From: Nicholas Nunley <nicholas.d.nun...@intel.com> Get all masked queues' coalesce settings from kernel and dump them one by one.
Example: $ sudo ./ethtool --per-queue eth5 queue_mask 0x11 --show-coalesce Queue: 0 Adaptive RX: off TX: off stats-block-usecs: 0 sample-interval: 0 pkt-rate-low: 0 pkt-rate-high: 0 rx-usecs: 222 rx-frames: 0 rx-usecs-irq: 0 rx-frames-irq: 256 tx-usecs: 222 tx-frames: 0 tx-usecs-irq: 0 tx-frames-irq: 256 rx-usecs-low: 0 rx-frame-low: 0 tx-usecs-low: 0 tx-frame-low: 0 rx-usecs-high: 0 rx-frame-high: 0 tx-usecs-high: 0 tx-frame-high: 0 Queue: 4 Adaptive RX: off TX: off stats-block-usecs: 0 sample-interval: 0 pkt-rate-low: 0 pkt-rate-high: 0 rx-usecs: 222 rx-frames: 0 rx-usecs-irq: 0 rx-frames-irq: 256 tx-usecs: 222 tx-frames: 0 tx-usecs-irq: 0 tx-frames-irq: 256 rx-usecs-low: 0 rx-frame-low: 0 tx-usecs-low: 0 tx-frame-low: 0 rx-usecs-high: 0 rx-frame-high: 0 tx-usecs-high: 0 tx-frame-high: 0 Based on patch by Kan Liang <kan.li...@intel.com> Signed-off-by: Nicholas Nunley <nicholas.d.nun...@intel.com> --- ethtool.8.in | 2 +- ethtool.c | 68 +++++++++++++++++++++++++++++++++++++++++++++++++--- 2 files changed, 66 insertions(+), 4 deletions(-) diff --git a/ethtool.8.in b/ethtool.8.in index 10f24db..b4e240e 100644 --- a/ethtool.8.in +++ b/ethtool.8.in @@ -1153,7 +1153,7 @@ Sets the specific queues which the sub command is applied to. If queue_mask is not set, the sub command will be applied to all queues. .TP .B sub_command -Sub command to apply. +Sub command to apply. The supported sub commands include --show-coalesce. .RE .SH BUGS Not supported (in part or whole) on all network drivers. diff --git a/ethtool.c b/ethtool.c index 5f72741..1abf7c0 100644 --- a/ethtool.c +++ b/ethtool.c @@ -1410,6 +1410,31 @@ static int dump_coalesce(const struct ethtool_coalesce *ecoal) return 0; } +void dump_per_queue_coalesce(struct ethtool_per_queue_op *per_queue_opt, + __u32 *queue_mask, int n_queues) +{ + struct ethtool_coalesce *ecoal; + int i, idx = 0; + + ecoal = (struct ethtool_coalesce *)(per_queue_opt + 1); + for (i = 0; i < __KERNEL_DIV_ROUND_UP(MAX_NUM_QUEUE, 32); i++) { + int queue = i * 32; + __u32 mask = queue_mask[i]; + + while (mask > 0) { + if (mask & 0x1) { + fprintf(stdout, "Queue: %d\n", queue); + dump_coalesce(ecoal + idx); + idx++; + } + mask = mask >> 1; + queue++; + } + if (idx == n_queues) + break; + } +} + struct feature_state { u32 off_flags; struct ethtool_gfeatures features; @@ -5248,7 +5273,8 @@ static const struct option { { "--show-fec", 1, do_gfec, "Show FEC settings"}, { "--set-fec", 1, do_sfec, "Set FEC settings", " [ encoding auto|off|rs|baser [...]]\n"}, - { "-Q|--per-queue", 1, do_perqueue, "Apply per-queue command", + { "-Q|--per-queue", 1, do_perqueue, "Apply per-queue command." + "The supported sub commands include --show-coalesce", " [queue_mask %x] SUB_COMMAND\n"}, { "-h|--help", 0, show_usage, "Show this help" }, { "--version", 0, do_version, "Show version number" }, @@ -5315,8 +5341,32 @@ static int find_max_num_queues(struct cmd_context *ctx) echannels.combined_count; } +static struct ethtool_per_queue_op * +get_per_queue_coalesce(struct cmd_context *ctx, __u32 *queue_mask, int n_queues) +{ + struct ethtool_per_queue_op *per_queue_opt; + + per_queue_opt = malloc(sizeof(*per_queue_opt) + n_queues * + sizeof(struct ethtool_coalesce)); + if (!per_queue_opt) + return NULL; + + memcpy(per_queue_opt->queue_mask, queue_mask, + __KERNEL_DIV_ROUND_UP(MAX_NUM_QUEUE, 32) * sizeof(__u32)); + per_queue_opt->cmd = ETHTOOL_PERQUEUE; + per_queue_opt->sub_command = ETHTOOL_GCOALESCE; + if (send_ioctl(ctx, per_queue_opt)) { + free(per_queue_opt); + perror("Cannot get device per queue parameters"); + return NULL; + } + + return per_queue_opt; +} + static int do_perqueue(struct cmd_context *ctx) { + struct ethtool_per_queue_op *per_queue_opt; __u32 queue_mask[__KERNEL_DIV_ROUND_UP(MAX_NUM_QUEUE, 32)] = {0}; int i, n_queues = 0; @@ -5367,9 +5417,21 @@ static int do_perqueue(struct cmd_context *ctx) if (i < 0) exit_bad_args(); - /* no sub_command support yet */ + if (strstr(args[i].opts, "--show-coalesce") != NULL) { + per_queue_opt = get_per_queue_coalesce(ctx, queue_mask, + n_queues); + if (per_queue_opt == NULL) { + perror("Cannot get device per queue parameters"); + return -EFAULT; + } + dump_per_queue_coalesce(per_queue_opt, queue_mask, n_queues); + free(per_queue_opt); + } else { + perror("The subcommand is not supported yet"); + return -EOPNOTSUPP; + } - return -EOPNOTSUPP; + return 0; } int main(int argc, char **argp) -- 2.20.1