include <linux/err.h>
> +#include <limits.h>
> +#include <stdio.h>
> +#include <string.h>
> +#include <errno.h>
> +#include <sys/types.h>
> +#include <sys/stat.h>
> +#include <fcntl.h>
> +#include <dirent.h>
> +#include <unistd.h>
> +#include <stdlib.h>
> +#include <regex.h>
> +#include "util/cpumap.h"
> +#include "util/debug.h"
> +#include "util/iostat.h"
> +#include "util/counts.h"
> +#include "path.h"
> +
> +struct iio_root_port {
> + u32 domain;
> + u8 bus;
> + u8 die;
> + u8 pmu_idx;
> + int idx;
> +};
> +
> +struct iio_root_ports_list {
> + struct iio_root_port **rps;
> + int nr_entries;
> +};
> +
> +static void iio_root_port_show(FILE *output,
> + const struct iio_root_port * const rp)
> +{
> + if (output && rp)
> + fprintf(output, "S%d-uncore_iio_%d<%04x:%02x>\n",
> + rp->die, rp->pmu_idx, rp->domain, rp->bus);
> +}
> +
> +static struct iio_root_port *iio_root_port_new(u32 domain, u8 bus,
> + u8 die, u8 pmu_idx)
> +{
> + struct iio_root_port *p = calloc(1, sizeof(*p));
> +
> + if (p) {
> + p->domain = domain;
> + p->bus = bus;
> + p->die = die;
> + p->pmu_idx = pmu_idx;
> + }
> + return p;
> +}
> +
> +static struct iio_root_ports_list *iio_root_ports_list_new(void)
> +{
> + struct iio_root_ports_list *list = calloc(1, sizeof(*list));
> +
> + if (list) {
> + list->rps = calloc(1, sizeof(struct iio_root_port *));

This seems unnecessary now.

Thanks,
Namhyung


> + if (!list->rps) {
> + free(list);
> + list = NULL;
> + }
> + }
> + return list;
> +}
> +
> +static void iio_root_ports_list_free(struct iio_root_ports_list *list)
> +{
> + int idx;
> +
> + if (list) {
> + for (idx = 0; idx < list->nr_entries; idx++)
> + free(list->rps[idx]);
> + free(list->rps);
> + free(list);
> + }
> +}
> +
> +static struct iio_root_port *iio_root_port_find_by_notation(
> + const struct iio_root_ports_list * const list, u32 domain, u8 bus)
> +{
> + int idx;
> + struct iio_root_port *rp;
> +
> + if (list) {
> + for (idx = 0; idx < list->nr_entries; idx++) {
> + rp = list->rps[idx];
> + if (rp && rp->domain == domain && rp->bus == bus)
> + return rp;
> + }
> + }
> + return NULL;
> +}
> +
> +static int iio_root_ports_list_insert(struct iio_root_ports_list *list,
> + struct iio_root_port * const rp)
> +{
> + struct iio_root_port **tmp_buf;
> +
> + if (list && rp) {
> + rp->idx = list->nr_entries++;
> + tmp_buf = realloc(list->rps,
> + list->nr_entries * sizeof(*list->rps));
> + if (!tmp_buf) {
> + pr_err("Failed to realloc memory\n");
> + return -ENOMEM;
> + }
> + tmp_buf[rp->idx] = rp;
> + list->rps = tmp_buf;
> + }
> + return 0;
> +}
> --
> 2.19.1
>

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